Effective measurement radius of underwater γ spectrometer
10.3969/j.issn.1009-0754.2025.07.020
- VernacularTitle:水下γ谱仪有效测量半径理论研究
- Author:
Kai ZHANG
1
;
Yifang YANG
;
Haijun WANG
;
Zhentao WANG
;
Zhiyu TANG
Author Information
1. 200433 上海,海军特色医学中心
- Keywords:
Lanthanum bromide detector;
Effective measurement radius;
Underwater
- From:
Journal of Navy Medicine
2025;46(7):751-755
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study the shielding effect of water body on γ spectrometer during underwater measurements.Methods A mathematical model of water immersion was constructed for the 3-inch(ф76.2 mm×76.2 mm)lanthanum bromide detector.The totipotent peak count rate of 10 typical γ characteristic energies under different radius water sphere conditions was calculated by MCNP software,and the relationship was established.Results The effective radii of γ photons of different energies based on the 3-inch lanthanum bromide detector was obtained.The relation of energy and effective radius was established,and the effective radius of Tl-208@2614keV was 102.99 cm.Conclusion The quantitative relationship between photons of different energies of a typical 3-inch lanthanum bromide detector and effective radius had been established theoretically,which provides a theoretical basis for measuring and analyzing radioactive water body by γ spectrometer.
