Search for double beta decay of Zinc and Tungsten with the help of low-background ZnWO4 crystal scintillators
| Autor: | Belli, P., Bernabei, R., Cappella, F., Cerulli, R., Danevich, F. A., Grinyov, B. V., Incicchitti, A., Kobychev, V. V., Mokina, V. M., Nagorny, S. S., Nagornaya, L. L., Nisi, S., Nozzoli, F., Poda, D. V., Prosperi, D., Tretyak, V. I., Yurchenko, S. S. |
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| Rok vydání: | 2008 |
| Předmět: | |
| Zdroj: | Nucl. Phys. A 826 (2009) 256 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1016/j.nuclphysa.2009.05.139 |
| Popis: | Double beta processes in 64-Zn, 70-Zn, 180-W, and 186-W have been searched for with the help of large volume (0.1-0.7 kg) low background ZnWO4 crystal scintillators at the Gran Sasso National Laboratories of the INFN. Total time of measurements exceeds 10 thousands hours. New improved half-life limits on double electron capture and electron capture with positron emission in 64-Zn have been set, in particular (all the limits are at 90% C.L.): T1/2(0nu2EC)> 1.1e20 yr, T1/2(2nuECbeta+)>7.0e20 yr, and T1/2(0nuECbeta+)>4.3e20 yr. The different modes of double beta processes in 70-Zn, 180-W, and 186-W have been restricted at the level of 1e17-1e20 yr. Comment: 20 p., submitted to Phys. Rev. C |
| Databáze: | arXiv |
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