B(GT) strength from beta-decay measurements and inferred shape mixing in Kr-74
| Autor: | Poirier, E, Marechal, F, Dessagne, P, Algora, A, Borge, M J, Cano-Ott, D, Caspar, J C, Courtin, S, Devin, J, Fraile, L M, Gelletly, W, Heitz, G, Jungclaus, A, Le Scornet, G, Miehe, C, Nacher, E, Rubio, B, Sarriguren, P, Tain, J L, Tengblad, O, Weber, C |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
59 ≤ A ≤ 89 [[PACS] Properties of specific nuclei listed by mass ranges]
Sr isotopes Relation with nuclear matrix elements and nuclear structure [[PACS] Beta decay] [PACS] Properties of specific nuclei listed by mass ranges: 59 ≤ A ≤ 89 Proton drip-line [PACS] Beta decay: Relation with nuclear matrix elements and nuclear structure Nuclear Experiment Level density [PACS] Single-particle levels and strength functions |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| Popis: | 8 pages, 5 figures.-- PACS nrs.: 21.10.Pc, 23.40.Hc, 27.50.+e. 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. This work has been partly supported by EPSRC(UK), by the IN2P3 /CNRS (France) and CICYT (Spain) under Contract Nos. PN98-1 and PN00-1, by the CICYT under Contract No. AEN99-1046-CO2-01/02, by the MCyT under Contract No. BFM2002-03562, and by the European Large Scale Facility Grant No. HPRI-CT-1999-00018. A. Algora is a post-doctoral research fellow under the Marie Curie Contract No. HPMF-CT-1999-00394. A. Jungclaus acknowledges financial support from the Deutsche Forschungsgemeinschaft (DFG) within the Heisenberg program. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|