Mernagh J R, Harrison J E, McNeill K G
Phys Med Biol. 1977 Sep;22(5):831-5. doi: 10.1088/0031-9155/22/5/002.
A mehtod of measuring body nitrogen by neutron capture gamma analysis is described. The neutron flux is provided by four collimated 5 Ci Pu-Be sources, placed to give a bilateral irradiation of the subject. The 10-83 MeV thermal neutron capture gamma rays from 14N are detected by two heavily shielded 5 in X 4 in NaI(Tl) detectors. Results indicate a reproducibility +/-3% (1 SD) for a 10 min irradiation of the chest area, while giving a radiation dose equivalent of 50 mREM.
描述了一种通过中子俘获伽马分析测量人体氮的方法。中子通量由四个准直的5居里钚 - 铍源提供，放置方式可对受试者进行双侧照射。来自14N的10 - 83兆电子伏特热中子俘获伽马射线由两个厚屏蔽的5英寸×4英寸碘化钠（铊）探测器探测。结果表明，胸部区域照射10分钟的再现性为±3%（1个标准差），同时给予的辐射剂量当量为50毫雷姆。
