Transition probabilities in the X(5) candidate $^{122}$Ba
P. G. Bizzeti, A. M. Bizzeti-Sona, D. Tonev, A. Giannatiempo, C.A. Ur,, A. Dewald, B. Melon, C. Michelagnoli, P. Petkov, D. Bazzacco, A. Costin, G., de Angelis, F. Della Vedova, M. Fantuzi, E. Farnea, C. Fransen, A. Gadea, S., Lenzi, S. Lunardi, N. Marginean, R. Marginean
TL;DR
This study measures lifetimes and B(E2) values of 122Ba to evaluate its potential X(5) critical point symmetry, comparing experimental data with theoretical models to understand its nuclear structure.
Contribution
The paper provides new lifetime measurements and B(E2) values for 122Ba, testing the X(5) model against IBA predictions to clarify its nuclear shape characteristics.
Findings
B(E2) values are consistent with X(5) predictions.
Lifetimes support the X(5) critical point symmetry.
Comparison with IBA models shows good agreement.
Abstract
To investigate the possible X(5) character of 122Ba, suggested by the ground state band energy pattern, the lifetimes of the lowest yrast states of 122Ba have been measured, via the Recoil Distance Doppler-Shift method. The relevant levels have been populated by using the 108Cd(16O,2n)122Ba and the 112Sn(13C,3n)122Ba reactions. The B(E2) values deduced in the present work are compared to the predictions of the X(5) model and to calculations performed in the framework of the IBA-1 and IBA-2 models.
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