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Centro de Física Miguel A. Catalán - Instituto de Estructura de la Materia (CFMAC-IEM) >
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| Authors: | Boutami, Rafik
García Borge, María José
Fraile, Luis M.
García-Raffi, L. M.
Martínez, T.
Rubio, Berta
Taín, José Luis
Tengblad, Olof |
| Keywords: | Radioactivity, Fr-231, Ra(β−)-231 [from 238U(p, X), Ep=1 GeV and subsequent mass separation], Measured, E(γ), I(γ), E(β), γγ-, βγ-coincidence, T(1/2), Deduced, log(ft), Ac-231 deduced, levels, J, π, ICC, multipolarities, B(E1), B(M1), T1/2, Mini-orange spectrometer, Advanced Time Delayed (ATD) βγγ(t) method |
| Issue Date: | 19-Aug-2008 |
| Publisher: | Elsevier |
| Citation: | Nuclear Physics A 811(3-4): 244–275 (2008) |
| Abstract: | The low-energy structure of Ac-231 has been investigated by means of γ ray spectroscopy following the β− decay of Ra-231. Multipolarities of 28 transitions have been established by measuring conversion
electrons with a MINI-ORANGE electron spectrometer. The decay scheme of Ra-231 → Ac-231 has been constructed for the first time. The Advanced Time Delayed βγγ(t) method has been used to measure the half-lives of five levels. The moderately fast B(E1) transition rates derived suggest that the octupole effects, albeit weak, are still present in this exotic nucleus. |
| Description: | 32 pages, 7 figures, 5 tables.-- PACS nrs.: 21.10.-k; 21.10.Tg; 21.10.Re; 23.20.-g; 23.20.Lv; 27.90.+b.-- Printed version published Oct 15, 2008.-- et al.-- ArXiv pre-print available at: http://arxiv.org/abs/0808.0790 |
| Publisher version (URL): | http://dx.doi.org/10.1016/j.nuclphysa.2008.08.005 |
| URI: | http://hdl.handle.net/10261/12032 |
| ISSN: | 0375-9474 |
| ???metadata.dc.identifier.doi???: | 10.1016/j.nuclphysa.2008.08.005 |
| Appears in Collections: | (CFMAC-IEM) Artículos
(IFIC) Artículos
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