New limits on 2β+ decay processes in 106Cd

被引：105

作者：

Belli, P

Bernabei, R

Incicchitti, A

Arpesella, C

Kobychev, VV

Ponkratenko, OA

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

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

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

[6] Ukrainian Acad Sci, Inst Nucl Res, UA-252650 Kiev, Ukraine

来源：

ASTROPARTICLE PHYSICS | 1999年 / 10卷 / 01期

关键词：

D O I：

10.1016/S0927-6505(98)00034-6

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

An experiment to study the double positron decay of Cd-106 (beta(+)beta(+), beta(+)/EC or EC/EC) has been performed at the Gran Sasso National Laboratory of INFN. A low background setup with two large NaI(TI) crystals and cadmium samples (total mass similar or equal to 154 g), enriched in Cd-106 at 68%, have been used. New limits on the half-lives for the different beta(+)beta(+), beta(+)/EC and EC/EC decay channels in Cd-106 have been obtained. They are in the range (0.3-4) 10(20) y at 90% C.L., which is significantly higher (by a factor 6 to 60) than those already published for this nuclide. (C) 1999 Elsevier Science B.V.

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页码：115 / 120

页数：6

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