학술논문
The energy calibration system for CANDLES using (n, \gamma) reaction
Document Type
Working Paper
Author
Iida, T.; Mizukoshi, K.; Ohata, T.; Uehara, T.; Batpurev, T.; Chan, W. M.; Fushimi, K.; Hazama, R.; Ishikawa, M.; Kakubata, H.; Kanagawa, K.; Katagiri, S.; Khai, B. T.; Kishimoto, T.; Li, X.; Maeda, T.; Matsuoka, K.; Morishita, K.; Moser, M.; Nakajima, K.; Nomachi, M.; Ogawa, I.; Shokati, M.; Suzuki, K.; Takemoto, Y.; Takihira, Y.; Tamagawa, Y.; Tetsuno, K.; Trang, V. T. T.; Umehara, S.; Yoshida, S.
Source
Subject
Language
Abstract
CAlcium fluoride for the study of Neutrinos and Dark matters by Low-energy Spectrometer (CANDLES) searches for neutrino-less double beta decay of $^{48}$Ca using a CaF$_2$ scintillator array. A high Q-value of $^{48}$Ca at 4,272 keV enabled us to achieve very low background condition, however, at the same it causes difficulties in calibrating the detector's Q-value region because of the absence of a standard high-energy $\gamma$-ray source. Therefore, we have developed a novel calibration system based on $\gamma$-ray emission by neutron capture on $^{28}$Si, $^{56}$Fe and $^{58}$Ni nuclei. In the paper, we report the development of the new calibration system as well as the results of energy calibration in CANDLES up to 9 MeV.
Comment: 6 pages, 7 figures
Comment: 6 pages, 7 figures