通过仪器中子活化分析测量氮时导致本底的因素研究。

Investigation of factors which lead to the background in the measurement of nitrogen by IVNAA.

作者信息

McNeill K G, Borovnicar D J, Krishnan S S, Wang H Y, Waana C, Harrison J E

机构信息

Department of Physics, University of Toronto, Ontario, Canada.

出版信息

Phys Med Biol. 1989 Jan;34(1):53-9. doi: 10.1088/0031-9155/34/1/005.

DOI:10.1088/0031-9155/34/1/005

PMID:2928378

Abstract

A major problem in the measurement of nitrogen in the body by in vivo neutron activation analysis is the size of the background. Investigations show that random summing of gamma rays in the range 4-7 MeV is a major contributor. By direct comparison, 252Cf is shown to be a better neutron source than Pu-Be in this regard. Data are presented on the contribution to the background of water and chloride in the body.

摘要

通过体内中子活化分析测量人体氮含量时的一个主要问题是本底的大小。研究表明，4 - 7兆电子伏范围内伽马射线的随机求和是本底的主要来源。通过直接比较表明，在这方面，²⁵²Cf是比钚 - 铍更好的中子源。给出了关于人体中水和氯化物对本底贡献的数据。