Registration of 71Ge rare decays in radiochemical gallium experiments SAGE and BEST

International Conference on Particle Physics and Astrophysics

物理学;天文学

Shikhin, A.A.^1 ; Gavrin, V.N.^1 ; Gorbachev, V.V.^1 ; Ibragimova, T.V.^1 ; Kalikhov, A.V.^1 ; Yants, V.E.^1

Institute for Nuclear Research, Russian Academy of Sciences, prospekt 60-letiya Oktyabrya 7a, Moscow

117312, Russia^1

关键词: Background discrimination;    Base components;    Digital oscilloscope;    Main parameters;    Registration systems;    System electronics;    Total efficiency;    Wide bandwidth;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/798/1/012201/pdf
DOI  :  10.1088/1742-6596/798/1/012201

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

Registration systems of rare events from71Ge decay in radiochemical gallium experiments SAGE and BEST are presented, where miniature proportional counters are used as detectors. The registration of the events is provided by eight counting channels simultaneously in the energy range of 0.4-15 keV which includes the71Ge decays in the region of the L and K peaks with total efficiency up to 75%. Data analysis is based on full charge pulse shape recording using digital oscilloscope. Effective background discrimination is basically obtained due to low noise (100 MHz) of the system electronics. The design and main parameters of base components of the registration systems, description of electronics and comparison of their electrical and counting characteristics are given.