6533b828fe1ef96bd1288381
RESEARCH PRODUCT
High-precision mass measurements of 25Al and 30P at JYFLTRAP
Ari JokinenL. CaneteDmitry GorelovJuuso ReinikainenTommi EronenSami Rinta-antilaIain MooreAnu KankainenVeli KolhinenJukka KoponenJani Hakalasubject
Nuclear reactionNuclear and High Energy PhysicsmassaspektrometriaQ valueAstrophysics::High Energy Astrophysical PhenomenaastrofysiikkaHadronatomipainot01 natural sciencesNuclear physics0103 physical sciencesNuclear astrophysicsJYFLTRAPIsotopes of siliconalumiiniNuclear Experiment010306 general physicsfosforiPhysics010308 nuclear & particles physicsatomic massPenning trapAtomic masshigh-precision mass measurementAtomic physicsydinfysiikkaRadioactive decaydescription
The masses of the astrophysically relevant nuclei 25Al and 30P have been measured with a Penning trap for the first time. The mass-excess values for 25Al ( $\Delta = -8915.962(63)$ keV) and 30P ( $\Delta = -20200.854(64)$ keV) obtained with the JYFLTRAP double Penning trap mass spectrometer are in good agreement with the Atomic Mass Evaluation 2012 values but $ \approx$ 5-10 times more precise. A high precision is required for calculating resonant proton-capture rates of astrophysically important reactions 25Al (p, $ \gamma$ )26Si and 30P(p, $ \gamma$ )31S . In this work, $ Q_{(p,\gamma)} = 5513.99(13)$ keV and $ Q_{(p,\gamma)} = 6130.64(24)$ keV were obtained for 25Al and 30P , respectively. The effect of the more precise values on the resonant proton-capture rates has been studied. In addition to nuclear astrophysics, the measured QEC value of 25Al , 4276.805(45) keV, is relevant for studies of T = 1/2 mirror beta decays which have a potential to be used to test the Conserved Vector Current hypothesis.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-05-01 |