Development of a Ge detector array and an in-beam calibration system for highly precise measurement of atomic X-rays

Fujita, Manami; Hosomi, Kenji ; Ishikawa, Yuji*; Kanauchi, H.*; Koike, Takeshi*; Ogura, Yu*; Tamura, Hirokazu; Tanida, Kiyoshi ; Ukai, Mifuyu*; Yamamoto, Takeshi

atomic X-ray spectroscopy is a powerful method of studying the N interaction, for which very limited experimental data are currently available. For this reason, we constructed a germanium (Ge) detector array referred to as Hyperball-X and conducted the first-ever atomic X-ray measurements in 2016 and 2017 at J-PARC. We developed a novel method for in-beam energy calibration of Ge detectors. Three rays (202 keV, 307 keV, and 511 keV) from $^{176}$ Lu in LSO scintillation counters and $^{22}$ Na source were used as reference. The and coincidence detection using the Ge detectors and LSO counters allows for continuous in-beam calibration with this new calibration method, and the calibration uncertainty is reduced to less than 100 eV for energies ranging from 202 to 511 keV.

Language	:	English
Journal	:	Nuclear Instruments and Methods in Physics Research A
Volume	:	1042
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Pages	:	p.167439_1 - 167439_9
Publication Year/Month	:	2022/11
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Paper URL	:	https://doi.org/10.1016/j.nima.2022.167439
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Keywords	:	no keyword
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Registration No. : AA20220878
JAEA Abstracts No. : 51000306
Paper Submission No. : 26271

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