Search for 2β decay of 116Cd with the help of enriched 116CdWO4 crystal scintillators

被引：0

作者：

Poda, D. V. ^{[1
]}

Barabash, A. S. ^{[2
]}

Belli, P. ^{[3
]}

Bernabei, R. ^{[3
,4
]}

Cappella, F. ^{[5
,6
]}

Caracciolo, V. ^{[7
]}

Castellano, S. ^{[7
]}

Chernyak, D. M. ^{[1
]}

Cerulli, R. ^{[7
]}

Danevich, F. A. ^{[1
]}

d'Angelo, S. ^{[3
,4
]}

Incicchitti, A. ^{[5
,6
]}

Kobychev, V. V. ^{[1
]}

Konovalov, S. I. ^{[2
]}

Laubenstein, M. ^{[7
]}

Podviyanuk, R. B. ^{[1
]}

Polischuk, O. G. ^{[1
,6
]}

Shlegel, V. N. ^{[8
]}

Tretyak, V. I. ^{[1
]}

Umatov, V. I. ^{[2
]}

Vasiliev, Ya. V. ^{[8
]}

机构：

[1] Inst Nucl Res, MSP, UA-03680 Kiev, Ukraine

[2] Inst Theoret & Expt Phys, Moscow 117259, Russia

[3] Univ Roma Tor Vergata, Dipartimento Fis, I-00133 Rome, Italy

[4] Ist Nazl Fis Nucl, Sez Roma Tor Vergata, I-00133 Rome, Italy

[5] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy

[6] Ist Nazl Fis Nucl, Sez Roma La Sapienza, I-00185 Rome, Italy

[7] Ist Nazl Fis Nucl, Laboratori Nazionali Gran Sasso, I-67100 Assergi, AQ, Italy

[8] Nikolaev Inst Inorgan Chem, Novosibirsk 630090, Russia

来源：

RPSCINT 2013 - INTERNATIONAL WORKSHOP ON RADIOPURE SCINTILLATORS | 2014年 / 65卷

关键词：

DOUBLE-BETA DECAY;

D O I：

10.1051/epjconf/20136501005

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Cadmium tungstate crystal scintillators enriched in Cd-116 to 82% ((CdWO4)-Cd-116, total mass of approximate to 1.2 kg) are used to search for 2 beta decay of Cd-116 deep underground at the Gran Sasso National Laboratory of the INFN (Italy). The radioactive contamination of the (CdWO4)-Cd-116 crystals has been studied carefully to reconstruct the background of the detector. The measured half-life of Cd-116 relatively to 2 nu 2 beta decay is T-1/2(2 nu 2 beta) 1/2 = [2.8 +/- 0.05(stat.) +/- 0.4(syst.)] x 10(19) yr, in agreement with the results of previous experiments. The obtained limit on the 0 nu 2 beta decay of Cd-116 (considering the data of the last 8696 h run with an advanced background 0.12(2) counts /yr/kg/keV in the energy interval 2.7-2.9 MeV) is T-1/2 = 1.0 x 10(23) yr at 90% C. L. The sensitivity of the experiment to the 0 nu 2 beta process is lim T1/2 = 3x1023 yr at 90% C. L. over 5 years of the measurements and it can be advanced (by further reduction of the background by a factor 3-30) to the level of lim T-1/2 = (0.5-1.5) x 10(24) yr for the same period of the data taking.

引用

页数：4

共 50 条

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