First search for double beta decay of platinum by ultra-low background HP Ge gamma spectrometry
| Autor: | Belli, P., Bernabei, R., Cappella, F., Cerulli, R., Danevich, F. A., Di Marco, A., Incicchitti, A., Laubenstein, M., Nagorny, S. S., Nisi, S., Polischuk, O. G., Tretyak, V. I. |
|---|---|
| Rok vydání: | 2011 |
| Předmět: | |
| Zdroj: | Eur. Phys. J. A 47 (2011) 91 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1140/epja/i2011-11091-6 |
| Popis: | A search for double beta processes in 190Pt and 198Pt was realized with the help of ultra-low background HP Ge 468 cm^3 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, T_{1/2} limits on 2beta processes in 190Pt (\epsilon\beta^+ and 2\epsilon) have been established on the level of 10^{14}-10^{16} 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 \times 10^{16} yr at 90% C.L. In addition, T_{1/2} limit on 2 beta^- decay of 198Pt (2\nu+0\nu) to the 2^+_1 excited level of 198Hg has been set at the first time: T_{1/2}>3.5 \times 10^{18} yr. The radiopurity level of the used platinum sample is reported. Comment: 13 pages, 6 figures, 2 tables |
| Databáze: | arXiv |
| Externí odkaz: |
|