物理化学学报 >> 1991, Vol. 7 >> Issue (04): 425-429.doi: 10.3866/PKU.WHXB19910410

研究论文 上一篇    下一篇

正电子湮没与沸石内静电场

高滋; 杨雪敏; 王煜   

  1. 复旦大学化学系，上海 200433；复旦大学物理系
  • 收稿日期:1990-04-02 修回日期:1990-10-04 发布日期:1991-08-15
  • 通讯作者: 高滋

Positron Annihilation and Electrostatic Field in Zeolites

Gao Zi; Yang Xue-Min; Wang Yu   

  1. Department of Chemistry, Fudan University, Shanghai 200433; Department of Physics, Fudan University
  • Received:1990-04-02 Revised:1990-10-04 Published:1991-08-15
  • Contact: Gao Zi

PDF

2476

赞

摘要： 本文测定了不同类型沸石的正电子寿命谱。发现o-Ps的湮没寿命, 与沸石静电场之间有良好的对应关系, 静电场愈强, 湮没寿命愈短。根据正电子寿命谱结果。含不同阳离子的Y沸石的静电场强弱次序为KY

关键词: 正电子湮没谱, 沸石, 静电场, 孔径

Abstract: Positron annihilation measurements have been carried ont for Y zeolites with different types of cations, faujasites with different Si/Al ratios and zeolites with different structures. The o-Ps annihilation lifetimes are closely correlated with the variations of the electrostatic field in the zeolites. The o-Ps lifetimes are shortened when the electrostatic field in the zeolites is increased. Positron annihilation data show that the electrostatic field of cation-exchanged Y zeolites varies in the order of KY

Key words: Positron annililation spectroscopy, Zeolites, Electrostatic field, Pore size