Shima Yosuke, Hayashi Hiroaki, Kojima Yasuaki, Jyousyou Ryouta, Shibata Michihiro
Department of Materials, Physics and Energy Engineering, Nagoya University, Nagoya 464-8603, Japan.
Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8509, Japan.
Appl Radiat Isot. 2016 Mar;109:535-538. doi: 10.1016/j.apradiso.2015.11.035. Epub 2015 Nov 29.
In order to determine the γ-ray emission intensities of nuclei far from the β-stability line with HPGe detectors under large solid-angle geometry, coincidence summing corrections should be performed, even if full energy peak efficiencies of detectors are accurately measured with standard sources. Because the summing effects depend on decay schemes and emission intensities, the correction needs to be iterated several times starting from the initial values of intensities obtained directly from the measured peak counts of γ-rays. Considering (134)Cs, (154)Eu and (56)Co as typical examples, we discuss the number of iterations of summing correction required for self-consistency with respect to the total efficiencies of the detectors.
为了在大立体角几何条件下用高纯锗探测器测定远离β稳定线的核的γ射线发射强度，即使探测器的全能峰效率已用标准源精确测量，也应进行符合相加修正。由于相加效应取决于衰变纲图和发射强度，因此需要从直接由γ射线测量峰计数得到的强度初始值开始，多次迭代进行修正。以(134)Cs、(154)Eu和(56)Co为例，我们讨论了为使探测器总效率自洽所需的相加修正迭代次数。
