DEVELOPMENT OF A THERMAL SCINTILLATING DETECTOR FOR DOUBLE-BETA DECAY OF CA-48

被引：0

作者：

ALESSANDRELLO, A

BASHKIROV, V

BROFFERIO, C

CAMIN, DV

CREMONESI, O

FIORINI, E

GERVASIO, G

GIULIANI, A

PAVAN, M

PESSINA, GL

PREVITALI, E

ZANOTTI, L

机构：

[1] LAB NAZL GRAN SASSO,LAQUILA,ITALY

[2] NATL INST NUCL PHYS,MILAN,ITALY

[3] MOSCOW ENGN PHYS INST,MOSCOW,USSR

来源：

NUCLEAR PHYSICS B | 1992年

关键词：

D O I：

暂无

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

Among double beta candidates 48Ca stands out for its 4.271 MeV transition energy, well above most of the contribution of natural gamma and beta radioactivity, but extremely near to the energy released in the alpha decay of U-238 (4.274 MeV including nucleus recoil). A CaF2(Eu) detector with both thermal pulse and scintillation light readout would give very good discrimination against this very dangerous source of background. We tested CaF2 crystals with 0.01 to 0.07% Eu doping, in the range of temperature between 300 K and 20 mK. The result shows that detection of the scintillation light from alpha particles of 5.4 MeV with a silicon photodiode is possible down to 20 mK with high signal/noise ratio, and that such doping levels do not affect the performance of CaF2 as a thermal detector.

引用

页码：233 / 235

页数：3

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