Beta-decay half-lives at the N=28 shell closure

Beta-decay half-lives at the N=28 shell closure

Measurements of the beta-decay half-lives of neutron-rich nuclei (MgAr) in the vicinity of the N=28 shell closure are reported. Some 22 half-lives have been determined, 12 of which for the first time. Particular emphasis is placed on the results for the Si isotopes, the half-lives of which have bee...

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Veröffentlicht in:Physics letters. B 2004-08, Vol.594 (3-4), p.252-259
Hauptverfasser: Grévy, S., Angélique, J.C., Baumann, P., Borcea, C., Buta, A., Canchel, G., Catford, W.N., Courtin, S., Daugas, J.M., de Oliveira, F., Dessagne, P., Dlouhy, Z., Knipper, A., Kratz, K.L., Lecolley, F.R., Lecouey, J.L., Lehrsenneau, G., Lewitowicz, M., Liénard, E., Lukyanov, S., Maréchal, F., Miehé, C., Mrazek, J., Negoita, F., Orr, N.A., Pantelica, D., Penionzhkevich, Y., Péter, J., Pfeiffer, B., Pietri, S., Poirier, E., Sorlin, O., Stanoiu, M., Stefan, I., Stodel, C., Timis, C.
Format: Artikel
Sprache:eng
Schlagworte:
Beta decay
Lifetimes
Nuclear Experiment
Physics
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Zusammenfassung:Measurements of the beta-decay half-lives of neutron-rich nuclei (MgAr) in the vicinity of the N=28 shell closure are reported. Some 22 half-lives have been determined, 12 of which for the first time. Particular emphasis is placed on the results for the Si isotopes, the half-lives of which have been extended from N=25 to 28. Comparison with QRPA calculations suggests that 42Si is strongly deformed. This is discussed in the light of a possible weakening of the spin–orbit potential.
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2004.06.005