6533b81ffe1ef96bd1278e65
RESEARCH PRODUCT
Shell-model study of the highly forbidden beta decay 48 Ca → 48 Sc
Teemu SiiskonenJouni SuhonenM. Aunolasubject
PhysicsDouble beta decayExcited stateSHELL modelGeneral Physics and AstronomyState (functional analysis)Atomic physicsGround stateWave functionBeta decayHarmonic oscillatordescription
Ordinary β− decay of the 0+ ground state of 48Ca is studied. Partial half-lives for the highly-forbidden transitions to the three lowest-lying states (6+,5+,4+) of 48Sc are calculated by using both the harmonic oscillator and the Woods-Saxon mean-field wave functions. We find the decay to be dominated, as expected, by the unique fourth-forbidden transition to the excited 5+ state of 48Sc. The theoretical beta-decay half-life of 48Ca is found to be 1.1−0.6+0.8·1021 years which is approximately 25 times longer than the measured double-beta-decay half-life of T1/22ν = (4.3−1.1+2.4[stat] ± 1.4[syst])·1019 years.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1999-06-01 | Europhysics Letters (EPL) |