6533b81ffe1ef96bd1278444
RESEARCH PRODUCT
Accurate Q value for the 74Se double-electron-capture decay
Veli KolhinenJouni SuhonenAri JokinenJuha ÄYstöV.-v. ElomaaTommi EronenJani HakalaM. KortelainenM. Kortelainensubject
Nuclear physicsPhysicsNuclear and High Energy PhysicsElectron captureQ valueMatrix elementAtomic physicsNuclear ExperimentDegeneracy (mathematics)Penning trapNucleondescription
Abstract The Q value of the neutrinoless double-electron-capture ( 0 ν ECEC ) decay of 74Se was measured by using the JYFLTRAP Penning trap. The determined value is 1209.169(49) keV, which practically excludes the possibility of a complete energy degeneracy with the second 2 + state (1204.205(7) keV) of 74Ge in a resonant 0 ν ECEC decay. We have also computed the associated nuclear matrix element by using a microscopic nuclear model with realistic two-nucleon interactions. The computed matrix element is found to be quite small. The failure of the resonant condition, combined with the small nuclear matrix element and needed p-wave capture, suppresses the decay rate strongly and thus excludes 74Se as a possible candidate to search for resonant 0 ν ECEC processes.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2010-02-01 | Physics Letters B |