Coulomb excitation ofCa44andAr46
| Autor: | E. Wilson, P. Morfouace, István Kuti, S. Franchoo, T. Roger, Zsolt Dombrádi, J. Mrazek, Megumi Niikura, C. Petrone, W. N. Catford, Zs. Podolyák, O. Sorlin, I. Stefan, S. Calinescu, S. M. Lukyanov, R. Garcia, L. Perrot, M. Bowry, V. A. Maslov, R. A. Astabatyan, Dóra Sohler, Emyr Clement, F. Negoita, S. Grévy, Yu. Penionzhkevich, I. H. Guerin, Zs. Vajta, R. Borcea, C. Borcea, J. C. Thomas, M. Stanoiu, A. Lepailleur, R. Gillibert, F. Rotaru, L. Caceres |
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| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | Physical Review C. 93 |
| ISSN: | 2469-9993 2469-9985 |
| DOI: | 10.1103/physrevc.93.044333 |
| Popis: | The reduced transition probabilities B(E2; 0+ g.s. → 2+ 1 ) of the 46Ar and 44Ca nuclei were studied using the Coulomb excitation technique at intermediate energy at the LISE/GANIL facility. The in-flight γ rays, emitted after the Coulomb excitation of their first 2+ states, were detected in an array of 64 BaF2 crystals. The present B(E2 ↑) value for 44Ca, 475(36) e2fm4 , agrees well with the value of 495(35) e2fm4 obtained by averaging results of previous experiments. Consistent B(E2; 0+ g.s. → 2+ 1 ) values of 225(29) e2fm4 and 234(19) e2fm4 have been obtained for 46Ar from an absolute and a relative measurement, normalized to the 44Ca value. Both results agree with the ones obtained with the same experimental technique at the NSCL facility but are a factor of 2 smaller than the shell model predictions. The drop in B(E2; 0+ g.s. → 2+ 1 ) in the Ar chain at N = 28, confirmed in this experiment, shows that 46Ar is sensitive to the N = 28 shell closure. |
| Databáze: | OpenAIRE |
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