2008/01/31 by H. Liao, TEXONO Collaboration, H.-M. Chang +14
Chemistry · Physics and Astronomy · #Atomic physics #Chemistry #Dark Matter and Cosmic Phenomena #Decay scheme #Detector #Gamma ray #Germanium #Isotopes of germanium #Metastability #Neutrino Physics Research #Nuclear isomer #Nuclear physics #Optics #Optoelectronics #Particle physics theoretical and experimental studies #Physics #Radiochemistry #Semiconductor detector #Silicon #nucl-ex
paper · pdf · doi:10.1088/0954-3899/35/7/077001
published as J.Phys.G35:077001,2008 · 16 pages, 10 figures
openalex publication_date 2008/05/14 · arxiv created 2008/05/15 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The 73 Ge ∗ (1/2 − ) metastable states decay with a very characteristic signature which allow them 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 ¯νe-flux was 6.4 × 1012 cm−2s−1. The measured average and equilibrium production rates of 73Ge ∗ (1/2−) were (8.7 ± 0.4) and (6.7 ± 0.3) kg−1day−1, respectively. The production channels were studied and identified. By studying the difference in the production of 73 Ge ∗ (1/2 −) between the reactor ON and OFF spectra, the limiting sensitivities at the range of ∼ 10 −42 − 10 −43 cm 2 for the cross-sections of neutrino-induced nuclear transitions were derived. The dominant background are due to β-decays of cosmic-ray induced 73 Ga. The prospects of enhancing the sensitivities at underground locations are discussed. PACS numbers: 14.60.Lm, 13.15.+g, 5.30.Pt.2