Production and decay of the 73Ge*(1/2-) metastable state in a low-background germanium detector

被引：3

作者：

Liao, H. Y. ^{[1
,2
]}

Chang, H. M. ^{[1
,2
]}

Chou, M. H. ^{[1
]}

Deniz, M. ^{[1
,3
]}

Huang, H. X. ^{[1
,4
]}

Lee, F. S. ^{[1
]}

Li, H. B. ^{[1
]}

Li, J. ^{[5
,6
]}

Lin, C. W. ^{[1
]}

Lin, F. K. ^{[1
]}

Lin, S. K. ^{[1
]}

Lin, S. T. ^{[1
]}

Singh, V. ^{[1
]}

Wong, H. T. ^{[1
]}

Wu, S. C. ^{[1
]}

机构：

[1] Acad Sinica, Inst Phys, Taipei 115, Taiwan

[2] Natl Taiwan Univ, Dept Phys, Taipei 106, Taiwan

[3] Middle E Tech Univ, Dept Phys, TR-06531 Ankara, Turkey

[4] Inst Atom Energy, Dept Nucl Phys, Beijing 102413, Peoples R China

[5] Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China

[6] Tsinghua Univ, Dept Engn Phys, Beijing 100084, Peoples R China

来源：

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS | 2008年 / 35卷 / 07期

关键词：

D O I：

10.1088/0954-3899/35/7/077001

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The Ge-73*(1/2(-)) metastable state decays with a very characteristic signature which allows it to be tagged event-by-event. Studies were performed using data taken with a high-purity germanium detector in a low-background laboratory near a nuclear power reactor core where the (nu) over bar (e) flux was 6.4 x 10(12) cm(-2) s(-1). The measured average and equilibrium production rates of Ge-73*(1/2-) were (8.7 +/- 0.4) and (6.7 +/- 0.3) kg(-1) day(-1), respectively. The production channels were studied and identified. By studying the difference in the production of 73Ge*(1/2-) between the reactor ON and OFF spectra, limiting sensitivities in the range of similar to 10(-42) to 10(-43) cm(2) for the cross sections of neutrino-induced nuclear transitions were derived. The dominant backgrounds are due to beta(-) decays of cosmic-ray-induced Ga-73. The prospects of enhancing the sensitivities at underground locations are discussed.

引用

页数：14

共 4 条

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