Search for 2β decay of cerium isotopes with CeCl3 scintillator

被引：29

作者：

Belli, P. ^{[1
]}

Bernabei, R. ^{[1
,2
]}

Cappella, F. ^{[3
,4
]}

Cerulli, R. ^{[5
]}

Danevich, F. A. ^{[6
]}

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

Di Marco, A. ^{[5
]}

Incicchitti, A. ^{[3
]}

Nozzoli, F. ^{[1
,2
]}

Tretyak, V. I. ^{[6
]}

机构：

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

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

[3] Ist Nazl Fis Nucl, Sez Roma, I-00185 Rome, Italy

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

[5] Ist Nazl Fis Nucl, Lab Nazl Gran Sasso, I-67010 Assergi, AQ, Italy

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

来源：

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS | 2011年 / 38卷 / 01期

关键词：

DOUBLE-BETA-DECAY; CRYSTAL SCINTILLATOR; ECEC PROCESSES; EXCITED-STATES; LIMITS; PERFORMANCES; TABLES; TRANSITIONS; ELEMENTS; CAPTURE;

D O I：

10.1088/0954-3899/38/1/015103

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Double beta processes in Ce-136, Ce-138 and Ce-142 have been searched for by exploiting the active source approach with the help of a 6.9 g CeCl3 crystal as a scintillator for the first time at the Gran Sasso National Laboratory (LNGS) of the INFN (Italy). The total measurement time is 1638 h; even such a small exposure has allowed the achievement of some improved half-life limits on 2 beta decay processes in these isotopes at the level of 10(16)-10(18) yr. In particular (90% C.L.): T-1/2(0 nu epsilon beta+)(Ce-136) >= 8.8 x 10(16) yr,T-1/2(2 nu epsilon beta+)(Ce-136) >= 2.4 x 10(16) yr,T-1/2(2 nu 2K)(Ce-136) >= 3.2 x 10(16) yr, T-1/2(2 nu 2K)(Ce-138) >= 4.4 x 10(16) yr, and T-1/2(2 nu 2 beta) (Ce-142) >= 1.4 x 10(18) yr. Possible future perspectives are also briefly addressed.

引用

页数：15

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