上海英生正电子湮没寿命谱�?参数-价格-中国粉体罐�/title>

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} }); function showliuyan(me, showtype){ if(showtype==0){ //$("#Content").val($("#Content").attr('placeholder')); Content= document.getElementById('PopMsgFrom').Content.getAttribute('placeholder'); document.getElementById('PopMsgFrom').Content.value=Content; } if(showtype==1){ // $("#Content").val($(me).text()); alert($(me).text()); document.getElementById('PopMsgFrom').Content.value=$(me).text(); } $(".fxp").css("display","flex"); } function close_popwin(){ $(".fxp").css("display","none"); // 关闭虚拟电话后的留言� $(".dhxj").css("display","none"); $(".dhxjbox").css("display", "none"); $(".dhxjbox2").css("display", "none"); return false; } </script>  <div class="cpjs"> <div class="cpjs_tab"> <div class="js_cpjj" style="border-bottom: 3px solid #1479d7; color: #1479d7;">产品介绍</div> <div class="js_cxd">创新炸�/div> <div class="js_xgfa">相关方案</div> <div class="js_xgzl">相关资料</div> <div class="js_yhpl">用户评论</div> <div class="js_gsdt">公司动�?/div> <div class="js_wsj">问商宵�/div> </div> <script> $(function(){ // 切换 $(".cpjs_tab a").click(function(){ $(".cpjs_tab a").css({"color":"#4F5862","border-bottom-color":"transparent"}); $(this).css({"color":"#1479d7","border-bottom-color":"#1479d7"}); }); }); </script>  <div class="cpjj"> <h4 style="box-sizing: border-box; border: 0px; font-size: 24px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline; clear: both; line-height: 1.5; font-family: "Roboto Condensed", sans-serif; white-space: normal; background-color: rgb(255, 255, 255);"><span style="box-sizing: border-box;">[系统简介]</span></h4><p style="box-sizing: border-box; border: 0px; font-size: 12px; margin-top: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline; font-family: Roboto, sans-serif; white-space: normal; background-color: rgb(255, 255, 255);">放射源发射出高能正电子射入物质中后，首先在极短时间内（约10-12ps以下）通过一系列非弹性碰撞减速，损失绝大部分能量至热能，这一过程称为注入与热化。热化后的正电子将在样品中进行无规扩散热运动，晶格中空位、位错等缺陷往往带有等效负电荷，由于库仑引力 正电子容易被这些缺陷捕获而停止扩散，*后将在物质内部与电子发生湮没。从正电子射入物质到发生湮没所经历的时间一般称为正电子寿命。由于湮没是随机的，正电子湮没寿命只能从大量湮没事件统计得出、�/p><h4 style="box-sizing: border-box; border: 0px; font-size: 24px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline; clear: both; line-height: 1.5; font-family: "Roboto Condensed", sans-serif; white-space: normal; background-color: rgb(255, 255, 255);"><span style="box-sizing: border-box;">[系统特征]</span></h4><p style="box-sizing: border-box; border: 0px; font-size: 12px; margin-top: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline; font-family: Roboto, sans-serif; white-space: normal; background-color: rgb(255, 255, 255);">正电子湮没技术对材料的结构相变和原子尺度的缺陷极为敏感，已经成为研究物质微观结构和电子结构的无损的探测分析手段。正电子湮没作为微观分析技术一种，其主要研究范围在于针对原子尺寸的微结构和缺陷。与通常的微观结构分析如STM、SEM、TEM等技术相比，正电子湮没技术不仅可以提供缺陷的尺寸信息、相变信息，而且可以提供缺陷随深度分布的信息，能够深入的分析材料的电子结构以及正电子湮没处的化学环境等，弥补了其他微观探测技术的不足，具有不可替代性、�/p><h4 style="box-sizing: border-box; border: 0px; font-size: 24px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline; clear: both; line-height: 1.5; font-family: "Roboto Condensed", sans-serif; white-space: normal; background-color: rgb(255, 255, 255);">[技术优势]</h4><ol style="box-sizing: border-box; border: 0px; font-size: 12px; margin-bottom: 1.5em; margin-left: 3em; outline: 0px; padding: 0px; vertical-align: baseline; list-style-position: initial; list-style-image: initial; font-family: Roboto, sans-serif; white-space: normal; background-color: rgb(255, 255, 255);" class=" list-paddingleft-2"><li><p>他对样品材料的种类几乎没有什么限制，可以是固体、液体或气体，可以是金属、半导体、绝缘体或高分子材料，可以是单晶、多晶或液晶等，适用于凡是与材料的电子密度及动量有关的问题、�/p></li><li><p>对样品温度没有限制，可以跨越材料的熔点或凝固点，而信息又是通过贯穿能力很强的γ射线携带而来，因此可以对样品做高低温的动态原位测量，测量时可施加电场、磁场、高气压、真空等特殊环境、�/p></li><li><p>研究样品中原子尺度的缺陷，如晶格中缺少一个或多个原子的缺陷，这些缺陷在电镜、X衍射中研究颇为困难、�/p></li><li><p>简单使用，室温测量下的PAT制样方法</p></li></ol><h4 style="box-sizing: border-box; border: 0px; font-size: 24px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline; clear: both; line-height: 1.5; font-family: "Roboto Condensed", sans-serif; white-space: normal; background-color: rgb(255, 255, 255);">[应用领域]</h4><p style="box-sizing: border-box; border: 0px; font-size: 12px; margin-top: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline; font-family: Roboto, sans-serif; white-space: normal; background-color: rgb(255, 255, 255);">金属材料的形变、疲劳、淬火、辐照、掺杂、氢损伤等在材料中造成的空位、位错、空位团等缺陷以及研究这些缺陷的退火效应、�/p><p style="box-sizing: border-box; border: 0px; font-size: 12px; margin-top: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline; font-family: Roboto, sans-serif; white-space: normal; background-color: rgb(255, 255, 255);">材料中相变过程，如合金中的沉淀现象、马氏体相变、非晶态材料中的晶化过程、离子固体中的相变、液晶及其他高分子材料，聚合物中的相变，凝聚态物理等</p><p style="box-sizing: border-box; border: 0px; font-size: 12px; margin-top: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline; font-family: Roboto, sans-serif; white-space: normal; background-color: rgb(255, 255, 255);">研究固体的能带结构、费米面、空位形成能筈�/p><p style="box-sizing: border-box; border: 0px; font-size: 12px; margin-top: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline; font-family: Roboto, sans-serif; white-space: normal; background-color: rgb(255, 255, 255);">研究材料的表面和表层结构和缺陷、�/p><p><br/></p> </div>  <div class="cxd"> <div class="cxd_tit"><span></span>创新炸�/div> <p style=" color: #333; font-size: 14px; margin: 10px 0 0; line-height: 26px;"> 暂无数据� </p> </div>  <div class="xgfa"> <div class="xgfa_tit"> <div> <span></span>相关方案 </div> </div> <div class="xgfa_box" style="display: block;"><div style="padding:10px;">暂无相关方案、�/div> </div> </div> <script> $(function(){ // 切换 $(".xgfa_tit_ul li").hover(function(){ $(".xgfa_tit_ul li").css({"color":"#4F5862","border-bottom-color":"transparent"}); $(this).css({"color":"#1479d7","border-bottom-color":"#1479d7"}); var _index = $(this).index(); $(".xgfa_box").css("display","none"); $(".xgfa_box").eq(_index).css("display","block"); }); }); </script>  <div class="xgzl"> <div class="cxd_tit"><span></span>相关资料</div> <div class="xgzl_box"><div style="padding:10px;">暂无数据、�/div> </div> </div>  <div class="yhpl"> <div class="cxd_tit"><span></span>用户评论</div> <form id="FormComments" action="" method="post" onsubmit="return false"> <input name="SaveProComments" id="SaveProComments" type="hidden" value="yes" /> <input name="ProductID" id="ProductID" type="hidden" value="326257" /> <input name="ProQuality" id="ProQuality" type="hidden" value="10" /> <input name="ProService" id="ProService" type="hidden" value="10" /> <input name="ProUsability" id="ProUsability" type="hidden" value="10" /> <input name="ProCostperformance" id="ProCostperformance" type="hidden" value="10" /> <div class="yhpl_pf"> <div> <p>产品质量</p> <div><span id="Quality" class="stars star10"></span><span id="Quality_Val" class="ScoreVal" curScore="10">10刅�/span></div> </div> <div> <p>售后服务</p> <div><span id="Service" class="stars star10"></span><span id="Service_Val" class="ScoreVal" curScore="10">10刅�/span></div> </div> <div> <p>易用�?/p> <div><span id="Usability" class="stars star10"></span><span id="Usability_Val" class="ScoreVal" curScore="10">10刅�/span></div> </div> <div> <p>性价毓�/p> <div><span id="Costperformance" class="stars star10"></span><span id="Costperformance_Val" class="ScoreVal" curScore="10">10刅�/span></div> </div> </div> <div class="yhpl_pftit">评论内容</div> <textarea name="Comments" id="ProComments" onfocus="checklogin();" placeholder="分享产品使用经验/采购评价（不超过500字）">