POSITRON-ANNIHILATION IN KAPTON SOURCE-SUPPORTING FOILS

被引：31

作者：

MONGE, MA

DELRIO, J

机构：

[1] Dept. de Fisica de Mater., Univ. Complutense de Madrid

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1994年 / 6卷 / 13期

关键词：

D O I：

10.1088/0953-8984/6/13/021

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The fraction of positrons annihilated in the Kapton support of a positron source has been measured as a function of the atomic number, Z, of the sample studied. The data have been filtered by both exponential and logarithmic laws obtained from a backscattering model. Two formulas are given to correct the source contribution in a positron lifetime experiment. The results shown that the exponential fit is satisfactory for low atomic numbers while a logarithmic fit is better for Z > 30.

引用

页码：2643 / 2646

页数：4

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