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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">     <html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en" xmlns:og="http://ogp.me/ns#" xmlns:fb="http://ogp.me/ns/fb#"> <head> <title>Simultaneous <math><mi>γ</mi></math>-ray and electron spectroscopy of <math><mmultiscripts><mi>Hg</mi><mprescripts/><none/><mrow><mn>182</mn><mo>,</mo><mn>184</mn><mo>,</mo><mn>186</mn></mrow></mmultiscripts></math> isotopes - CERN Document Server</title> <link href='https://framework.web.cern.ch/framework/2.0/fonts/PTSansWeb/PTSansWeb.css' rel='stylesheet' type='text/css' /> <link rel="stylesheet" href="https://cds.cern.ch/img/invenio.css?v=20141127" type="text/css" /> <link rel="stylesheet" href="https://cds.cern.ch/img/cern_theme/css/cern_theme.css?v=20141127" type="text/css" /> <link rel="stylesheet"href="/css/font-awesome.min.css"> <meta http-equiv="X-UA-Compatible" content="IE=Edge"/> <link rel="stylesheet" href="https://cds.cern.ch/img/cern_toolbar/css/toolbar.css" type="text/css" />    <link rel="canonical" href="https://cds.cern.ch/record/2866156" /> <link rel="alternate" hreflang="el" href="https://cds.cern.ch/record/2866156?ln=el" /> <link rel="alternate" hreflang="fr" href="https://cds.cern.ch/record/2866156?ln=fr" /> <link rel="alternate" hreflang="bg" href="https://cds.cern.ch/record/2866156?ln=bg" /> <link rel="alternate" hreflang="zh-TW" href="https://cds.cern.ch/record/2866156?ln=zh_TW" /> <link rel="alternate" hreflang="pt" href="https://cds.cern.ch/record/2866156?ln=pt" /> <link rel="alternate" hreflang="no" href="https://cds.cern.ch/record/2866156?ln=no" /> <link rel="alternate" hreflang="hr" href="https://cds.cern.ch/record/2866156?ln=hr" /> <link rel="alternate" hreflang="ca" href="https://cds.cern.ch/record/2866156?ln=ca" /> <link rel="alternate" hreflang="de" href="https://cds.cern.ch/record/2866156?ln=de" /> <link rel="alternate" hreflang="it" href="https://cds.cern.ch/record/2866156?ln=it" /> <link rel="alternate" hreflang="zh-CN" href="https://cds.cern.ch/record/2866156?ln=zh_CN" /> <link rel="alternate" hreflang="sv" href="https://cds.cern.ch/record/2866156?ln=sv" /> <link rel="alternate" hreflang="sk" href="https://cds.cern.ch/record/2866156?ln=sk" /> <link rel="alternate" hreflang="en" href="https://cds.cern.ch/record/2866156?ln=en" /> <link rel="alternate" hreflang="pl" href="https://cds.cern.ch/record/2866156?ln=pl" /> <link rel="alternate" hreflang="ru" href="https://cds.cern.ch/record/2866156?ln=ru" /> <link rel="alternate" hreflang="ka" href="https://cds.cern.ch/record/2866156?ln=ka" /> <link rel="alternate" hreflang="ja" href="https://cds.cern.ch/record/2866156?ln=ja" /> <link rel="alternate" hreflang="es" href="https://cds.cern.ch/record/2866156?ln=es" /> <link rel="alternate" type="application/rss+xml" title="CERN Document Server RSS" href="/rss?ln=en" /> <link rel="search" type="application/opensearchdescription+xml" href="https://cds.cern.ch/opensearchdescription" title="CERN Document Server" /> <link rel="unapi-server" type="application/xml" title="unAPI" href="https://cds.cern.ch/unapi" /> <link rel="apple-touch-icon" href="/apple-touch-icon.png"/> <link rel="apple-touch-icon-precomposed" href="/apple-touch-icon-precomposed.png"/> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta http-equiv="Content-Language" content="en" /> <meta name="description" content="Background: The mercury isotopes around <math><mrow><mi>N</mi><mo>=</mo><mn>104</mn></mrow></math> are a well-known example of nuclei exhibiting shape coexistence. Mixing of configurations can be studied by measuring the monopole strength <math><mrow><msup><mi>ρ</mi><mn>2</mn></msup><mrow><mo>(</mo><mi>E</mi><mn>0</mn><mo>)</mo></mrow></mrow></math>, however, currently the experimental information is scarce and lacks precision, especially for the <math><mrow><msup><mi>I</mi><mi>π</mi></msup><mo>→</mo><msup><mi>I</mi><mi>π</mi></msup></mrow></math> (<math><mrow><mi>I</mi><mo>≠</mo><mn>0</mn></mrow></math>) transitions. Purpose: The goals of this study were to increase the precision of the known branching ratios and internal conversion coefficients, to increase the amount of available information regarding excited states in <math><mmultiscripts><mi>Hg</mi><mprescripts/><none/><mrow><mn>182</mn><mo>,</mo><mn>184</mn><mo>,</mo><mn>186</mn></mrow></mmultiscripts></math>, and to interpret the results in the framework of shape coexistence using different models. Method: The low-energy structures in <math><mmultiscripts><mi>Hg</mi><mprescripts/><none/><mrow><mn>182</mn><mo>,</mo><mn>184</mn><mo>,</mo><mn>186</mn></mrow></mmultiscripts></math> were populated in the <math><mi>β</mi></math> decay of <math><mmultiscripts><mi>Tl</mi><mprescripts/><none/><mrow><mn>182</mn><mo>,</mo><mn>184</mn><mo>,</mo><mn>186</mn></mrow></mmultiscripts></math>, produced at ISOLDE, CERN and purified by laser ionization and mass separation. The <math><mi>γ</mi></math>-ray and internal conversion electron events were detected by five germanium clover detectors and a segmented silicon detector, respectively, and correlated in time to build decay schemes. Results: In total, 193, 178, and 156 transitions, including 144, 140, and 108 observed for the first time in a <math><mi>β</mi></math>-decay experiment, were assigned to <math><mmultiscripts><mi>Hg</mi><mprescripts/><none/><mrow><mn>182</mn><mo>,</mo><mn>184</mn><mo>,</mo><mn>186</mn></mrow></mmultiscripts></math>, respectively. Internal conversion coefficients were determined for 23 transitions, out of which 12 had an <math><mrow><mi>E</mi><mn>0</mn></mrow></math> component. Extracted branching ratios allowed the sign of the interference term in <math><mmultiscripts><mi>Hg</mi><mprescripts/><none/><mn>182</mn></mmultiscripts></math> as well as <math><mrow><msup><mi>ρ</mi><mn>2</mn></msup><mrow><mo>(</mo><mi>E</mi><mn>0</mn><mo>;</mo><msubsup><mn>0</mn><mn>2</mn><mo>+</mo></msubsup><mo>→</mo><msubsup><mn>0</mn><mn>1</mn><mo>+</mo></msubsup><mo>)</mo></mrow></mrow></math> and <math><mrow><mi>B</mi><mo>(</mo><mi>E</mi><mn>2</mn><mo>;</mo><msubsup><mn>0</mn><mn>2</mn><mo>+</mo></msubsup><mo>→</mo><msubsup><mn>2</mn><mn>1</mn><mo>+</mo></msubsup><mo>)</mo></mrow></math> in <math><mmultiscripts><mi>Hg</mi><mprescripts/><none/><mn>184</mn></mmultiscripts></math> to be determined. By means of electron-electron coincidences, the <math><msubsup><mn>0</mn><mn>3</mn><mo>+</mo></msubsup></math> state was identified in <math><mmultiscripts><mi>Hg</mi><mprescripts/><none/><mn>184</mn></mmultiscripts></math>. The experimental results were qualitatively reproduced by five theoretical approaches, the interacting boson model with configuration mixing with two different parametrizations, the general Bohr Hamiltonian, the beyond mean-field model, and the symmetry-conserving configuration-mixing model. However, a quantitative description is lacking. Conclusions: The presence of shape coexistence in neutron-deficient mercury isotopes was confirmed and evidence for the phenomenon existing at higher energies was found. The new experimental results provide important spectroscopic input for future Coulomb excitation studies. Background: The mercury isotopes around $N=104$ are a well-known example of nuclei exhibiting shape coexistence. Mixing of configurations can be studied by measuring the monopole strength $\rho^2(E0)$, however, currently the experimental information is scarce and lacks precision, especially for the $I^\pi \rightarrow I^\pi$ ($I \neq 0$) transitions. Purpose: The goals of this study were to increase the precision of the known branching ratios and internal conversion coefficients, to increase the amount of available information regarding excited states in $^{182,184,186}$Hg and to interpret the results in the framework of shape coexistence using different models. Method: The low-energy structures in $^{182,184,186}$Hg were populated in the $\beta$ decay of $^{182,184,186}$Tl, produced at ISOLDE and purified by laser ionization and mass separation. The $\gamma$-ray and internal conversion electron events were detected by five germanium clover detectors and a segmented silicon detector, respectively, and correlated in time to build decay schemes. Results: In total, 193, 178 and 156 transitions, including 144, 140 and 108 observed for the first time in a $\beta$-decay experiment, were assigned to $^{182,184,186}$Hg, respectively. Internal conversion coefficients were determined for 23 transitions, out of which 12 had an $E0$ component. Extracted branching ratios allowed the sign of the interference term in $^{182}$Hg as well as $\rho^2(E0;0^+_2\rightarrow 0^+_1)$ and $B(E2;0^+_2\rightarrow 2^+_1)$ in $^{184}$Hg to be determined. By means of electron-electron coincidences, the $0^+_3$ state was identified in $^{184}$Hg. The experimental results were qualitatively reproduced by five theoretical approaches, the IBM with configuration mixing with two different parametrizations, the General Bohr Hamiltonian, the BMF model and the SCCM model. However, a quantitative description is lacking. Stryjczyk, M.; Andel, B.; Cubiss, J.G.; Rezynkina, K.; Rodríguez, T.R.; García-Ramos, J.E.; Andreyev, A.N.; Pakarinen, J.; Van Duppen, P.; Antalic, S.; Berry, T.; Borge, M.J.G.; Clisu, C.; Cox, D.M.; De Witte, H.; Fraile, L.M.; Fynbo, H.O.U.; Gaffney, L.P.; Harkness-Brennan, L.J.; Huyse, M.; Illana, A.; Judson, D.S.; Konki, J.; Kurcewicz, J.; Lazarus, I.; Lica, R.; Madurga, M.; Marginean, N.; Marginean, R.; Mihai, C.; Mosat, P.; Nacher, E.; Negret, A.; Ojala, J.; Ovejas, J.D.; Page, R.D.; Papadakis, P.; Pascu, S.; Perea, A.; Podolyák, Zs.; Próchniak, L.; Pucknell, V.; Rapisarda, E.; Rotaru, F.; Sotty, C.; Tengblad, O.; Vedia, V.; Viñals, S.; Wadsworth, R.; Warr, N.; Wrzosek-Lipska, K." /> <meta name="keywords" content="CERN Document Server, WebSearch, CERN Document Server" /> <script type="text/javascript" src="https://cds.cern.ch/js/jquery.min.js"></script>  <link rel="stylesheet" href="https://cds.cern.ch/img/webnews.css" type="text/css" />  <script type="text/javascript" src="https://cds.cern.ch/js/webnews.js?v=20131009"></script> <meta property="fb:app_id" content="137353533001720"/> <script type="text/x-mathjax-config"> MathJax.Hub.Config({ tex2jax: {inlineMath: [['$','$']], processEscapes: true}, showProcessingMessages: false, messageStyle: "none" }); </script> <script src="/MathJax/MathJax.js?config=TeX-AMS_CHTML" type="text/javascript"> </script>  <meta content="APS : Simultaneous γ-ray and electron spectroscopy of Hg182,184,186 isotopes" name="citation_title" /> <meta content="Stryjczyk, M." name="citation_author" /> <meta content="Gaffney, L.P." name="citation_author" /> <meta content="Papadakis, P." name="citation_author" /> <meta content="Andel, B." name="citation_author" /> <meta content="Rezynkina, K." name="citation_author" /> <meta content="Cox, D.M." name="citation_author" /> <meta content="Judson, D.S." name="citation_author" /> <meta content="Rapisarda, E." name="citation_author" /> <meta content="Clisu, C." name="citation_author" /> <meta content="Konki, J." name="citation_author" /> <meta content="Antalic, S." name="citation_author" /> <meta content="Sotty, C." name="citation_author" /> <meta content="Page, R.D." name="citation_author" /> <meta content="Marginean, R." name="citation_author" /> <meta content="Rodríguez, T.R." name="citation_author" /> <meta content="Harkness-Brennan, L.J." name="citation_author" /> <meta content="Warr, N." name="citation_author" /> <meta content="Mosat, P." name="citation_author" /> <meta content="Pakarinen, J." name="citation_author" /> <meta content="Fynbo, H.O.U." name="citation_author" /> <meta content="Ojala, J." name="citation_author" /> <meta content="Cubiss, J.G." name="citation_author" /> <meta content="Wadsworth, R." name="citation_author" /> <meta content="Mihai, C." name="citation_author" /> <meta content="Rotaru, F." name="citation_author" /> <meta content="Tengblad, O." name="citation_author" /> <meta content="Madurga, M." name="citation_author" /> <meta content="García-Ramos, J.E." name="citation_author" /> <meta content="Pascu, S." name="citation_author" /> <meta content="De Witte, H." name="citation_author" /> <meta content="Próchniak, L." name="citation_author" /> <meta content="Viñals, S." name="citation_author" /> <meta content="Van Duppen, P." name="citation_author" /> <meta content="Ovejas, J.D." name="citation_author" /> <meta content="Illana, A." name="citation_author" /> <meta content="Andreyev, A.N." name="citation_author" /> <meta content="Wrzosek-Lipska, K." name="citation_author" /> <meta content="Nacher, E." name="citation_author" /> <meta content="Kurcewicz, J." name="citation_author" /> <meta content="Huyse, M." name="citation_author" /> <meta content="Borge, M.J.G." name="citation_author" /> <meta content="Perea, A." name="citation_author" /> <meta content="Marginean, N." name="citation_author" /> <meta content="Fraile, L.M." name="citation_author" /> <meta content="Lazarus, I." name="citation_author" /> <meta content="Pucknell, V." name="citation_author" /> <meta content="Podolyák, Zs." name="citation_author" /> <meta content="Lica, R." name="citation_author" /> <meta content="Negret, A." name="citation_author" /> <meta content="Vedia, V." name="citation_author" /> <meta content="Berry, T." name="citation_author" /> <meta content="10.1103/PhysRevC.108.014308" name="citation_doi" /> <meta content="Phys. 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C" name="citation_journal_title" /> <meta content="108" name="citation_volume" /> <meta content="014308" name="citation_firstpage" /> <meta content="2023/05/25" name="citation_publication_date" /> <meta name="citation_online_date" content="2023/07/28"> <meta content="arXiv:2305.16442" name="citation_technical_report_number" /> <meta content="10.1103/PhysRevC.108.014308" name="citation_doi" /> <meta name="citation_pdf_url" content="https://cds.cern.ch/record/2866156/files/Publication.pdf" /> <meta name="citation_pdf_url" content="https://cds.cern.ch/record/2866156/files/2305.16442.pdf" />  <meta content="APS" property="og:title" /> <meta content="Simultaneous γ-ray and electron spectroscopy of Hg182,184,186 isotopes" property="og:title" /> <meta content="website" property="og:type" /> <meta content="https://cds.cern.ch/record/2866156" property="og:url" /> <meta name="twitter:image" content="https://cds.cern.ch/record/2866156/files/216K.png" /> <meta property="og:image" 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content="https://cds.cern.ch/record/2866156/files/511K.png" /> <meta property="og:image:secure_url" content="https://cds.cern.ch/record/2866156/files/511K.png" /> <meta content="CERN Document Server" property="og:site_name" /> <meta content="APS" property="og:description" /> <meta content="arXiv" property="og:description" /> <meta content="Background: The mercury isotopes around N=104 are a well-known example of nuclei exhibiting shape coexistence. Mixing of configurations can be studied by measuring the monopole strength ρ2(E0), however, currently the experimental information is scarce and lacks precision, especially for the Iπ→Iπ (I≠0) transitions. Purpose: The goals of this study were to increase the precision of the known branching ratios and internal conversion coefficients, to increase the amount of available information regarding excited states in Hg182,184,186, and to interpret the results in the framework of shape coexistence using different models. Method: The low-energy structures in Hg182,184,186 were populated in the β decay of Tl182,184,186, produced at ISOLDE, CERN and purified by laser ionization and mass separation. The γ-ray and internal conversion electron events were detected by five germanium clover detectors and a segmented silicon detector, respectively, and correlated in time to build decay schemes. Results: In total, 193, 178, and 156 transitions, including 144, 140, and 108 observed for the first time in a β-decay experiment, were assigned to Hg182,184,186, respectively. Internal conversion coefficients were determined for 23 transitions, out of which 12 had an E0 component. Extracted branching ratios allowed the sign of the interference term in Hg182 as well as ρ2(E0;02+→01+) and B(E2;02+→21+) in Hg184 to be determined. By means of electron-electron coincidences, the 03+ state was identified in Hg184. The experimental results were qualitatively reproduced by five theoretical approaches, the interacting boson model with configuration mixing with two different parametrizations, the general Bohr Hamiltonian, the beyond mean-field model, and the symmetry-conserving configuration-mixing model. However, a quantitative description is lacking. Conclusions: The presence of shape coexistence in neutron-deficient mercury isotopes was confirmed and evidence for the phenomenon existing at higher energies was found. The new experimental results provide important spectroscopic input for future Coulomb excitation studies." property="og:description" /> <meta content="Background: The mercury isotopes around $N=104$ are a well-known example of nuclei exhibiting shape coexistence. Mixing of configurations can be studied by measuring the monopole strength $\rho^2(E0)$, however, currently the experimental information is scarce and lacks precision, especially for the $I^\pi \rightarrow I^\pi$ ($I \neq 0$) transitions. Purpose: The goals of this study were to increase the precision of the known branching ratios and internal conversion coefficients, to increase the amount of available information regarding excited states in $^{182,184,186}$Hg and to interpret the results in the framework of shape coexistence using different models. Method: The low-energy structures in $^{182,184,186}$Hg were populated in the $\beta$ decay of $^{182,184,186}$Tl, produced at ISOLDE and purified by laser ionization and mass separation. The $\gamma$-ray and internal conversion electron events were detected by five germanium clover detectors and a segmented silicon detector, respectively, and correlated in time to build decay schemes. Results: In total, 193, 178 and 156 transitions, including 144, 140 and 108 observed for the first time in a $\beta$-decay experiment, were assigned to $^{182,184,186}$Hg, respectively. Internal conversion coefficients were determined for 23 transitions, out of which 12 had an $E0$ component. Extracted branching ratios allowed the sign of the interference term in $^{182}$Hg as well as $\rho^2(E0;0^+_2\rightarrow 0^+_1)$ and $B(E2;0^+_2\rightarrow 2^+_1)$ in $^{184}$Hg to be determined. By means of electron-electron coincidences, the $0^+_3$ state was identified in $^{184}$Hg. The experimental results were qualitatively reproduced by five theoretical approaches, the IBM with configuration mixing with two different parametrizations, the General Bohr Hamiltonian, the BMF model and the SCCM model. 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var affiliation = $(this).data('affiliation') + '</br>'; var contribution = $(this).data('contribution') + '</br>'; $.magnificPopup.open({ items: { src: '<div id="ovelary-mathjax" class="overlay-white oc-content overlay-white-500">' + author + affiliation + contribution + '</div>', type: 'inline' }, callbacks: { open: function() { var div = document.getElementById("overlay-mathjax") MathJax.Hub.Queue(["Typeset", MathJax.Hub, div]); }, } }) }) }); </script> <tr><td class="formatRecordLabel"> Report number </td><td style="padding-left:5px;"><a href="http://arxiv.org/abs/arXiv:2305.16442">arXiv:2305.16442</a></td></tr> <tr><td class="formatRecordLabel"> Title </td><td style="padding-left:5px;"><b>Simultaneous <math><mi>γ</mi></math>-ray and electron spectroscopy of <math><mmultiscripts><mi>Hg</mi><mprescripts/><none/><mrow><mn>182</mn><mo>,</mo><mn>184</mn><mo>,</mo><mn>186</mn></mrow></mmultiscripts></math> isotopes</b></td></tr> <tr><td class="formatRecordLabel"><span style="white-space:nowrap;"> Author(s) </span> </td><td style="padding-left:5px;"> <script type="text/javascript"> function toggle_authors_visibility(){ var more = document.getElementById('more'); var link = document.getElementById('link'); var extension = document.getElementById('extension'); if (more.style.display=='none'){ more.style.display = ''; extension.style.display = 'none'; link.innerHTML = "Hide" } else { more.style.display = 'none'; extension.style.display = ''; link.innerHTML = "Show all 51 authors" } link.style.color = "rgb(204,0,0);" } function set_up(){ var extension = document.getElementById('extension'); extension.innerHTML = "IDS Collaboration "; toggle_authors_visibility(); } </script> <a name="show_hide" /><p id="more" style=""><a href="https://cds.cern.ch/search?f=author&p=Stryjczyk%2C%20M.&ln=en">Stryjczyk, M.</a> (KU Leuven, Dept. Phys. Astron. ; Jyvaskyla U.) ; <a href="https://cds.cern.ch/search?f=author&p=Andel%2C%20B.&ln=en">Andel, B.</a> (KU Leuven, Dept. Phys. Astron. ; Comenius U.) ; <a href="https://cds.cern.ch/search?f=author&p=Cubiss%2C%20J.G.&ln=en">Cubiss, J.G.</a> (CERN ; York U., England) ; <a href="https://cds.cern.ch/search?f=author&p=Rezynkina%2C%20K.&ln=en">Rezynkina, K.</a> (KU Leuven, Dept. Phys. Astron. ; INFN, Padua) ; <a href="https://cds.cern.ch/search?f=author&p=Rodr%C3%ADguez%2C%20T.R.&ln=en">Rodríguez, T.R.</a> (Madrid, Autonoma U. ; Madrid U.) ; <a href="https://cds.cern.ch/search?f=author&p=Garc%C3%ADa-Ramos%2C%20J.E.&ln=en">García-Ramos, J.E.</a> (Huelva U. ; Granada U., Theor. Phys. Astrophys.) ; <a href="https://cds.cern.ch/search?f=author&p=Andreyev%2C%20A.N.&ln=en">Andreyev, A.N.</a> (York U., England ; Kyushu U.) ; <a href="https://cds.cern.ch/search?f=author&p=Pakarinen%2C%20J.&ln=en">Pakarinen, J.</a> (Jyvaskyla U. ; Helsinki Inst. of Phys.) ; <a href="https://cds.cern.ch/search?f=author&p=Van%20Duppen%2C%20P.&ln=en">Van Duppen, P.</a> (KU Leuven, Dept. Phys. Astron.) ; <a href="https://cds.cern.ch/search?f=author&p=Antalic%2C%20S.&ln=en">Antalic, S.</a> (Comenius U.) ; <a href="https://cds.cern.ch/search?f=author&p=Berry%2C%20T.&ln=en">Berry, T.</a> (Surrey U.) ; <a href="https://cds.cern.ch/search?f=author&p=Borge%2C%20M.J.G.&ln=en">Borge, M.J.G.</a> (Madrid, Inst. Estructura Materia ; CERN) ; <a href="https://cds.cern.ch/search?f=author&p=Clisu%2C%20C.&ln=en">Clisu, C.</a> (Bucharest, IFIN-HH) ; <a href="https://cds.cern.ch/search?f=author&p=Cox%2C%20D.M.&ln=en">Cox, D.M.</a> (Lund U.) ; <a href="https://cds.cern.ch/search?f=author&p=De%20Witte%2C%20H.&ln=en">De Witte, H.</a> (KU Leuven, Dept. Phys. Astron.) ; <a href="https://cds.cern.ch/search?f=author&p=Fraile%2C%20L.M.&ln=en">Fraile, L.M.</a> (Madrid U.) ; <a href="https://cds.cern.ch/search?f=author&p=Fynbo%2C%20H.O.U.&ln=en">Fynbo, H.O.U.</a> (Aarhus U.) ; <a href="https://cds.cern.ch/search?f=author&p=Gaffney%2C%20L.P.&ln=en">Gaffney, L.P.</a> (CERN ; Liverpool U.) ; <a href="https://cds.cern.ch/search?f=author&p=Harkness-Brennan%2C%20L.J.&ln=en">Harkness-Brennan, L.J.</a> (Liverpool U.) ; <a href="https://cds.cern.ch/search?f=author&p=Huyse%2C%20M.&ln=en">Huyse, M.</a> (KU Leuven, Dept. Phys. Astron.) ; <a href="https://cds.cern.ch/search?f=author&p=Illana%2C%20A.&ln=en">Illana, A.</a> (INFN, Legnaro ; Jyvaskyla U. ; Madrid U.) ; <a href="https://cds.cern.ch/search?f=author&p=Judson%2C%20D.S.&ln=en">Judson, D.S.</a> (Liverpool U.) ; <a href="https://cds.cern.ch/search?f=author&p=Konki%2C%20J.&ln=en">Konki, J.</a> (CERN) ; <a href="https://cds.cern.ch/search?f=author&p=Kurcewicz%2C%20J.&ln=en">Kurcewicz, J.</a> (CERN) ; <a href="https://cds.cern.ch/search?f=author&p=Lazarus%2C%20I.&ln=en">Lazarus, I.</a> (Daresbury) ; <a href="https://cds.cern.ch/search?f=author&p=Lica%2C%20R.&ln=en">Lica, R.</a> (Bucharest, IFIN-HH ; CERN) ; <a href="https://cds.cern.ch/search?f=author&p=Madurga%2C%20M.&ln=en">Madurga, M.</a> (CERN ; Tennessee U.) ; <a href="https://cds.cern.ch/search?f=author&p=Marginean%2C%20N.&ln=en">Marginean, N.</a> (Bucharest, IFIN-HH) ; <a href="https://cds.cern.ch/search?f=author&p=Marginean%2C%20R.&ln=en">Marginean, R.</a> (Bucharest, IFIN-HH) ; <a href="https://cds.cern.ch/search?f=author&p=Mihai%2C%20C.&ln=en">Mihai, C.</a> (Bucharest, IFIN-HH) ; <a href="https://cds.cern.ch/search?f=author&p=Mosat%2C%20P.&ln=en">Mosat, P.</a> (Comenius U.) ; <a href="https://cds.cern.ch/search?f=author&p=Nacher%2C%20E.&ln=en">Nacher, E.</a> (Valencia U., IFIC) ; <a href="https://cds.cern.ch/search?f=author&p=Negret%2C%20A.&ln=en">Negret, A.</a> (Bucharest, IFIN-HH) ; <a href="https://cds.cern.ch/search?f=author&p=Ojala%2C%20J.&ln=en">Ojala, J.</a> (Jyvaskyla U. ; Helsinki Inst. of Phys.) ; <a href="https://cds.cern.ch/search?f=author&p=Ovejas%2C%20J.D.&ln=en">Ovejas, J.D.</a> (Madrid, Inst. Estructura Materia) ; <a href="https://cds.cern.ch/search?f=author&p=Page%2C%20R.D.&ln=en">Page, R.D.</a> (Liverpool U.) ; <a href="https://cds.cern.ch/search?f=author&p=Papadakis%2C%20P.&ln=en">Papadakis, P.</a> (Liverpool U. ; Daresbury) ; <a href="https://cds.cern.ch/search?f=author&p=Pascu%2C%20S.&ln=en">Pascu, S.</a> (Bucharest, IFIN-HH) ; <a href="https://cds.cern.ch/search?f=author&p=Perea%2C%20A.&ln=en">Perea, A.</a> (Madrid, Inst. Estructura Materia) ; <a href="https://cds.cern.ch/search?f=author&p=Podoly%C3%A1k%2C%20Zs.&ln=en">Podolyák, Zs.</a> (Surrey U.) ; <a href="https://cds.cern.ch/search?f=author&p=Pr%C3%B3chniak%2C%20L.&ln=en">Próchniak, L.</a> (Warsaw U. ; Munich, Tech. U. ; Silesia U.) ; <a href="https://cds.cern.ch/search?f=author&p=Pucknell%2C%20V.&ln=en">Pucknell, V.</a> (Daresbury) ; <a href="https://cds.cern.ch/search?f=author&p=Rapisarda%2C%20E.&ln=en">Rapisarda, E.</a> (CERN) ; <a href="https://cds.cern.ch/search?f=author&p=Rotaru%2C%20F.&ln=en">Rotaru, F.</a> (Bucharest, IFIN-HH) ; <a href="https://cds.cern.ch/search?f=author&p=Sotty%2C%20C.&ln=en">Sotty, C.</a> (Bucharest, IFIN-HH) ; <a href="https://cds.cern.ch/search?f=author&p=Tengblad%2C%20O.&ln=en">Tengblad, O.</a> (Madrid, Inst. Estructura Materia) ; <a href="https://cds.cern.ch/search?f=author&p=Vedia%2C%20V.&ln=en">Vedia, V.</a> (Madrid U.) ; <a href="https://cds.cern.ch/search?f=author&p=Vi%C3%B1als%2C%20S.&ln=en">Viñals, S.</a> (Madrid, Inst. Estructura Materia) ; <a href="https://cds.cern.ch/search?f=author&p=Wadsworth%2C%20R.&ln=en">Wadsworth, R.</a> (York U., England) ; <a href="https://cds.cern.ch/search?f=author&p=Warr%2C%20N.&ln=en">Warr, N.</a> (Cologne U.) ; <a href="https://cds.cern.ch/search?f=author&p=Wrzosek-Lipska%2C%20K.&ln=en">Wrzosek-Lipska, K.</a> (Warsaw U. ; Munich, Tech. U. ; Silesia U.)</p> <span id="extension"></span> <small><i><a id="link" href="#" onclick="toggle_authors_visibility()" style="color:rgb(204,0,0);"></a></i></small><script type="text/javascript">set_up()</script></td></tr> <tr><td class="formatRecordLabel"> Publication </td><td style="padding-left:5px;">2023-07-06</td></tr> <tr><td class="formatRecordLabel"> Imprint </td><td style="padding-left:5px;">2023-05-25</td></tr> <tr><td class="formatRecordLabel"> Number of pages </td><td style="padding-left:5px;">20</td></tr> <tr><td class="formatRecordLabel"> In: </td><td style="padding-left:5px;"><a href="http://dx.doi.org/10.1103/PhysRevC.108.014308"><i>Phys. Rev. C</i> 108 (2023) 014308</a> </a></td></tr> <tr><td class="formatRecordLabel"> DOI </td><td style="padding-left:5px;"><a href="http://dx.doi.org/10.1103/PhysRevC.108.014308" title="DOI" target="_blank">10.1103/PhysRevC.108.014308</a> (publication) <tr><td class="formatRecordLabel"> Subject category </td><td style="padding-left:5px;">nucl-th ; Nuclear Physics - Theory ; nucl-ex ; Nuclear Physics - Experiment</td></tr> <tr><td class="formatRecordLabel"> Abstract </td><td style="padding-left:5px;">Background: The mercury isotopes around $N=104$ are a well-known example of nuclei exhibiting shape coexistence. Mixing of configurations can be studied by measuring the monopole strength $\rho^2(E0)$, however, currently the experimental information is scarce and lacks precision, especially for the $I^\pi \rightarrow I^\pi$ ($I \neq 0$) transitions. Purpose: The goals of this study were to increase the precision of the known branching ratios and internal conversion coefficients, to increase the amount of available information regarding excited states in $^{182,184,186}$Hg and to interpret the results in the framework of shape coexistence using different models. Method: The low-energy structures in $^{182,184,186}$Hg were populated in the $\beta$ decay of $^{182,184,186}$Tl, produced at ISOLDE and purified by laser ionization and mass separation. The $\gamma$-ray and internal conversion electron events were detected by five germanium clover detectors and a segmented silicon detector, respectively, and correlated in time to build decay schemes. Results: In total, 193, 178 and 156 transitions, including 144, 140 and 108 observed for the first time in a $\beta$-decay experiment, were assigned to $^{182,184,186}$Hg, respectively. Internal conversion coefficients were determined for 23 transitions, out of which 12 had an $E0$ component. Extracted branching ratios allowed the sign of the interference term in $^{182}$Hg as well as $\rho^2(E0;0^+_2\rightarrow 0^+_1)$ and $B(E2;0^+_2\rightarrow 2^+_1)$ in $^{184}$Hg to be determined. By means of electron-electron coincidences, the $0^+_3$ state was identified in $^{184}$Hg. The experimental results were qualitatively reproduced by five theoretical approaches, the IBM with configuration mixing with two different parametrizations, the General Bohr Hamiltonian, the BMF model and the SCCM model. However, a quantitative description is lacking.</td></tr> <tr><td class="formatRecordLabel"> Copyright/License </td><td style="padding-left:5px;">preprint: (License: <a href="http://arxiv.org/licenses/nonexclusive-distrib/1.0/">arXiv nonexclusive-distrib 1.0</a>)<br/>publication: © 2023-2025 authors (License: <a href="https://creativecommons.org/licenses/by/4.0/">CC BY 4.0</a>)</td></tr> </table> <br /><div style="max-width:1024px;margin:auto"><div style="overflow-x:auto;display:inline;width:100%;"><a href="/record/2866156/plots#0"><img style="vertical-align:middle;" src="https://cds.cern.ch/record/2866156/files/182Hg_e.png" title=" Portion of the electron singles energy spectrum collected with the $^{182}$Tl beam. The electron lines associated with $^{182}$Hg have been marked with the transition energy and corresponding atomic orbital, whereas transitions arising from the $A=182$ decay chain are marked with the nucleus of origin." width="200px"/></a> <a href="/record/2866156/plots#1"><img style="vertical-align:middle;" src="https://cds.cern.ch/record/2866156/files/182Hg_gg.png" title=" Portion of the $\gamma$-ray energy spectrum gated on the 351-keV ($2^+_1 \rightarrow 0^+_1$) $\gamma$-ray transition in $^{182}$Hg. The most prominent lines have been labeled with the transition energy in keV." width="200px"/></a> <a href="/record/2866156/plots#2"><img style="vertical-align:middle;" src="https://cds.cern.ch/record/2866156/files/182Hg_small_topaper.png" title=" Partial level scheme of excited states in $^{182}$Hg populated in the $\beta$ decay of $^{182}$Tl extracted in this work. For the full version, see Supplemental Material \cite{supplemental}. Levels and transitions known from the previous $\beta$-decay studies are plotted in black, shifted in the decay scheme in blue, known from other than $\beta$-decay studies in green and newly identified in red. Transitions not observed in this work for which the intensity limits have been determined are plotted with dashed lines. Spins, parities and proposed transition multipolarities are taken from this work and Ref. \cite{Singh2015}." width="200px"/></a> <a href='/record/2866156/plots'>Show more plots</a></div></div><br /> <br/>Corresponding record in: <a href="http://inspirehep.net/record/2662989">Inspire</a> <small> </small> <br/> <br/><br/><div align="right"><div style="padding-bottom:2px;padding-top:30px;"><span class="moreinfo" style="margin-right:10px;"> <a href="" class="moreinfo">Back to search</a> </span></div></div> <div class="bottom-left-folded"><div class="recordlastmodifiedbox" style="position:relative;margin-left:1px"> Record created 2023-07-28, last modified 2024-05-08</div></div> <div class="bottom-right-folded" style="text-align:right;padding-bottom:2px;"> <span class="moreinfo" style="margin-right:10px;"></span></div> </div> </div> </div> <br/> <br /> <div class="detailedrecordminipanel"> <div class="top-left"></div><div class="top-right"></div> <div class="inside"> <div id="detailedrecordminipanelfile" style="width:33%;float:left;text-align:center;margin-top:0"> <div><small class="detailedRecordActions">Fulltext:</small> <br /><em>Publication</em> - <a href="/record/2866156/files/Publication.pdf"><img style="border:none" src="/img/file-icon-text-12x16.gif" alt="Download fulltext"/>PDF</a><br /><em>2305.16442</em> - <a href="/record/2866156/files/2305.16442.pdf"><img style="border:none" src="/img/file-icon-text-12x16.gif" alt="Download fulltext"/>PDF</a><br /></div> </div> <div id="detailedrecordminipanelreview" style="width:30%;float:left;text-align:center"> </div> <div id="detailedrecordminipanelactions" style="width:36%;float:right;text-align:right;"> <ul class="detailedrecordactions"> <li><a href="/yourbaskets/add?ln=en&recid=2866156">Add to personal basket</a></li> <li>Export as <a style="text-decoration:underline;font-weight:normal" href="/record/2866156/export/hx?ln=en">BibTeX</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2866156/export/hm?ln=en">MARC</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2866156/export/xm?ln=en">MARCXML</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2866156/export/xd?ln=en">DC</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2866156/export/xe?ln=en">EndNote</a>,  <a style="text-decoration:underline;font-weight:normal" href="/record/2866156/export/xn?ln=en">NLM</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2866156/export/xw?ln=en">RefWorks</a> </li> </ul> <div style='padding-left: 13px;'>  <div id="bookmark"></div> <div id="bookmark_sciencewise"></div> <style type="text/css"> #bookmark_sciencewise, #bookmark {float: left;} #bookmark_sciencewise li {padding: 2px; width: 25px;} #bookmark_sciencewise ul, #bookmark ul {list-style-image: none;} </style> <script type="text/javascript" src="/js/jquery.bookmark.min.js"></script> <style type="text/css">@import "/css/jquery.bookmark.css";</style> <script type="text/javascript">// <![CDATA[ $.bookmark.addSite('sciencewise', 'ScienceWise.info', 'https://cds.cern.ch/img/sciencewise.png', 'en', 'bookmark', 'http://sciencewise.info/bookmarks/2305.1644/add'); $('#bookmark_sciencewise').bookmark({sites: ['sciencewise']}); $('#bookmark').bookmark({ sites: ['facebook', 'twitter', 'linkedin', 'google_plusone'], icons: '/img/bookmarks.png', url: 'https://cds.cern.ch/record/2866156', addEmail: true, title: "Simultaneous <math><mi>\u03b3</mi></math>-ray and electron spectroscopy of <math><mmultiscripts><mi>Hg</mi><mprescripts/><none/><mrow><mn>182</mn><mo>,</mo><mn>184</mn><mo>,</mo><mn>186</mn></mrow></mmultiscripts></math> isotopes", description: "Background: The mercury isotopes around <math><mrow><mi>N</mi><mo>=</mo><mn>104</mn></mrow></math> are a well-known example of nuclei exhibiting shape coexistence. Mixing of configurations can be studied by measuring the monopole strength <math><mrow><msup><mi>\u03c1</mi><mn>2</mn></msup><mrow><mo>(</mo><mi>E</mi><mn>0</mn><mo>)</mo></mrow></mrow></math>, however, currently the experimental information is scarce and lacks precision, especially for the <math><mrow><msup><mi>I</mi><mi>\u03c0</mi></msup><mo>\u2192</mo><msup><mi>I</mi><mi>\u03c0</mi></msup></mrow></math> (<math><mrow><mi>I</mi><mo>\u2260</mo><mn>0</mn></mrow></math>) transitions.\nPurpose: The goals of this study were to increase the precision of the known branching ratios and internal conversion coefficients, to increase the amount of available information regarding excited states in <math><mmultiscripts><mi>Hg</mi><mprescripts/><none/><mrow><mn>182</mn><mo>,</mo><mn>184</mn><mo>,</mo><mn>186</mn></mrow></mmultiscripts></math>, and to interpret the results in the framework of shape coexistence using different models.\nMethod: The low-energy structures in <math><mmultiscripts><mi>Hg</mi><mprescripts/><none/><mrow><mn>182</mn><mo>,</mo><mn>184</mn><mo>,</mo><mn>186</mn></mrow></mmultiscripts></math> were populated in the <math><mi>\u03b2</mi></math> decay of <math><mmultiscripts><mi>Tl</mi><mprescripts/><none/><mrow><mn>182</mn><mo>,</mo><mn>184</mn><mo>,</mo><mn>186</mn></mrow></mmultiscripts></math>, produced at ISOLDE, CERN and purified by laser ionization and mass separation. The <math><mi>\u03b3</mi></math>-ray and internal conversion electron events were detected by five germanium clover detectors and a segmented silicon detector, respectively, and correlated in time to build decay schemes.\nResults: In total, 193, 178, and 156 transitions, including 144, 140, and 108 observed for the first time in a <math><mi>\u03b2</mi></math>-decay experiment, were assigned to <math><mmultiscripts><mi>Hg</mi><mprescripts/><none/><mrow><mn>182</mn><mo>,</mo><mn>184</mn><mo>,</mo><mn>186</mn></mrow></mmultiscripts></math>, respectively. Internal conversion coefficients were determined for 23 transitions, out of which 12 had an <math><mrow><mi>E</mi><mn>0</mn></mrow></math> component. Extracted branching ratios allowed the sign of the interference term in <math><mmultiscripts><mi>Hg</mi><mprescripts/><none/><mn>182</mn></mmultiscripts></math> as well as <math><mrow><msup><mi>\u03c1</mi><mn>2</mn></msup><mrow><mo>(</mo><mi>E</mi><mn>0</mn><mo>;</mo><msubsup><mn>0</mn><mn>2</mn><mo>+</mo></msubsup><mo>\u2192</mo><msubsup><mn>0</mn><mn>1</mn><mo>+</mo></msubsup><mo>)</mo></mrow></mrow></math> and <math><mrow><mi>B</mi><mo>(</mo><mi>E</mi><mn>2</mn><mo>;</mo><msubsup><mn>0</mn><mn>2</mn><mo>+</mo></msubsup><mo>\u2192</mo><msubsup><mn>2</mn><mn>1</mn><mo>+</mo></msubsup><mo>)</mo></mrow></math> in <math><mmultiscripts><mi>Hg</mi><mprescripts/><none/><mn>184</mn></mmultiscripts></math> to be determined. By means of electron-electron coincidences, the <math><msubsup><mn>0</mn><mn>3</mn><mo>+</mo></msubsup></math> state was identified in <math><mmultiscripts><mi>Hg</mi><mprescripts/><none/><mn>184</mn></mmultiscripts></math>. The experimental results were qualitatively reproduced by five theoretical approaches, the interacting boson model with configuration mixing with two different parametrizations, the general Bohr Hamiltonian, the beyond mean-field model, and the symmetry-conserving configuration-mixing model. However, a quantitative description is lacking.\nConclusions: The presence of shape coexistence in neutron-deficient mercury isotopes was confirmed and evidence for the phenomenon existing at higher energies was found. The new experimental results provide important spectroscopic input for future Coulomb excitation studies." }); // ]]> </script>  </div> </div> <div style="clear:both;margin-bottom: 0;"></div> </div> <div class="bottom-left"></div><div class="bottom-right"></div> </div> </div></div> <footer id="footer" class="pagefooter clearfix">  <div class="pagefooterstripeleft"> CERN Document Server :: <a class="footer" href="https://cds.cern.ch/?ln=en">Search</a> :: <a class="footer" href="https://cds.cern.ch/submit?ln=en">Submit</a> :: <a class="footer" href="https://cds.cern.ch/youraccount/display?ln=en">Personalize</a> :: <a class="footer" href="https://cds.cern.ch/help/?ln=en">Help</a> :: <a class="footer" href="https://cern.service-now.com/service-portal?id=privacy_policy&se=CDS-Service" target="_blank">Privacy Notice</a> :: <a class="footer" href="https://repository.cern/content-policy" target="_blank">Content Policy</a> :: <a class="footer" href="https://repository.cern/terms" target="_blank">Terms and Conditions</a> <br /> Powered by <a class="footer" href="http://invenio-software.org/">Invenio</a> <br /> Maintained by <a class="footer" href="https://cern.service-now.com/service-portal?id=service_element&name=CDS-Service">CDS Service</a> - Need help? 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