Self-attenuation corrections calculated by LabSOCS Simulations forgamma-spectrometric measurements with HPGe detectors

• Published in: 中国物理C：英文版 2014 (7), p.82-87
• Main Author: 田自宁 欧阳晓平 刘洋 陈亮 刘金良 张显鹏 宋纪文 曾鸣
• Format: Article
• Language: English
• Subjects: 光谱测量; 半经验公式; 吸收介质; 校正因子; 模拟计算; 衰减; 软件仿真; 高纯锗探测器
• ISSN: 1674-1137; 0254-3052

Simulations from Laboratory Sourceless Object Counting System （LabSOCS） software were used to determine self-attenuation correction factor, which is defined as the efficiency ratio of the sample with the absorbing medium to that of the sample without absorbing medium. The semi-empirical self-attenuation correction formula F（μ） used to correct self-attenuation of a sample was applied. A comparison of the two methods reveals that formula of sample with φb75 mm× 25 mm and φ75 min×10 mm can be, respectively, used in the self-attenuation correction for p in the ranges of 0 to 0.5 cm-1 and 0.5 cm-1 to 2.0 cm-1, indicating that the semi-empirical formula will not be used when # has exceeded the interval. The semi-empirical formula value is consistent with the experimental value, within 7.9% accuracy. Therefore, this method is correct and effective. Both of our two methods can accurately produce a relative self-attenuation correction factor when the composition of the sample is known. The self-attenuation correction of a sample with unknown composition can only be carried out using a semi-empirical formula method.