Enhanced ballistic phonon production for surface events in cryogenic silicon detector

被引：30

作者：

Clarke, RM ^{[1
]}

Brink, PL ^{[1
]}

Cabrera, B ^{[1
]}

Colling, P ^{[1
]}

Crisler, MB ^{[1
]}

Davies, AK ^{[1
]}

Eichblatt, S ^{[1
]}

Gaitskell, RJ ^{[1
]}

Hellmig, J ^{[1
]}

Martinis, JM ^{[1
]}

Nam, SW ^{[1
]}

Saab, T ^{[1
]}

Young, BA ^{[1
]}

机构：

[1] Stanford Univ, Dept Phys, Stanford, CA 94305 USA

来源：

APPLIED PHYSICS LETTERS | 2000年 / 76卷 / 20期

关键词：

D O I：

10.1063/1.126529

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present evidence of an enhanced ballistic phonon component resulting from surface events in a 100 g silicon cryogenic dark matter detector. Surface events, calibrated using a C-14 electron source, were found to have faster rise times (similar to 5 mu s) than bulk gamma and neutron events (similar to 7 mu s). Using this effect, we were able to discriminate bulk nuclear recoil events from a surface electron background at better than the 97% level above 25 keV recoil energy. The phonon risetime for bulk gamma events was dependent on the applied voltage, confirming that phonons produced from electron-hole emission are ballistic. (C) 2000 American Institute of Physics. [S0003-6951(00)05020-8].

引用

页码：2958 / 2960

页数：3

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