Measurement of the response of heat-and-ionization germanium detectors to nuclear recoils
Measurement of the response of heat-and-ionization germanium detectors to nuclear recoils
复制标题
热电离锗探测器对核反冲响应的测量
DOI：
10.1016/j.nima.2007.04.118
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发表时间：
2006
影响因子：
1.4
通讯作者：
M. Stern
中科院分区：
文献类型：
--
作者：
A. Benoit;L. Bergé;J. Blumer;A. Broniatowski;B. Censier;A. Chantelauze;M.Chapellier;G. Chardin;S. Collin;X. Defay;M. Jésus;H. Deschamps;P. D. Stefano;Y. Dolgorouky;L. Dumoulin;K. Eitel;M. Fesquet;S. Fiorucci;J. Gascon;G. Gerbier;C. Goldbach;M. Gros;M. Horn;A. Juillard;R. Lemrani;A. Lesquen;M. Luca;S. Marnieros;L. Mosca;X. Navick;G. Nollez;E. Olivieri;P. Pari;V. Sanglard;L. Schoeffel;F. Schwamm;M. Stern
测量了Edelweiss合作所使用的热电离锗测辐射热计的热猝灭因子Q‘(由等能量的核反冲和电子反冲产生的热信号之比)。解释了这一因素如何影响在中子源刻度中观察到的能量标度和有效猝灭因子。这种有效的猝灭效应等于Q/Q‘，其中Q是电离产额的猝灭因子。为了测量Q‘，对Q/Q’的精确Edelweiss测量与在标记中子束实验中对这一量的所有可用测量进行回顾而得到的Q值相结合。详细讨论了该方法评定Q‘的系统不确定度。对于20到100keV的反冲能量，由此产生的热猝灭因子为Q‘=0.91±0.03±0.04，其中两个误差分别是Q和Q/Q’测量的贡献。目前对Q值的汇编和对Q‘的评估代表了用于直接搜索WIMP暗物质的任何探测器的绝对能量标度的最精确确定之一。
The heat quenching factor Q′(the ratio of the heat signals produced by nuclear and electron recoils of equal energy) of the heat-and-ionization germanium bolometers used by the EDELWEISS collaboration has been measured. It is explained how this factor affects the energy scale and the effective quenching factor observed in calibrations with neutron sources. This effective quenching effect is found to be equal to Q/Q′, where Q is the quenching factor of the ionization yield. To measure Q′, a precise EDELWEISS measurement of Q/Q′is combined with values of Q obtained from a review of all available measurements of this quantity in tagged neutron beam experiments. The systematic uncertainties associated with this method to evaluate Q′are discussed in detail. For recoil energies between 20 and 100keV, the resulting heat quenching factor is Q′=0.91±0.03±0.04, where the two errors are the contributions from the Q and Q/Q′measurements, respectively. The present compilation of Q values and evaluation of Q′represent one of the most precise determinations of the absolute energy scale for any detector used in direct searches for WIMP dark matter.