Gupta Ashish, Shareef M, Twisha Munmun, Bhattacharjee Saikat, Mukherjee Gopal, Nayak Satya Samiran, Basu Sansaptak, Dasgupta S, Datta J, Bhattacharyya S, Mukherjee A
Saha Institute of Nuclear Physics, 1/AF, Bidhan Nagar, Kolkata, 700064, India; Homi Bhabha National Institute, Anushaktinagar, Mumbai, 400094, India.
Saha Institute of Nuclear Physics, 1/AF, Bidhan Nagar, Kolkata, 700064, India.
Appl Radiat Isot. 2023 Oct;200:110966. doi: 10.1016/j.apradiso.2023.110966. Epub 2023 Jul 31.
The true coincidence summing correction factor for a Broad Energy Germanium detector has been calculated at far and close geometry set-up using radioactive γ-ray sources. The correction factors were calculated using both experimental and analytical methods. Geant4 simulation was done to calculate the full-energy peak and total efficiencies of the detector. Standard, as well as fabricated mono-energetic γ-ray sources, were used for the γ-ray efficiency measurements. The simulated efficiencies of mono-energetic γ-ray sources were matched to the experimental γ-ray efficiencies by optimizing the detector parameters. The same parameters were used to obtain the full-energy peak and total efficiencies for γ-rays of current interest. Analytical and experimental correction factors were found to agree well with each other. The coincidence summing effect is found to be significant for source-to-detector distances less than 5 cm.
利用放射性γ射线源，在远、近几何设置下计算了宽能锗探测器的真符合相加修正因子。修正因子通过实验和分析方法计算得出。进行了Geant4模拟以计算探测器的全能峰和总效率。标准以及特制的单能γ射线源用于γ射线效率测量。通过优化探测器参数，使单能γ射线源的模拟效率与实验γ射线效率相匹配。使用相同参数获取当前感兴趣的γ射线的全能峰和总效率。发现分析修正因子与实验修正因子吻合良好。发现对于源到探测器距离小于5厘米的情况，符合相加效应显著。
