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Resonant enhancement of neutrinoless double-electron capture in 152Gd.

Authors :
Eliseev S
Roux C
Blaum K
Block M
Droese C
Herfurth F
Kluge HJ
Krivoruchenko MI
Novikov YN
Minaya Ramirez E
Schweikhard L
Shabaev VM
Simkovic F
Tupitsyn II
Zuber K
Zubova NA
Source :
Physical review letters [Phys Rev Lett] 2011 Feb 04; Vol. 106 (5), pp. 052504. Date of Electronic Publication: 2011 Feb 04.
Publication Year :
2011

Abstract

In the search for the nuclide with the largest probability for neutrinoless double-electron capture, we have determined the Q(ϵϵ) value between the ground states of (152)Gd and (152)Sm by Penning-trap mass-ratio measurements. The new Q(ϵϵ) value of 55.70(18) keV results in a half-life of 10(26)  yr for a 1 eV neutrino mass. With this smallest half-life among known 0νϵϵ transitions, (152)Gd is a promising candidate for the search for neutrinoless double-electron capture.

Details

Language :
English
ISSN :
1079-7114
Volume :
106
Issue :
5
Database :
MEDLINE
Journal :
Physical review letters
Publication Type :
Academic Journal
Accession number :
21405389
Full Text :
https://doi.org/10.1103/PhysRevLett.106.052504