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Study of a generalized birks formula for the scintillation response of a CaMoO4 crystal

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Title
Study of a generalized birks formula for the scintillation response of a CaMoO4 crystal
Author(s)
Lee J.Y.; Kim H.J.; Kang S.J.; Moo Hyun Lee
Publication Date
2017-12
Journal
JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.71, no.12, pp.928 - 933
Publisher
KOREAN PHYSICAL SOC
Abstract
We have investigated the scintillation characteristics of CaMoO4 (CMO) crystals by using a gamma source and various internal alpha sources. A 137Cs source with 662-keV gamma-rays was used for the gamma-quanta light yield calibration. Internal radioactive contaminations provided alpha particles with different energies from 5.41 to 7.88 MeV. We developed a C++ program based on the ROOT package for the fitting of parameters in a generalized Birks semi-empirical formula by combining the experimental and the simulation data. Results for the fitted Birks parameters are kb1 = 3.3 × 10 −3 (g/MeVcm2) for the 1st parameter and kb2 = 7.9 × 10 −5 (g/MeVcm2)2 for the 2nd parameter. The χ2/n.d.f. (Number of Degree of Freedom) is calculated as 0.1/4. We were able to estimate the 238U and 234U contaminations in a CMO crystal by using the generalized Birks semi-empirical formula. © 2017, The Korean Physical Society
URI
https://pr.ibs.re.kr/handle/8788114/4747
ISSN
0374-4884
Appears in Collections:
Center for Underground Physics(지하실험 연구단) > Journal Papers (저널논문)
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