ALPHA PARTICLE REGISTRATION IN PLASTICS AND ITS APPLICATIONS FOR RADON AND NEUTRON PERSONNEL DOSIMETRY

被引:42
作者
BECKER, K
机构
[1] Health Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN
来源
HEALTH PHYSICS | 1969年 / 16卷 / 02期
关键词
D O I
10.1097/00004032-196902000-00001
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The number and size of visible α particle tracks in different cellulose derivatives (nitrate, acetate, acetobutyrate, and propionate) and other polymer foils depends mainly on the chemical structure and physical treatment of the foils, the presence or absence of oxygen during irradiation, the humidity and/or chemical pre- or post-treatment of the foils, and on the etching conditions. The stability of unetched tracks decreases close to the softening temperature of the plastics. Up to 100°C the fading in the investigated foils is small. Cellulose derivates are most suitable for several applications, such as (a) simple and inexpensive personnel dosimetry of radon and radon daughters in uranium mines; (b) thermal neutron dosimetry using (n, α) reactions in B, Li, etc.; (c) fast neutron measurements via (n, α) reactions and recoil reactions in the foil. The sensitivity of this method is superior to the fission fragment registration above ca. 1 MeV, but there is a directional dependence up to -30%. Very high energy neutrons can also be measured via spallation in high-Z cover materials. Some depth-dose measurements for neutrons of different energies are reported. © 1969 Health Physics Society.
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页码:113 / +
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