Performances of a CeF3 crystal scintillator and its application to the search for rare processes

被引：106

作者：

Belli, P

Bernabei, R

Cerulli, R

Dai, CJ

Danevich, FA

Incicchitti, A

Kobychev, VV

Ponkratenko, OA

Prosperi, D

Tretyak, VI

Zdesenko, YG

机构：

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

[2] Ist Nazl Fis Nucl, Sez Roma 2, I-00133 Rome, Italy

[3] Chinese Acad, IHEP, Beijing 100039, Peoples R China

[4] Inst Nucl Res, UA-03680 Kiev, Ukraine

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

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

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

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2003年 / 498卷 / 1-3期

关键词：

CeF3 crystal scintillator; alpha/beta ratio; pulse shape discrimination; double beta decay; alpha decay; Ce isotopes;

D O I：

10.1016/S0168-9002(02)02106-X

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The performances of a CeF3 crystal scintillator with a mass of 49.3 g have been investigated. In particular, the alpha/beta light ratio and the possibility of a pulse-shape discrimination between alpha particles and gamma quanta have been studied. The radioactive contamination of the crystal has been investigated. The application of the obtained results in the search for rare processes such as the two neutrino double electron capture in Ce-136 and Ce-138 and the alpha activity in Ce-142 has been investigated. As a result, new T-1/2 limits for these processes have been deter-mined (90% C.L.): T-1/2(2v2) (K)(Ce-136)greater than or equal to 2 7 x 10(16) yr, T-1/2(2v2) (K)(Ce-138)greater than or equal to 3.7 x 10(16) yr and T-1/2(alpha) (Ce-142)greater than or equal to 2.9 x 10(18) yr. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：352 / 361

页数：10

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