Isospin symmetry breaking at high spin in the mirror nuclei 35Ar and 35Cl

Della Vedova, Francesca; Lenzi, Silvia Monica; Ionescu Bujor, M.; Marginean, N.; Axiotis, M.; Bazzacco, D.; Bizzeti Sona, A. M.; Bizzeti, P. G.; Bracco, A.; Brandolini, Franco; Bucurescu, D.; Farnea, E.; Iordachescu, A.; Lunardi, Santo; Martinez, T.; Mason, P.; Menegazzo, R.; Million, B.; Napoli, D. R.; Nespolo, Massimo; Pavan, Pietro; Rossi Alvarez, C.; C. A., Ur; Venturelli, Roberto; Zuker, A. P.

doi:10.1103/PhysRevC.75.034317

High-spin states in 35Ar and 35Cl have been populated in the 24Mg(16O, αn) and 24Mg(16O, αp) reactions, respectively, at a beam energy of 70 MeV. The comparison between the level schemes of these mirror nuclei shows a striking asymmetry in the population yield of high-spin analog states of positive parity, which indicates different intensities of E1 transitions connecting positive- and negative-parity structures in both nuclei. Large energy differences are observed between analog states of negative parity with configurations of dominant pure single-particle character. This results from the comparison with large-scale shell-model calculations in the s1/2d3/2f7/2p3/2 valence space. It is shown that important contributions to the energy differences arise from the multipole Coulomb and the relativistic electromagnetic spin-orbit interactions.

Titolo:	Isospin symmetry breaking at high spin in the mirror nuclei 35Ar and 35Cl
Autori:	DELLA VEDOVA, FRANCESCA LENZI, SILVIA MONICA M. IONESCU BUJOR N. MARGINEAN M. AXIOTIS D. BAZZACCO A. M. BIZZETI SONA P. G. BIZZETI A. BRACCO BRANDOLINI, FRANCO D. BUCURESCU E. FARNEA A. IORDACHESCU LUNARDI, SANTO T. MARTINEZ P. MASON R. MENEGAZZO B. MILLION D. R. NAPOLI NESPOLO, MASSIMO PAVAN, PIETRO C. ROSSI ALVAREZ C. A. UR VENTURELLI, ROBERTO A. P. ZUKER mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	2007
Rivista:	PHYSICAL REVIEW. C, NUCLEAR PHYSICS
Abstract:	High-spin states in 35Ar and 35Cl have been populated in the 24Mg(16O, αn) and 24Mg(16O, αp) reactions, respectively, at a beam energy of 70 MeV. The comparison between the level schemes of these mirror nuclei shows a striking asymmetry in the population yield of high-spin analog states of positive parity, which indicates different intensities of E1 transitions connecting positive- and negative-parity structures in both nuclei. Large energy differences are observed between analog states of negative parity with configurations of dominant pure single-particle character. This results from the comparison with large-scale shell-model calculations in the s1/2d3/2f7/2p3/2 valence space. It is shown that important contributions to the energy differences arise from the multipole Coulomb and the relativistic electromagnetic spin-orbit interactions.
Handle:	http://hdl.handle.net/11577/2433310
Appare nelle tipologie:	01.01 - Articolo in rivista

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