| Autor: |
V. Artemiev, O. M. Kozodaeva, A. K. Karelin, V. V. Kirichenko, O. Ya. Zeldovich, V. M. Knyazev, T. N. Tsvetkova, M.A. Ivanovsky, A. I. Mitin, V. Lubimov, V. P. Nikolaev, E. V. Brakchman |
| Rok vydání: |
1991 |
| Předmět: |
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| Zdroj: |
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 303:309-322 |
| ISSN: |
0168-9002 |
| DOI: |
10.1016/0168-9002(91)90797-t |
| Popis: |
A detector for studying the 136 Xe 2β-decay with a proportional drift chamber of volume V = 13 m 3 and operating with 10 kg of 136 Xe is considered. A limit of T 1 2 (2β0ν) > 10 23 yr can be reached at the sea level. The invesigation of background with a prototype (size (1.0×0.8×0.4) m 3 and 136 Xe mass 0.5 kg) showed that the track information allows a high background-rejection coefficient (> 10 6 ). The technique proposed in this article allows the defining of the admixture of 222 Rn in the working gas at a level of 10 −20 −10 −21 atom/atom. A half-life limit of T 1 2 (2β2ν) > 2×10 19 yr (90% CL) was obtained. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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