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論文

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

藤田 真奈美; 細見 健二; 石川 勇二*; 叶内 萌香*; 小池 武志*; 小椋 裕*; 田村 裕和; 谷田 聖; 鵜養 美冬*; 山本 剛史

Nuclear Instruments and Methods in Physics Research A, 1042, p.167439_1 - 167439_9, 2022/11

 被引用回数:1 パーセンタイル:56.43(Instruments & Instrumentation)

$$Xi^-$$ atomic X-ray spectroscopy is a powerful method of studying the $$Xi$$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 $$Xi^-$$ 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 $$gamma$$ rays (202 keV, 307 keV, and 511 keV) from $$^{176}$$Lu in LSO scintillation counters and $$^{22}$$Na source were used as reference. The $$beta-gamma$$ and $$gamma-gamma$$ 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 $$pm$$100 eV for energies ranging from 202 to 511 keV.

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