6533b82dfe1ef96bd1291601
RESEARCH PRODUCT
First beta-decay studies of the neutron-rich isotopes 53-55Sc and 56-59V
S. GrévyKarl KratzW.-d. Schmidt-ottM. LewitowiczP. MöllerAlexander OstrowskiThomas RauscherM. G. Saint-laurentA.c. MuellerF. PougheonB. PfeifferR. AnneV. BorrelD. Guillemaud-muellerW. BöhmerT. DörflerT. MehrenO. Sorlinsubject
PhysicsNuclear and High Energy PhysicsIsotope010308 nuclear & particles physicsContext (language use)Alpha process[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]01 natural sciencesBeta decayNuclear physicsMeteoriteNucleosynthesis0103 physical sciencesr-processNeutronAtomic physics010306 general physicsdescription
The neutron-rich isotopes Sc53-55 and V56-59 have been produced at GANIL in interactions of a 64.5 MeV/u Cu-65 beam with a Be-9 target. They were separated by the doubly achromatic spectrometer LISE3. Beta-decay half-lives and subsequent low-energy gamma-rays were observed for the first time. The present results are compared to QRPA model predictions. The quick drop of the half-life observed at N = 33 for Ca-53(20)33 is water V-56(23)33 and absent for Sc-54(21)33, indicating a vanishing of the N = 32 subshell north to Ca-52(32). In an astrophysical context, these neutron-rich isotopes represent r-process progenitors which, after beta-decay, would produce the correlated isotopic over-abundances of Cr-54, Fe-58, Ni-64 in certain refractory inclusions of meteorites. (C) 1998 Elsevier Science B.V.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1998-03-01 |