Defect and Diffusion Forum Vol. 373

<!DOCTYPE html> <html lang="en" dir="ltr"> <head> <meta name="format-detection" content="telephone=no"> <meta name="viewport" content="width=device-width, initial-scale=1.0" /> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="description" content="Some theoretical aspects, practical results and experimental techniques of use of the positron annihilation phenomena in the research of the structure, defects of structure and other properties of different materials and mediums are covered in this journal volume. It comprises the papers presented at the 17th International Conference on Positron Annihilation (ICPA-17, Wuhan, China, 20-25 September, 2015)." /> <link rel="canonical" href="https://www.scientific.net/DDF.373" /> <meta property="og:title" content="Defect and Diffusion Forum Vol. 373 | Scientific.Net" /> <meta property="og:type" content="website" /> <meta property="og:url" content="https://www.scientific.net/DDF.373" /> <meta property="og:image" content="/Content/app/scinet5/images/metadata_logo.png" /> <meta property="og:image:type" content="image/png" /> <meta property="og:image:width" content="261" /> <meta property="og:image:height" content="260" /> <meta property="og:image:alt" content="Scientific.Net Logo" /> <title>Defect and Diffusion Forum Vol. 373 | Scientific.Net</title> <link href="/Content/app/scinet5/images/favicon.ico" rel="shortcut icon" /> <link href="/Content/public.min.css?v=BKBihgCkUm340JBGsNjEPtWz8I22CUsubMPC3V1WYzw" rel="stylesheet" /> <link rel="preconnect" href="https://www.google-analytics.com"> <link rel="preconnect" href="https://www.gstatic.com"> <link rel="preconnect" href="https://www.googletagmanager.com"> <link rel="icon" href="/Content/app/scinet5/images/favicon.ico"> <link rel="apple-touch-icon" href="/Content/app/scinet5/images/apple-touch-icon.png"> <link rel="preconnect" href="https://fonts.googleapis.com"> <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin> <link href="https://fonts.googleapis.com/css?family=Open+Sans+Condensed:300,700%7COpen+Sans:300i,400,400i,600,600i,700&display=swap" rel="stylesheet">    <script> (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start': new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0], j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src= 'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f); })(window,document,'script','dataLayer','GTM-T3VDKWV');</script>  </head> <body> <noscript>  <iframe src="https://www.googletagmanager.com/ns.html?id=GTM-T3VDKWV" height="0" width="0" style="display:none;visibility:hidden"></iframe> </noscript> <div class="sc-content-container"> <div class="sc-content"> <div class="header-menu-container"> <div class="identity-menu-container header-menu-container-not-logged-in"> <div class="container"> <div class="row"> <ul class="role-menu"> <li class="user-menu between normal-user-menu"> <div class="hdivider-100"></div> <div class="cart-info"> <a href="https://main.scientific.net/Payment/Cart"> <i class="inline-icon cart-icon-white"></i> <span id="cartInfoTotalItemsCount"></span> </a> </div> <div class="user-menu-login-or-register"> <a href="https://main.scientific.net/Account/Registration?ReturnUrl=https%3A%2F%2Fwww.scientific.net%2FDDF.373" rel="nofollow"> Registration </a> <a href="https://main.scientific.net/Account/Login?ReturnUrl=https%3A%2F%2Fwww.scientific.net%2FDDF.373" rel="nofollow"> Log In </a> </div> </li> </ul> </div> </div> </div> <div class="header-fluid"> <div class="container"> <div class="row"> <div class="block-header"> <div class="logo-block"> <a href="/" class="application-logo inline-icon logo-icon"></a> <div class="burger-menu-button visible-xs"> <div class="hamburger-box"> <div class="hamburger-inner"></div> </div> </div> </div> <div class="menu-and-search-block"> <div class="burger-menu"> <nav class="burger-menu-items"> <div class="public-menu"> <ul> <li><a href="/ForLibraries">For Libraries</a></li> <li><a href="/ForPublication/Paper">For Publication</a></li> <li><a href="/DocuCenter">Downloads</a></li> <li><a href="/news/all">News</a></li> <li><a href="/Home/AboutUs">About Us</a></li> <li><a href="/Home/Contacts">Contact Us</a></li> </ul> </div> </nav> </div> <div class="header-menu-top"> <div class="header-menu-list"> <a href="/ForLibraries">For Libraries</a> <a href="/ForPublication/Paper">For Publication</a> <a href="/DocuCenter">Downloads</a> <a href="/news/all">News</a> <a href="/Home/AboutUs">About Us</a> <a href="/Home/Contacts">Contact Us</a> </div> </div> <div class="search-block"> <input class="search-control" type="search" placeholder="Search" data-url="/Search"> <button class="button button-95 button-grey search-btn button-simple"> <span class="hidden-xs">Search</span> <i class="inline-icon search-icon-grey visible-xs"></i> </button> </div> </div> </div> </div> </div> </div> </div> <div class="container-fluid"> <div class="row"> <div class="banner-new"></div> </div> </div> <div class="content"> <div class="container"> <div class="row content-container"> <div class="left-content col-md-4 col-sm-5"> <div class="left-content-first-line icon-container mobile-collapse-button"> <div class="page-name-block underline-begin sibling-name-block"> <div class="page-name-block-text"> Volumes <a class="left-content-expand-button"><i class="inline-icon arrow-right-black no-hover-icon on-focus-arrow-down-black"></i></a> </div> </div> </div> <div class="row mobile-collapse-content"> <a href="/DDF.379" class="normal-large-text icon-container"> <div class="element-list"> <div class="element-list-text"> Defect and Diffusion Forum <br /> <span class="paper-volume-number">Vol. 379</span> </div> <div class="element-list-arrow"> <i class="inline-icon arrow-right-black no-focus-icon on-hover-arrow-left-red"></i> </div> </div> </a> <a href="/DDF.378" class="normal-large-text icon-container"> <div class="element-list"> <div class="element-list-text"> Defect and Diffusion Forum <br /> <span class="paper-volume-number">Vol. 378</span> </div> <div class="element-list-arrow"> <i class="inline-icon arrow-right-black no-focus-icon on-hover-arrow-left-red"></i> </div> </div> </a> <a href="/DDF.377" class="normal-large-text icon-container"> <div class="element-list"> <div class="element-list-text"> Defect and Diffusion Forum <br /> <span class="paper-volume-number">Vol. 377</span> </div> <div class="element-list-arrow"> <i class="inline-icon arrow-right-black no-focus-icon on-hover-arrow-left-red"></i> </div> </div> </a> <a href="/DDF.376" class="normal-large-text icon-container"> <div class="element-list"> <div class="element-list-text"> Defect and Diffusion Forum <br /> <span class="paper-volume-number">Vol. 376</span> </div> <div class="element-list-arrow"> <i class="inline-icon arrow-right-black no-focus-icon on-hover-arrow-left-red"></i> </div> </div> </a> <a href="/DDF.375" class="normal-large-text icon-container"> <div class="element-list"> <div class="element-list-text"> Defect and Diffusion Forum <br /> <span class="paper-volume-number">Vol. 375</span> </div> <div class="element-list-arrow"> <i class="inline-icon arrow-right-black no-focus-icon on-hover-arrow-left-red"></i> </div> </div> </a> <a href="/DDF.374" class="normal-large-text icon-container"> <div class="element-list"> <div class="element-list-text"> Defect and Diffusion Forum <br /> <span class="paper-volume-number">Vol. 374</span> </div> <div class="element-list-arrow"> <i class="inline-icon arrow-right-black no-focus-icon on-hover-arrow-left-red"></i> </div> </div> </a> <a href="/DDF.373" class="normal-large-text icon-container active-element active"> <div class="element-list"> <div class="element-list-text"> Defect and Diffusion Forum <br /> <span class="paper-volume-number">Vol. 373</span> </div> <div class="element-list-arrow"> <i class="inline-icon arrow-right-black no-focus-icon on-hover-arrow-left-red"></i> </div> </div> </a> <a href="/DDF.372" class="normal-large-text icon-container"> <div class="element-list"> <div class="element-list-text"> Defect and Diffusion Forum <br /> <span class="paper-volume-number">Vol. 372</span> </div> <div class="element-list-arrow"> <i class="inline-icon arrow-right-black no-focus-icon on-hover-arrow-left-red"></i> </div> </div> </a> <a href="/DDF.371" class="normal-large-text icon-container"> <div class="element-list"> <div class="element-list-text"> Defect and Diffusion Forum <br /> <span class="paper-volume-number">Vol. 371</span> </div> <div class="element-list-arrow"> <i class="inline-icon arrow-right-black no-focus-icon on-hover-arrow-left-red"></i> </div> </div> </a> <a href="/DDF.370" class="normal-large-text icon-container"> <div class="element-list"> <div class="element-list-text"> Defect and Diffusion Forum <br /> <span class="paper-volume-number">Vol. 370</span> </div> <div class="element-list-arrow"> <i class="inline-icon arrow-right-black no-focus-icon on-hover-arrow-left-red"></i> </div> </div> </a> <a href="/DDF.369" class="normal-large-text icon-container"> <div class="element-list"> <div class="element-list-text"> Defect and Diffusion Forum <br /> <span class="paper-volume-number">Vol. 369</span> </div> <div class="element-list-arrow"> <i class="inline-icon arrow-right-black no-focus-icon on-hover-arrow-left-red"></i> </div> </div> </a> <a href="/DDF.368" class="normal-large-text icon-container"> <div class="element-list"> <div class="element-list-text"> Defect and Diffusion Forum <br /> <span class="paper-volume-number">Vol. 368</span> </div> <div class="element-list-arrow"> <i class="inline-icon arrow-right-black no-focus-icon on-hover-arrow-left-red"></i> </div> </div> </a> <a href="/DDF.367" class="normal-large-text icon-container"> <div class="element-list"> <div class="element-list-text"> Defect and Diffusion Forum <br /> <span class="paper-volume-number">Vol. 367</span> </div> <div class="element-list-arrow"> <i class="inline-icon arrow-right-black no-focus-icon on-hover-arrow-left-red"></i> </div> </div> </a> </div> </div> <div class="right-content col-md-8 col-sm-7 col-xs-12"> <div class="bread-crumbs hidden-xs"> <a class="bread-crumbs-first" href="/">Home</a><i class="inline-icon arrow-breadcrumbs"></i><a class="bread-crumbs-first" href="/DDF">Defect and Diffusion Forum</a><i class="inline-icon arrow-breadcrumbs"></i><span class="bread-crumbs-second">Defect and Diffusion Forum Vol. 373</span></div> <div class="page-name-block underline-begin"> <h1 class="page-name-block-text">Defect and Diffusion Forum Vol. 373</h1> </div> <div class="clearfix title-details"> <div class="papers-block-info col-lg-12"> <div class="row"> <div class="info-row-name normal-text-gray col-md-2 col-sm-3 col-xs-4"> <div class="row"> <p>DOI:</p> </div> </div> <div class="info-row-content semibold-middle-text col-md-10 col-sm-9 col-xs-8"> <div class="row"> <p><a href="https://doi.org/10.4028/www.scientific.net/DDF.373">https://doi.org/10.4028/www.scientific.net/DDF.373</a></p> </div> </div> </div> </div> <div id="titleMarcXmlLink" style="display: none" class="papers-block-info col-lg-12"> <div class="row"> <div class="info-row-name normal-text-gray col-md-2 col-sm-3 col-xs-4"> <div class="row"> <p>Export:</p> </div> </div> <div class="info-row-content semibold-middle-text col-md-10 col-sm-9 col-xs-8"> <div class="row"> <p><a href="/DDF.373/marc.xml">MARCXML</a></p> </div> </div> </div> </div> <div class="papers-block-info col-lg-12"> <div class="row"> <div class="info-row-name normal-text-gray col-md-2 col-sm-3 col-xs-4"> <div class="row"> <p>ToC:</p> </div> </div> <div class="info-row-content semibold-middle-text col-md-10 col-sm-9 col-xs-8"> <div class="row"> <p><a href="/DDF.373_toc.pdf">Table of Contents</a></p> </div> </div> </div> </div> </div> <div class="volume-tabs"> </div> <div class=""> <div class="volume-papers-page"> <div class="block-search-pagination clearfix"> <div class="block-search-volume"> <input id="paper-search" type="search" placeholder="Search" maxlength="65"> </div> <div class="pagination-container"><ul class="pagination"><li class="active"><span>1</span></li><li><a href="/DDF.373/2">2</a></li><li><a href="/DDF.373/3">3</a></li><li><a href="/DDF.373/4">4</a></li><li><a href="/DDF.373/5">5</a></li><li class="PagedList-ellipses"><a class="PagedList-skipToNext" href="/DDF.373/6" rel="next">…</a></li><li class="PagedList-skipToNext"><a href="/DDF.373/2" rel="next">></a></li><li class="PagedList-skipToLast"><a href="/DDF.373/7">>></a></li></ul></div> </div> <div class="block-volume-title normal-text-gray"> <p> Paper Title <span>Page</span> </p> </div> <div class="item-block"> <div class="item-link"> <a href="/DDF.373.-9">Preface, Committees, Sponsors</a> </div> </div> <div class="item-block"> <div class="item-link"> <a href="/DDF.373.3">The Science Enjoyed by Professor Alec T. Stewart</a> </div> <div class="item-link volume-authors"> <div class="semibold-middle-text"> Authors: Toshio Hyodo </div> </div> <div id="abstractTextBlock498591" class="volume-info volume-info-text volume-info-description"> Abstract: Late Professor Stewart initiated and shaped the International Conference on Positron Annihilation (ICPA) series. As a first-generation experimental positron-annihilation scientist, he made full use of the angular correlation of annihilation radiation (ACAR) method. He applied this method to study Fermi surfaces of metals, positron wave-functions in crystals, positron-electron and -phonon many-body interactions, and the vacancy formation energy in solids. He also studied with this method positronium in liquids and solids (T. Hyodo, J. Phys. Conf. Series, 618 (2015) 012002). All these studies enjoyed by Professor Stewart will long be remembered by the positron study community. </div> <div> <a data-readmore="{ block: '#abstractTextBlock498591', lines: 2, expandText: '...more', collapseText: '...less' }"></a> </div> <div class="page-number semibold-large-text"> 3 </div> </div> <div class="item-block"> <div class="item-link"> <a href="/DDF.373.11">Positron Manipulation and Positronium Laser Excitation in AEgIS</a> </div> <div class="item-link volume-authors"> <div class="semibold-middle-text"> Authors: Sebastiano Mariazzi, Ruggero Caravita, Stefano Aghion, Claude Amsler, Akitaka Ariga, Tomoko Ariga, Germano Bonomi, Philippe Bräunig, Johan Bremer, Roberto S. Brusa, Luis Cabaret, Massimo Caccia, Fabrizio Castelli, G. Cerchiari, Karl Chlouba, Simone Cialdi, Daniel Comparat, Giovanni Consolati, Andrea Demetrio, Lea di Noto, Michael Doser, Alexey Dudarev, Antonio Ereditato, Craig Evans, Rafael Ferragut, Julian Fesel, Andrea Fontana, Ola K. Forslund, Sebastian Gerber, Marco Giammarchi, Angela Gligorova, Sergei Gninenko, Francesco Guatieri, Stefan Haider, Helga Holmestad, Torkjell Huse, Ine L. Jernelv, Elena Jordan, Thomas Kaltenbacher, Alban Kellerbauer, Mitsuhiro Kimura, Torsten Koetting, Daniel Krasnicky, Vittorio Lagomarsino, Pierre Lansonneur, Patrice Lebrun, Sebastian Lehner, Joanna Liberadzka, Chloe Malbrunot, Lisa Marx, Viktor Matveev, Zeudi Mazzotta, Giancarlo Nebbia, Patrick Nedelec, Markus Oberthaler, Nicola Pacifico, Davide Pagano, Luca Penasa, Vojtech Petracek, Ciro Pistillo, Francesco Prelz, Marco Prevedelli, Luca Ravelli, Laura Resch, Benjamin Rienäcker, Ole M. Røhne, Stefan Rosenberger, Alberto Rotondi, Michele Sacerdoti, Heidi Sandaker, Romualdo Santoro, Paola Scampoli, Fiodor Sorrentino, Michal Spacek, James Storey, Izabela M. Strojek, Gemma Testera, Ingmari Tietje, Stefan Vamosi, Eberhard Widmann, Pauline Yzombard, Sandra Zavatarelli, Johann Zmeskal </div> </div> <div id="abstractTextBlock495192" class="volume-info volume-info-text volume-info-description"> Abstract: Production of antihydrogen by using the charge exchange reaction, as proposed by AEgIS (Antimatter Experiment: gravity, Interferometry, Spectroscopy), requires the formation of a dense cloud of positronium atoms excited to Rydberg states. In this work, the recent advances in AEgIS towards this result are described. Namely, the manipulation of positrons to produce bunches containing more than 10<sup>8</sup> particles and the laser excitation of positronium to Rydberg states, using n=3 as intermediate level, are presented. </div> <div> <a data-readmore="{ block: '#abstractTextBlock495192', lines: 2, expandText: '...more', collapseText: '...less' }"></a> </div> <div class="page-number semibold-large-text"> 11 </div> </div> <div class="item-block"> <div class="item-link"> <a href="/DDF.373.17">Enegretics of the Ps Formation: Role of the Solvated Electron</a> </div> <div class="item-link volume-authors"> <div class="semibold-middle-text"> Authors: Sergey V. Stepanov, Vsevolod Byakov, Dmitry Zvezhinskiy, Gilles Duplâtre </div> </div> <div id="abstractTextBlock494839" class="volume-info volume-info-text volume-info-description"> Abstract: Taking liquid water as an example, we have considered energetics of the positronium formation. It is shown that quasi-free Ps as well as the Ps localized in a bubble cannot decay into hydrated electron and positron. The most probable value of the positron work function in water, <i>V</i><sub>0</sub><sup>+</sup>, is 1.5…2 eV. Ps formation from the hydrated electron and positron is energetically possible. By the end of thermalization major fraction of positrons escapes the blob and hydrates outside. The low-mobile е<sup>+</sup><i><sub>aq</sub></i> has no time to diffuse back and form Ps with intrablob e-. These е<sup>+</sup><i><sub>aq</sub></i> mostly annihilate as “free positrons”. Positrons, which are thermalized within the blob, recombine with the quasi-free intrablob electrons and form Ps. </div> <div> <a data-readmore="{ block: '#abstractTextBlock494839', lines: 2, expandText: '...more', collapseText: '...less' }"></a> </div> <div class="page-number semibold-large-text"> 17 </div> </div> <div class="item-block"> <div class="item-link"> <a href="/DDF.373.23">Low-Energy Ps-Xe Scattering Analyzed Using a Modified Effective Range Theory</a> </div> <div class="item-link volume-authors"> <div class="semibold-middle-text"> Authors: Kengo Shibuya, Haruo Saito </div> </div> <div id="abstractTextBlock496051" class="volume-info volume-info-text volume-info-description"> Abstract: We have investigated positronium‒xenon collisions at energies below 100 meV to find a strong temperature dependences of the annihilation rates. A partial wave analysis based on a modified effective range theory (MERT) is tested to explain the temperature dependences and to find significant contributions of the<i> p</i>-wave scattering component. The fact that MERT works well for analyzing positronium‒xenon collisions indicates that positronium is polarized during the collisions as proposed by other theoretical and experimental researchers. </div> <div> <a data-readmore="{ block: '#abstractTextBlock496051', lines: 2, expandText: '...more', collapseText: '...less' }"></a> </div> <div class="page-number semibold-large-text"> 23 </div> </div> <div class="item-block"> <div class="item-link"> <a href="/DDF.373.31">Positron Lifetime Calculation for Plastic Deformed Nanocrystalline Copper</a> </div> <div class="item-link volume-authors"> <div class="semibold-middle-text"> Authors: Kai Zhou, Ting Zhang </div> </div> <div id="abstractTextBlock495951" class="volume-info volume-info-text volume-info-description"> Abstract: Positron lifetime calculation has been performed on a computer-generated nanocrystalline copper with a mean grain size of 9.1 nm during its deformation. For the undeformed and deformed nanocrystalline copper, calculated positron lifetimes are around 157 ps which come from the positron annihilation in the free volume in grain boundaries. Due to the grain-boundary deformation mechanism, no vacancies or vacancy clusters will be induced in grains during the plastic deformation of the nanocrystalline copper, which is different to the deformation of the conventional polycrystal. From this point of view, <i>in-situ</i> positron annihilation measurements can provide important experimental information on the deformation mechanism of nanocrystalline metals. </div> <div> <a data-readmore="{ block: '#abstractTextBlock495951', lines: 2, expandText: '...more', collapseText: '...less' }"></a> </div> <div class="page-number semibold-large-text"> 31 </div> </div> <div class="item-block"> <div class="item-link"> <a href="/DDF.373.35">Parameter-Free Gradient Correction for Positron States in Oxides</a> </div> <div class="item-link volume-authors"> <div class="semibold-middle-text"> Authors: Jan Kuriplach, Bernardo Barbiellini </div> </div> <div id="abstractTextBlock497514" class="volume-info volume-info-text volume-info-description"> Abstract: Recently, the theory of gradient-corrected electron-positron correlations in solids was improved and extended in order to avoid the adjustable, empirical parameter α which is now part of theory and a smooth function of the electron density.This new, parameter-free approach is applied to selected oxides in order to discuss their interstitial space morphology reflected by the positron charge distribution. In addition, the positron lifetime and affinity are calculated using a highly precise computational method. An attempt is made to correlate these quantities with the volume of the reduced formula unit.The results for some oxides - such as Li-ion battery cathode materials and high temperature superconductors - are discussed in detail and prospects for future experiments are given. </div> <div> <a data-readmore="{ block: '#abstractTextBlock497514', lines: 2, expandText: '...more', collapseText: '...less' }"></a> </div> <div class="page-number semibold-large-text"> 35 </div> </div> <div class="item-block"> <div class="item-link"> <a href="/DDF.373.41">First-Principles Calculation of Defect Formation and Positron Annihilation States in Bi<sub>2</sub>Te<sub>3</sub></a> </div> <div class="item-link volume-authors"> <div class="semibold-middle-text"> Authors: Bin Zhao, Bo Zhou, Chong Yang Li, Ning Qi, Zhi Quan Chen </div> </div> <div id="abstractTextBlock511353" class="volume-info volume-info-text volume-info-description"> Abstract: Defect formation energy in Bi<sub>2</sub>Te<sub>3</sub> thermoelectric material was calculated using a first principles approach based on the Density Functional Theory (DFT). For vacancy-type defect, the Te1 vacancy (V<sub>Te1</sub>) is the most stable defect with low formation energy in both Bi-rich and Te-rich conditions, which indicates that the Te1 vacancies have higher probability to be formed. For antisite defects, the formation energy of Bi<sub>Te1</sub> is much lower than that of Bi<sub>Te2</sub> in Bi-rich condition, while in Te-rich condition it is beneficial for Te<sub>Bi</sub> with lower formation energy. Positron wave function distribution and positron lifetimes of different annihilation states in Bi<sub>2</sub>Te<sub>3</sub> were also calculated using the atomic superposition (ATSUP) method. The positron bulk lifetime in Bi<sub>2</sub>Te<sub>3</sub> is about 231 ps, and for the neutral vacancy-type defects without relaxation, the positron lifetimes of V<sub>Bi</sub>, V<sub>Te1</sub> and V<sub>Te2 </sub>are 275 ps, 295 ps and 269 ps, respectively. </div> <div> <a data-readmore="{ block: '#abstractTextBlock511353', lines: 2, expandText: '...more', collapseText: '...less' }"></a> </div> <div class="page-number semibold-large-text"> 41 </div> </div> <div class="item-block"> <div class="item-link"> <a href="/DDF.373.46">First-Principles Study on Positron States at Li-Adsorbed Al(100) Surfaces: Effect of Electron-Positron Correlation</a> </div> <div class="item-link volume-authors"> <div class="semibold-middle-text"> Authors: Satoshi Hagiwara, Yasumitsu Suzuki, Kazuyuki Watanabe </div> </div> <div id="abstractTextBlock494744" class="volume-info volume-info-text volume-info-description"> Abstract: We investigated positron states at Li-adsorbed Al(100) surfaces using \textit{ab-initio} two-component density functional theory. The results thus obtained by using semi-local electron-positron (e-p) correlation functionals with the generalized gradient approximation well reproduce the experimental results, showing that reliable e-p correlation functionals are needed to properly describe the various properties of positron surface state. </div> <div> <a data-readmore="{ block: '#abstractTextBlock494744', lines: 2, expandText: '...more', collapseText: '...less' }"></a> </div> <div class="page-number semibold-large-text"> 46 </div> </div> <div class="item-block"> <div class="item-link"> <a href="/DDF.373.53">Simulation Study of Positron Beam Generation via Irradiating an Ultra-Intense Laser on a Hollow Target</a> </div> <div class="item-link volume-authors"> <div class="semibold-middle-text"> Authors: Jian Xun Liu, Yan Yun Ma, Jun Zhao, Tong Pu Yu, Xiao Hu Yang, Wei Quan Wang, Jing Jiang </div> </div> <div id="abstractTextBlock494821" class="volume-info volume-info-text volume-info-description"> Abstract: By simulation with the relativistic PIC code EPOCH, it is found that a hollow target ismore beneficial than a plane one for the collimation and compression of the positrons. Irradiating anultra-intense laser (4×10<sup>23 </sup>W/cm<sup>2</sup>) on a hollow target, 8.74×10<sup>15</sup> positrons are generated. Due tothe focusing effect of the transverse electric field formed in the hollow wall, the divergence angle isaround 21° , while the maximum density of the beam is 4.77×10<sup>21 </sup>cm<sup>-3</sup>. When the laser intensity is doubled, both the yield (5.31 ×10<sup>16</sup>) and the maximum density (1.57 ×10<sup>22 </sup>cm<sup>-3</sup>) are greatly increased while the beam divergence gets even smaller (15.7 °). </div> <div> <a data-readmore="{ block: '#abstractTextBlock494821', lines: 2, expandText: '...more', collapseText: '...less' }"></a> </div> <div class="page-number semibold-large-text"> 53 </div> </div> <div class="block-bottom-pagination"> <div class="pager-info"> <p>Showing 1 to 10 of 68 Paper Titles</p> </div> <div class="pagination-container"><ul class="pagination"><li class="active"><span>1</span></li><li><a href="/DDF.373/2">2</a></li><li><a href="/DDF.373/3">3</a></li><li><a href="/DDF.373/4">4</a></li><li><a href="/DDF.373/5">5</a></li><li class="PagedList-ellipses"><a class="PagedList-skipToNext" href="/DDF.373/6" rel="next">…</a></li><li class="PagedList-skipToNext"><a href="/DDF.373/2" rel="next">></a></li><li class="PagedList-skipToLast"><a href="/DDF.373/7">>></a></li></ul></div> </div> </div> </div> </div> </div> </div> </div> <div class="social-icon-popup"> <a href="https://www.facebook.com/Scientific.Net.Ltd/" target="_blank" rel="noopener" title="Scientific.Net"><i class="inline-icon facebook-popup-icon social-icon"></i></a> <a href="https://twitter.com/Scientific_Net/" target="_blank" rel="noopener" title="Scientific.Net"><i class="inline-icon twitter-popup-icon social-icon"></i></a> <a href="https://www.linkedin.com/company/scientificnet/" target="_blank" rel="noopener" title="Scientific.Net"><i class="inline-icon linkedin-popup-icon social-icon"></i></a> </div> </div> <div class="sc-footer"> <div class="footer-fluid"> <div class="container"> <div class="row"> <div class="footer-menu col-md-12 col-sm-12 col-xs-12"> <ul class="list-inline menu-font"> <li><a href="/ForLibraries">For Libraries</a></li> <li><a href="/ForPublication/Paper">For Publication</a></li> <li><a href="/insights" target="_blank">Insights</a></li> <li><a href="/DocuCenter">Downloads</a></li> <li><a href="/Home/AboutUs">About Us</a></li> <li><a href="/PolicyAndEthics/PublishingPolicies">Policy & Ethics</a></li> <li><a href="/Home/Contacts">Contact Us</a></li> <li><a href="/Home/Imprint">Imprint</a></li> <li><a href="/Home/PrivacyPolicy">Privacy Policy</a></li> <li><a href="/Home/Sitemap">Sitemap</a></li> <li><a href="/Conferences">All Conferences</a></li> <li><a href="/special-issues">All Special Issues</a></li> <li><a href="/news/all">All News</a></li> <li><a href="/read-and-publish-agreements">Read & Publish Agreements</a></li> </ul> </div> </div> </div> </div> <div class="line-footer"></div> <div class="footer-fluid"> <div class="container"> <div class="row"> <div class="col-xs-12"> <a href="https://www.facebook.com/Scientific.Net.Ltd/" target="_blank" rel="noopener" title="Scientific.Net"><i class="inline-icon facebook-footer-icon social-icon"></i></a> <a href="https://twitter.com/Scientific_Net/" target="_blank" rel="noopener" title="Scientific.Net"><i class="inline-icon twitter-footer-icon social-icon"></i></a> <a href="https://www.linkedin.com/company/scientificnet/" target="_blank" rel="noopener" title="Scientific.Net"><i class="inline-icon linkedin-footer-icon social-icon"></i></a> </div> </div> </div> </div> <div class="line-footer"></div> <div class="footer-fluid"> <div class="container"> <div class="row"> <div class="col-xs-12 footer-copyright"> <p> © 2024 Trans Tech Publications Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies. For open access content, terms of the Creative Commons licensing CC-BY are applied. <br />Scientific.Net is a registered trademark of Trans Tech Publications Ltd. </p> </div> </div> </div> </div> </div> <a class="scrollTop inline-icon scroll-top-icon" href="#" style="display: none"></a> </div> <script src="/Scripts/public.min.js?v=BtSq2PJEHRTW2PekpQGgIQKs7-OSPiKhsoI9rMs6kTU"></script> <script> $(function () { $("#paper-search").autocomplete({ minLength: 1, source: '/Title/Search?kurzel=DDF&volumeBegin=373&volumeEnd=373', delay: 200, select: function (event, ui) { window.location.href = ui.item.url; } }); }); </script> <script asp-render-component-scripts> $(function () { $.get("/Title/ShowMarcXmlLink") .done(function (showMarcXmlLink) { if (showMarcXmlLink) { $("#titleMarcXmlLink").show(); } }); }); Scinet.public = (function () { function loadCartInfo(onLoad) { var formatCartItemCount = function (count) { var format = (count > 1 || count === 0) ? "{0} items" : "{0} item"; $("#cartInfoTotalItemsCount").html(Scinet.stringFormat(format, count)); }, cookieCartItemCount = Cookies.get("Scinet5.CartItemsCount"); if (onLoad && cookieCartItemCount != null) { formatCartItemCount(parseInt(cookieCartItemCount, 10)); } else { $.ajax({ url: "/Cart/GetItemsCount", cache: false }) .done( function (count) { Cookies.set("Scinet5.CartItemsCount", count, { domain: ".scientific.net", secure: true }); formatCartItemCount(count); }); } } return { loadCartInfo: loadCartInfo }; })(); $(function () { Scinet.public.loadCartInfo(true); $("[data-add-book-to-cart]").on("click", function (e) { e.preventDefault(); var data = $(this).data("add-book-to-cart"); console.log(data); var url = "/Cart/AddBook"; $.post(url, data) .done( function () { Scinet.public.loadCartInfo(); $("#addToCart").modal(); }) .fail( function (xhr) { Scinet.error(xhr.responseText); }); }) }); </script> <script> var $buoop = { required: { e: 11, f: -6, o: -6, s: -3, c: -6 }, insecure: false, unsupported: false, api: 2019.11, reminder: 0, onshow: function () { window.browserUpdateOutdated = true; } }; function $buo_f() { var e = document.createElement("script"); e.src = "//browser-update.org/update.min.js"; document.body.appendChild(e); }; try { document.addEventListener("DOMContentLoaded", $buo_f, false) } catch (e) { window.attachEvent("onload", $buo_f) } </script>   <script> window.clientErrorLogActionUrl = "/Errors/LogClientError"; </script> </body> </html>

CINXE.COM

Defect and Diffusion Forum Vol. 373 | Scientific.Net