Coulomb excitation of Ca 44 and Ar 46

Calinescu, S. and Cáceres, L. and Grévy, S. and Sorlin, O. and Dombrádi, Zsolt and Kunné Sohler, Dorottya and Vajta, Zsolt (2016) Coulomb excitation of Ca 44 and Ar 46. PHYSICAL REVIEW C, 93 (4). pp. 1-8. ISSN 0556-2813

Preview

Text PhysRevC.93.044333.pdf Download (410kB) | Preview

Abstract

The reduced transition probabilities B(E2;0g.s.+→21+) of the Ar46 and Ca44 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 64BaF2 crystals. The present B(E2↑) value for Ca44, 475(36) e2fm4, agrees well with the value of 495(35) e2fm4 obtained by averaging results of previous experiments. Consistent B(E2;0g.s.+→21+) values of 225(29) e2fm4 and 234(19) e2fm4 have been obtained for Ar46 from an absolute and a relative measurement, normalized to the Ca44 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;0g.s.+→21+) in the Ar chain at N=28, confirmed in this experiment, shows that Ar46 is sensitive to the N=28 shell closure. © 2016 American Physical Society.

Actions (login required)

Edit Item