The N = Z nucleus 76 Sr: Gamow-Teller strength and nuclear deformation
| Autor: | V. Rauch, A. Knipper, Ph. Dessagne, A. Jokinen, J. Giovinazzo, A. Huck, Olof Tengblad, María José García Borge, Ch. Miehé, M. Ramdhane, G. Walter, C. Longour, G. Marguier |
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| Rok vydání: | 2004 |
| Předmět: |
59 ≤ A ≤ 89 [[PACS] Properties of specific nuclei listed by mass ranges]
Physics Nuclear and High Energy Physics [PACS] Properties of specific nuclei listed by mass ranges: 59 ≤ A ≤ 89 [PACS] Spin parity and isobaric spin Branching fraction Hadron [PACS] γ transitions and level energies Order (ring theory) Deformation (meteorology) medicine.anatomical_structure medicine Nuclear fusion Proton emission Atomic physics Ground state Nucleus [PACS] Relation with nuclear matrix elements and nuclear structure |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| ISSN: | 1434-601X 1434-6001 |
| DOI: | 10.1140/epja/i2003-10171-6 |
| Popis: | 7 pages, 4 tables, 6 figures.--PACS nrs.: 21.10.Hw; 23.20.Lv; 23.40.Hc; 27.50.+e. Challenged by recent theoretical work, a, study of the β(+)-EC decay of the N = Z even-even nucleus Sr-76 has been undertaken in order to assign the parent ground-state deformation. lit this study 13 levels with J(π) = 1(+) have been located in Rb-76. The β-delayed proton emission has been observed for the first time in an N = Z even-even nucleus. The betap branching ratio has been determined to be (3.4 ± 0.8)x10(-5). The Sr-76 half-life has been remeasured and a more precise value of 7.89 ± 0.07 s has been obtained. On the basis of the comparison of measured Gamow-Teller strength with calculated strength distributions for both oblate and prolate deformation, it is concluded that the Sr-76 has strong prolate deformation in the ground state. This work was partially supported by the Spanish Agency CICYT under contract Nos. AEN96-1679 and AEN99-1046-C02-01, and by the French and Spanish Agreement IN2P3-CICYT. |
| Databáze: | OpenAIRE |
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