2011/04/29 by P. Belli, R. Bernabei, F. Cappella +13 · 1 citation
Chemistry · Physics and Astronomy · #Analytical Chemistry (journal) #BETA (programming language) #Beta decay #Chemistry #Chromatography #Double beta decay #Gamma ray #Gamma ray spectrometer #Gamma ray spectrometry #Mass spectrometry #Neutrino #Neutrino Physics Research #Nuclear physics #Nuclear physics research studies #Optics #Physics #Platinum #Radioactive Decay and Measurement Techniques #Radiochemistry #Spectrometer #nucl-ex
paper · pdf · doi:10.1140/epja/i2011-11091-6
published as Eur. Phys. J. A 47 (2011) 91 · 13 pages, 6 figures, 2 tables
arxiv created 2011/04/29 · openalex publication_date 2011/08/01 · arxiv updated 2015/05/28 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
A search for double beta processes in 190Pt and 198Pt was realized with the help of ultra-low background HP Ge 468 cm3 gamma spectrometer in the underground Gran Sasso National Laboratories of the INFN (Italy). After 1815 h of data taking with 42.5 g platinum sample, T1/2 limits on 2beta processes in 190Pt (εβ+ and 2ε) have been established on the level of 1014-1016 yr, 3 to 4 orders of magnitude higher than those known previously. In particular, a possible resonant double electron capture in 190Pt was restricted on the level of 2.9 × 1016 yr at 90% C.L. In addition, T1/2 limit on 2 beta- decay of 198Pt (2ν+0ν) to the 2+1 excited level of 198Hg has been set at the first time: T1/2>3.5 × 1018 yr. The radiopurity level of the used platinum sample is reported.