Scintillation efficiency of nuclear recoils in a CaF2(Eu) crystal for Dark Matter search

被引：128

作者：

Hazama, R. ^{[1
,2
]}

Ajimura, S. ^{[1
]}

Hayakawa, H. ^{[1
]}

Matsuoka, K. ^{[1
]}

Miyawaki, H. ^{[1
]}

Morikubo, K. ^{[1
]}

Suzuki, N. ^{[1
]}

Kishimoto, T. ^{[1
]}

机构：

[1] Department of Physics and Laboratory of Nuclear Studies, Osaka University, Toyonaka Osaka 560-0043, Japan

[2] Department of Physics, Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, WA 98195, United States

来源：

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2002年 / 481卷 / 1-3期

基金：

日本学术振兴会;

关键词：

Calcium compounds - Doping (additives) - Neutron beams - Quenching - Scintillation;

D O I：

10.1016/S0168-9002(01)01263-3

中图分类号：

学科分类号：

摘要：

The scintillation efficiency (quenching factor) of fluorine and calcium nuclei recoiling in a CaF2(Eu) crystal was measured in an energy region relevant to Dark Matter searches. The recoiling nuclei were obtained via the 19F(n,n′) and 40Ca(n,n′) reactions, where the neutron beam was provided via the d(d,n)3He reaction. The quenching factor of F and Ca nuclei in the CaF2(Eu) crystal was found to be 11-20%, and 9-23% relative to the electron equivalent energy for 53-192keV and 25-91keV recoil energies, respectively, and the energy dependence was observed. The quenching factor we measured here is a little larger than that of previous studies, which may depend on the Eu doping concentration of the crystal. © 2002 Elsevier Science B.V. All rights reserved.

引用

页码：297 / 303