First beta-decay studies of the neutron-rich isotopes Sc53-55 and V56-59

Sorlin, O. and Borrel, V. and Grevy, S. and Guillemaud-Mueller, D. and Mueller, A. C. and Pougheon, F. and Bohmer, W. and Kratz, K. L. and Mehren, T. and Moller, P. and Pfeiffer, B. and Rauscher, T. and Saint-Laurent, M. G. and Anne, R. and Lewitowicz, M. and Ostrowski, A. and Dorfler, T. and Schmidt-Ott, W. D.. (1998) First beta-decay studies of the neutron-rich isotopes Sc53-55 and V56-59. Nuclear physics. A, Nuclear and hadronic physics, Vol. 632, H. 2. pp. 205-228.

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Official URL: http://edoc.unibas.ch/dok/A5839345

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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.
Faculties and Departments:05 Faculty of Science > Departement Physik > Former Organization Units Physics > Theoretische Physik Astrophysik (Thielemann)
UniBasel Contributors:Rauscher, Thomas
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:North Holland
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:14 Sep 2012 07:18
Deposited On:14 Sep 2012 06:44

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