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

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Date

2008-07-01

Author

Liao, H. Y.
Chang, H. M.
Chou, M. H.
Deniz, M.
Huang, H. X.
Lee, F. S.
Li, H. B.
Li, J.
Lin, C. W.
Lin, F. K.
Lin, S. K.
Lin, S. T.
Singh, V.
Wong, H. T.
Wu, S. C.

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The (73)Ge*(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 (73)Ge*(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 (73)Ga. The prospects of enhancing the sensitivities at underground locations are discussed.

Subject Keywords

Nuclear and High Energy Physics

URI

https://hdl.handle.net/11511/68602

Journal

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS

DOI

https://doi.org/10.1088/0954-3899/35/7/077001

Collections

Department of Physics, Article

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Citation Formats

H. Y. Liao et al., “Production and decay of the (73)Ge*(1/2(-)) metastable state in a low-background germanium detector,” JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS, pp. 0–0, 2008, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/68602.