Energy loss of monoenergetic positrons passing through a thin carbon foil

被引：3

作者：

Yang, B. ^{[1
]}

Ng, C. K. ^{[1
]}

Ling, C. C. ^{[1
]}

Fung, S. ^{[1
]}

机构：

[1] Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2012年 / 270卷

关键词：

Positrons; Energy loss straggling; Stopping power; STOPPING POWER; ELECTRONS;

D O I：

10.1016/j.nimb.2011.10.004

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

In this paper, the measurements of energy loss and energy loss straggling for 1-10 key monoenergetic positrons passing through thin carbon foils of different thicknesses ranging from 1.0 to 5.0 mu g/cm(2) are presented. The stopping power dE/dx and positron transmission coefficient as a function of incident positron energy and foil thickness have also been investigated. Particularly, the experimental results obtained are compared with those from Monte Carlo simulation and theory with a view to providing a way to determine the actual thickness of a carbon foil. The ratio of the energy straggling to the foil thickness seems to have a linear relation with the beam energy. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：9 / 11

页数：3

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