首页> 外文期刊>Applied Surface Science >Depth-dependent positron annihilation in different polymers
【24h】

Depth-dependent positron annihilation in different polymers

机译:不同聚合物中依赖深度的正电子an灭

获取原文
获取原文并翻译 | 示例
           

摘要

Depth-dependent positron annihilation Doppler broadening measurements were conducted for polymers with different chemical compositions. Variations of the S parameter with respect to incident positron energy were observed. For pure hydrocarbons PP, HDPE and oxygen-containing polymer PC, S parameter rises with increasing positron implantation depth. While for PI and fluoropolymers like PTFE, ETFE and PVF, S parameter decreases with higher positron energy. For chlorine-containing polymer PVDC, S parameter remains nearly constant at all incident positron energies. It is suggested that these three variation trends are resulted from a competitive effect between the depth-dependent positronium formation and the influence of highly electronegative atoms on positron annihilation characteristics.
机译:对具有不同化学组成的聚合物进行了深度依赖的正电子an灭多普勒展宽测量。观察到S参数相对于入射正电子能量的变化。对于纯烃PP,HDPE和含氧聚合物PC,S参数随正电子注入深度的增加而增加。对于PI和含氟聚合物(如PTFE,ETFE和PVF),S参数随正电子能量的增加而降低。对于含氯聚合物PVDC,在所有入射正电子能量下,S参数几乎保持恒定。提示这三个变化趋势是由深度依赖的正电子形成与高负电性原子对正电子hil灭特性的影响之间的竞争效应引起的。

著录项

  • 来源
    《Applied Surface Science》 |2013年第1期|109-112|共4页
  • 作者单位

    Key Laboratory of Nuclear Analysis Techniques, Institute of High Energy Physics, Chinese Academy of Sciences, No. 19 Yuquan Lu, Beijing 100049, China;

    Key Laboratory of Nuclear Analysis Techniques, Institute of High Energy Physics, Chinese Academy of Sciences, No. 19 Yuquan Lu, Beijing 100049, China;

    Key Laboratory of Nuclear Analysis Techniques, Institute of High Energy Physics, Chinese Academy of Sciences, No. 19 Yuquan Lu, Beijing 100049, China;

    Key Laboratory of Nuclear Analysis Techniques, Institute of High Energy Physics, Chinese Academy of Sciences, No. 19 Yuquan Lu, Beijing 100049, China;

    Key Laboratory of Nuclear Analysis Techniques, Institute of High Energy Physics, Chinese Academy of Sciences, No. 19 Yuquan Lu, Beijing 100049, China;

    Key Laboratory of Nuclear Analysis Techniques, Institute of High Energy Physics, Chinese Academy of Sciences, No. 19 Yuquan Lu, Beijing 100049, China;

    Key Laboratory of Nuclear Analysis Techniques, Institute of High Energy Physics, Chinese Academy of Sciences, No. 19 Yuquan Lu, Beijing 100049, China;

    Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, No. 19 Yuquan Lu, Beijing 100049, China;

    Key Laboratory of Nuclear Analysis Techniques, Institute of High Energy Physics, Chinese Academy of Sciences, No. 19 Yuquan Lu, Beijing 100049, China;

    Key Laboratory of Nuclear Analysis Techniques, Institute of High Energy Physics, Chinese Academy of Sciences, No. 19 Yuquan Lu, Beijing 100049, China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Positron annihilation; Doppler broadening; Polymer; Atomic electronegativity;

    机译:正电子ni灭;多普勒增宽;聚合物;原子电负性;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号