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Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> Evidence for a Novel Reaction Mechanism of a Prompt Shock-Induced Fission Following the Fusion of 78Kr and 40Ca Nuclei at E/A =10 MeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&amp;query=Henry%2C+E">E. Henry</a>, <a href="/search/nucl-ex?searchtype=author&amp;query=Toke%2C+J">J. Toke</a>, <a href="/search/nucl-ex?searchtype=author&amp;query=Nyibule%2C+S">S. Nyibule</a>, <a href="/search/nucl-ex?searchtype=author&amp;query=Quinlan%2C+M">M. Quinlan</a>, <a href="/search/nucl-ex?searchtype=author&amp;query=Schroder%2C+W+U">W. U. Schroder</a>, <a href="/search/nucl-ex?searchtype=author&amp;query=Ademard%2C+G">G. Ademard</a>, <a href="/search/nucl-ex?searchtype=author&amp;query=Amorini%2C+F">F. Amorini</a>, <a href="/search/nucl-ex?searchtype=author&amp;query=Auditore%2C+L">L. Auditore</a>, <a href="/search/nucl-ex?searchtype=author&amp;query=Beck%2C+C">C. Beck</a>, <a href="/search/nucl-ex?searchtype=author&amp;query=Berceanu%2C+I">I. Berceanu</a>, <a href="/search/nucl-ex?searchtype=author&amp;query=Bonnet%2C+E">E. Bonnet</a>, <a href="/search/nucl-ex?searchtype=author&amp;query=Borderie%2C+B">B. Borderie</a>, <a href="/search/nucl-ex?searchtype=author&amp;query=Cardella%2C+G">G. Cardella</a>, <a href="/search/nucl-ex?searchtype=author&amp;query=Chbihi%2C+A">A. Chbihi</a>, <a href="/search/nucl-ex?searchtype=author&amp;query=Colonna%2C+M">M. Colonna</a>, <a href="/search/nucl-ex?searchtype=author&amp;query=De+Filippo%2C+E">E. De Filippo</a>, <a href="/search/nucl-ex?searchtype=author&amp;query=DOnofrio%2C+A">A. DOnofrio</a>, <a href="/search/nucl-ex?searchtype=author&amp;query=Frankland%2C+J+D">J. D. Frankland</a>, <a href="/search/nucl-ex?searchtype=author&amp;query=Geraci%2C+E">E. Geraci</a>, <a href="/search/nucl-ex?searchtype=author&amp;query=La+Guidara%2C+E">E. La Guidara</a>, <a href="/search/nucl-ex?searchtype=author&amp;query=La+Commara%2C+M">M. La Commara</a>, <a href="/search/nucl-ex?searchtype=author&amp;query=Lanzalone%2C+G">G. Lanzalone</a>, <a href="/search/nucl-ex?searchtype=author&amp;query=Lautesse%2C+P">P. Lautesse</a>, <a href="/search/nucl-ex?searchtype=author&amp;query=Lebhertz%2C+D">D. Lebhertz</a>, <a href="/search/nucl-ex?searchtype=author&amp;query=Neindre%2C+N+L">N. Le Neindre</a> , et al. (18 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1404.3758v1-abstract-short" style="display: inline;"> An analysis of experimental data from the inverse-kinematics ISODEC experiment on 78Kr+40Ca reaction at a bombarding energy of 10 AMeV has revealed signatures of a hitherto unknown reaction mechanism, intermediate between the classical damped binary collisions and fusion-fission, but also substantially different from what is being termed in the literature as fast fission or quasi fission. These si&hellip; <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1404.3758v1-abstract-full').style.display = 'inline'; document.getElementById('1404.3758v1-abstract-short').style.display = 'none';">&#9661; More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1404.3758v1-abstract-full" style="display: none;"> An analysis of experimental data from the inverse-kinematics ISODEC experiment on 78Kr+40Ca reaction at a bombarding energy of 10 AMeV has revealed signatures of a hitherto unknown reaction mechanism, intermediate between the classical damped binary collisions and fusion-fission, but also substantially different from what is being termed in the literature as fast fission or quasi fission. These signatures point to a scenario where the system fuses transiently while virtually equilibrating mass asymmetry and energy and, yet, keeping part of the energy stored in a collective shock-imparted and, possibly, angular momentum bearing form of excitation. Subsequently the system fissions dynamically along the collision or shock axis with the emerging fragments featuring a broad mass spectrum centered around symmetric fission, relative velocities somewhat higher along the fission axis than in transverse direction, and virtually no intrinsic spin. The class of massasymmetric fission events shows a distinct preference for the more massive fragments to proceed along the beam direction, a characteristic reminiscent of that reported earlier for dynamic fragmentation of projectile-like fragments alone and pointing to the memory of the initial mass and velocity distribution. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1404.3758v1-abstract-full').style.display = 'none'; document.getElementById('1404.3758v1-abstract-short').style.display = 'inline';">&#9651; Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 14 April, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2014. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">5 PAGES, 6 FIGURES</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> UR-NCUR 14-032 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/0804.4696">arXiv:0804.4696</a> <span>&nbsp;[<a href="https://arxiv.org/pdf/0804.4696">pdf</a>, <a href="https://arxiv.org/ps/0804.4696">ps</a>, <a href="https://arxiv.org/format/0804.4696">other</a>]&nbsp;</span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.nima.2008.07.024">10.1016/j.nima.2008.07.024 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A Simple Method for Rise-Time Discrimination of Slow Pulses from Charge-Sensitive Preamplifiers </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&amp;query=T%C3%B5ke%2C+J">Jan T玫ke</a>, <a href="/search/nucl-ex?searchtype=author&amp;query=Quinlan%2C+M+J">Michael J. Quinlan</a>, <a href="/search/nucl-ex?searchtype=author&amp;query=Gawlikowicz%2C+W">Wojtek Gawlikowicz</a>, <a href="/search/nucl-ex?searchtype=author&amp;query=Schr%C3%B6der%2C+W+U">W. Udo Schr枚der</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="0804.4696v1-abstract-short" style="display: inline;"> Performance of a simple method of particle identification via pulse rise time discrimination is demonstrated for slow pulses from charge-sensitive preamplifiers with rise times ranging from 10 ns to 500 ns. The method is based on a comparison of the amplitudes of two pulses, derived from each raw preamplifier pulse with two amplifiers with largely differing shaping times, using a fast peak-sensi&hellip; <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0804.4696v1-abstract-full').style.display = 'inline'; document.getElementById('0804.4696v1-abstract-short').style.display = 'none';">&#9661; More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0804.4696v1-abstract-full" style="display: none;"> Performance of a simple method of particle identification via pulse rise time discrimination is demonstrated for slow pulses from charge-sensitive preamplifiers with rise times ranging from 10 ns to 500 ns. The method is based on a comparison of the amplitudes of two pulses, derived from each raw preamplifier pulse with two amplifiers with largely differing shaping times, using a fast peak-sensing ADC. For the injected charges corresponding to energy deposits in silicon detectors of a few tens of MeV, a rise time resolution of the order of 1 ns can be achieved. The identification method is applicable in particle experiments involving large-area silicon detectors, but is easily adaptable to other detectors with a response corresponding to significantly different pulse rise times for different particle species. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0804.4696v1-abstract-full').style.display = 'none'; document.getElementById('0804.4696v1-abstract-short').style.display = 'inline';">&#9651; Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 29 April, 2008; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2008. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">10 pages, 7 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> UR-NCUR 06-015 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nucl.Instrum.Meth.A595:460-463,2008 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/nucl-ex/0012003">arXiv:nucl-ex/0012003</a> <span>&nbsp;[<a href="https://arxiv.org/pdf/nucl-ex/0012003">pdf</a>, <a href="https://arxiv.org/ps/nucl-ex/0012003">ps</a>, <a href="https://arxiv.org/format/nucl-ex/0012003">other</a>]&nbsp;</span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> Dynamics of Heavy-Ion Collisions at Fermi Energies: Challenges and Opportunities </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&amp;query=Schroeder%2C+W+U">W. Udo Schroeder</a>, <a href="/search/nucl-ex?searchtype=author&amp;query=Toke%2C+J">Jan Toke</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="nucl-ex/0012003v1-abstract-short" style="display: inline;"> The dynamics of heavy-ion reactions at Fermi energies is dominated by a dissipative mechanism modified by the concurrent emission of non-statistical nucleons, light particles, and nuclear clusters. Experimental observables are available to monitor the relaxation processes driving the evolution of an interacting nuclear system towards equilibrium. Isospin degrees of freedom provide interesting ne&hellip; <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('nucl-ex/0012003v1-abstract-full').style.display = 'inline'; document.getElementById('nucl-ex/0012003v1-abstract-short').style.display = 'none';">&#9661; More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="nucl-ex/0012003v1-abstract-full" style="display: none;"> The dynamics of heavy-ion reactions at Fermi energies is dominated by a dissipative mechanism modified by the concurrent emission of non-statistical nucleons, light particles, and nuclear clusters. Experimental observables are available to monitor the relaxation processes driving the evolution of an interacting nuclear system towards equilibrium. Isospin degrees of freedom provide interesting new access to fundamental information on the reaction mechanism and the effective in-medium nucleonic interactions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('nucl-ex/0012003v1-abstract-full').style.display = 'none'; document.getElementById('nucl-ex/0012003v1-abstract-short').style.display = 'inline';">&#9651; Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 14 December, 2000; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2000. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">34 pages, 15 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/nucl-ex/9903011">arXiv:nucl-ex/9903011</a> <span>&nbsp;[<a href="https://arxiv.org/pdf/nucl-ex/9903011">pdf</a>, <a href="https://arxiv.org/ps/nucl-ex/9903011">ps</a>, <a href="https://arxiv.org/format/nucl-ex/9903011">other</a>]&nbsp;</span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.63.024604">10.1103/PhysRevC.63.024604 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Statistical Interpretation of Joint Multiplicity Distributions of Neutrons and Charged Particles </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&amp;query=Toke%2C+J">J. Toke</a>, <a href="/search/nucl-ex?searchtype=author&amp;query=Agnihotri%2C+D+K">D. K. Agnihotri</a>, <a href="/search/nucl-ex?searchtype=author&amp;query=Skulski%2C+W">W. Skulski</a>, <a href="/search/nucl-ex?searchtype=author&amp;query=Schroeder%2C+W+U">W. U. Schroeder</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="nucl-ex/9903011v2-abstract-short" style="display: inline;"> Experimental joint multiplicity distributions of neutrons and charged particles emitted in complex nuclear reactions provide an important test of theoretical models. The method is applied to test three different theoretical models of nuclear multi-fragmentation, two of which fail the test. The measurement of neutrons is decisive in distinguishing between the Berlin and Copenhagen models of nucle&hellip; <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('nucl-ex/9903011v2-abstract-full').style.display = 'inline'; document.getElementById('nucl-ex/9903011v2-abstract-short').style.display = 'none';">&#9661; More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="nucl-ex/9903011v2-abstract-full" style="display: none;"> Experimental joint multiplicity distributions of neutrons and charged particles emitted in complex nuclear reactions provide an important test of theoretical models. The method is applied to test three different theoretical models of nuclear multi-fragmentation, two of which fail the test. The measurement of neutrons is decisive in distinguishing between the Berlin and Copenhagen models of nuclear multi-fragmentation and challenges the interpretation of pseudo- Arrhenius plots. Statistical-model evaporation calculations with GEMINI give a good reproduction first and second moments of the experimental multiplicity correlations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('nucl-ex/9903011v2-abstract-full').style.display = 'none'; document.getElementById('nucl-ex/9903011v2-abstract-short').style.display = 'inline';">&#9651; Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 29 November, 1999; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 23 March, 1999; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 1999. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">12 pages, 3 figures Added GEMINI calculations of multiplicity correlations Added brief discussion of how neutron emission is treated in MMMC</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> UR-NSRL 99-436.1 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys.Rev. C63 (2001) 024604 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/nucl-ex/9811011">arXiv:nucl-ex/9811011</a> <span>&nbsp;[<a href="https://arxiv.org/pdf/nucl-ex/9811011">pdf</a>, <a href="https://arxiv.org/ps/nucl-ex/9811011">ps</a>, <a href="https://arxiv.org/format/nucl-ex/9811011">other</a>]&nbsp;</span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.59.2130">10.1103/PhysRevC.59.2130 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Probing the Concept of Statistical Independence of Intermediate-Mass Fragment Production in Heavy-Ion Collisions </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&amp;query=Skulski%2C+W">W. Skulski</a>, <a href="/search/nucl-ex?searchtype=author&amp;query=Toke%2C+J">J. Toke</a>, <a href="/search/nucl-ex?searchtype=author&amp;query=Schroeder%2C+W+U">W. U. Schroeder</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="nucl-ex/9811011v1-abstract-short" style="display: inline;"> It is found that the total IMF-transverse-energy (E_t) spectra in multi-IMF events are well represented by synthetic spectra obtained by folding of the single-IMF spectrum. Using the experimental IMF multiplicity distribution, the observed trends in the IMF multiplicity distribution for fixed values of E_t are reproduced. The synthetic distributions show binomial reducibility and Arrhenius-like&hellip; <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('nucl-ex/9811011v1-abstract-full').style.display = 'inline'; document.getElementById('nucl-ex/9811011v1-abstract-short').style.display = 'none';">&#9661; More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="nucl-ex/9811011v1-abstract-full" style="display: none;"> It is found that the total IMF-transverse-energy (E_t) spectra in multi-IMF events are well represented by synthetic spectra obtained by folding of the single-IMF spectrum. Using the experimental IMF multiplicity distribution, the observed trends in the IMF multiplicity distribution for fixed values of E_t are reproduced. The synthetic distributions show binomial reducibility and Arrhenius-like scaling, similar to that reported in the literature. Similar results are obtained when the above folding-type synthesis is replaced with one based on mixing events with different IMF multiplicities. For statistically independent IMF emission, the observed binomial reducibility and Arrhenius-type scaling are merely reflections of the shape of the single-IMF transverse-energy spectrum. Hence, a valid interpretation of IMF distributions in terms of a particular production scenario has to explain independently the observed shape of the single-IMF E_t spectrum. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('nucl-ex/9811011v1-abstract-full').style.display = 'none'; document.getElementById('nucl-ex/9811011v1-abstract-short').style.display = 'inline';">&#9651; Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 27 November, 1998; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 1998. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">13 pages with 8 figure</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> UR-NSRL-98-432 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys.Rev. C59 (1999) 2130-2135 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/nucl-ex/9807006">arXiv:nucl-ex/9807006</a> <span>&nbsp;[<a href="https://arxiv.org/pdf/nucl-ex/9807006">pdf</a>]&nbsp;</span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> Rochester Reply to Phair et al. &#34;Evidence for dynamical fragment production?&#34; </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&amp;query=Toke%2C+J">Jan Toke</a>, <a href="/search/nucl-ex?searchtype=author&amp;query=Schroeder%2C+W+U">W. Udo Schroeder</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="nucl-ex/9807006v1-abstract-short" style="display: inline;"> It is shown that the Comment by Phair et al. on PRL 77, 3514 (1996) does not challenge the paper by T&amp;#245;ke et al. It is, in fact, consistent with all conclusions of the targeted paper. The Comment disputes claims never made. </span> <span class="abstract-full has-text-grey-dark mathjax" id="nucl-ex/9807006v1-abstract-full" style="display: none;"> It is shown that the Comment by Phair et al. on PRL 77, 3514 (1996) does not challenge the paper by T&amp;#245;ke et al. It is, in fact, consistent with all conclusions of the targeted paper. The Comment disputes claims never made. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('nucl-ex/9807006v1-abstract-full').style.display = 'none'; document.getElementById('nucl-ex/9807006v1-abstract-short').style.display = 'inline';">&#9651; Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 24 July, 1998; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 1998. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">1 page</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> NSRL-98-429 </p> </li> </ol> <div class="is-hidden-tablet"> <!-- feedback for mobile only --> <span class="help" style="display: inline-block;"><a href="https://github.com/arXiv/arxiv-search/releases">Search 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