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Open Access item B(GT) strength from beta-decay measurements and inferred shape mixing in Kr-74

Authors:Poirier, E.
Maréchal, F.
Dessagne, Ph.
Algora, Alejandro
García Borge, María José
Cano Ott, Daniel
Caspar, J. C.
Courtin, S.
Devin, J.
Fraile, Luis M.
Gelletly, W.
Heitz, G.
Jungclaus, Andrea
Le Scornet, G.
Miehé, Ch.
Nácher, Enrique
Rubio, Berta
Sarriguren, Pedro
Taín, José Luis
Tengblad, Olof
Weber, C.
Keywords:Proton drip-line, Level density, Sr isotopes, [PACS] Single-particle levels and strength functions, [PACS] Beta decay: Relation with nuclear matrix elements and nuclear structure, [PACS] Properties of specific nuclei listed by mass ranges: 59 ≤ A ≤ 89
Issue Date:3-Mar-2004
Publisher:American Physical Society
Citation:Physical Review C 69(3): 034307 (2004)
Abstract:A total absorption spectrometer, dedicated to the study of very short-lived atomic species, has been built and installed at the CERN/ISOLDE mass separator. The beta decay of the neutron-deficient Kr-74 nucleus has been studied using this new device. The Gamow-Teller strength distribution has been observed over most of the Q(EC) window, and a total strength of 0.69(3) g(A)(2)/4pi has been measured for states with excitation energy below 3 MeV. Shape mixing in the Kr-74 ground state is inferred from a comparison of the experimental strength distribution with self-consistent, deformed, quasiparticle-random-phase-approximation calculations.
Description:8 pages, 5 figures.-- PACS nrs.: 21.10.Pc, 23.40.Hc, 27.50.+e.
Publisher version (URL):http://dx.doi.org/10.1103/PhysRevC.69.034307
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