Performance of an in-situ alpha spectrometer

被引：3
|
作者：
Pollanen, R. [1 ]
机构：
[1] STUK Radiat & Nucl Safety Author, POB 14, FI-00881 Helsinki, Finland
来源：
APPLIED RADIATION AND ISOTOPES | 2016年 / 109卷
关键词：
In-situ alpha spectrometry; Silicon detector; Detection efficiency; RESOLUTION;
D O I：
10.1016/j.apradiso.2015.11.110
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Equipment was recently developed for detecting alpha particles from flat and smooth surfaces with good energy resolution at ambient air pressure. In this work, the detection efficiencies were determined using different extended-area sources emitting alpha and beta radiation and a mixed nuclide point source emitting alpha radiation. Beta particles are of importance because they can also be detected. Counts originating from alpha and beta particles are mainly at different energies, which make their separation possible. An efficiency of 0.14 was determined for an extended-area (> 30 cm(2)) homogeneous source emitting alpha radiation at the energy of 5-6 MeV, whereas for the beta emitters the efficiencies were 0.07-0.19 depending on the beta-particle emission energies. The use of a collimator reduces the detection efficiencies by a factor of up to ten. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：193 / 197
页数：5
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