EFFECTS OF TARGET TEMPERATURE ON ANALYTICAL SENSITIVITIES OF COLD-NEUTRON CAPTURE PROMPT GAMMA-RAY ACTIVATION-ANALYSIS

被引：19
|
作者：
MACKEY, EA
机构：
[1] National Institute of Standards and Technology, Inorganic Analytical Research Division, Technology Administration, Gaithersburg, Maryland
来源：
BIOLOGICAL TRACE ELEMENT RESEARCH | 1994年 / 43-5卷
关键词：
PROMPT GAMMA-RAY NEUTRON ACTIVATION ANALYSIS; COLD NEUTRONS; NEUTRON SCATTERING; TARGET TEMPERATURE AND SENSITIVITY;
D O I：
10.1007/BF02917305
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
Cold-neutron prompt gamma-ray activation analysis sensitivities are often decreased because of an increase in the average neutron energy on scattering within room temperature targets. Experiments were performed to determine whether target cooling would alleviate these effects. Cooling the targets to 77 K increased hydrogen sensitivity by as much as 25%. Target cooling decreases those effects of neutron scattering on CNPGAA sensitivities that are the result of an increased average neutron energy. However, cold-neutron scattering may also change the average path length traveled, and this effect on sensitivity is not alleviated by controlling temperature.
引用
收藏
页码：103 / 108
页数：6
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