Simultaneous impacts of nuclear shell structure and collectivity on $\beta$ decay: Evidence from $^{80}$Ga$_{49}$
Abstract
The Gamow-Teller strength distribution covering the entire -decay window, up to 10.312(4) MeV, of Ga was measured for the first time in photo fission of UC induced by a 50 MeV electron beam. The new data show significant enhancement in the high-energy region with a jump structure. Simultaneously, the deexciting behavior of -populated states presents a competition between deexcitation to 2 [ = 0.155(9)] and to 2 [ = 0.053)] in Ge. To understand these data, we performed a realistic shell-model calculation and systematic analysis of log ratios between precursors' decay to 2 and to 2 of Ga isotopes. We conclude that these phenomena evidence simultaneous impacts of nuclear shell structure and collectivity on (GT) distribution and therefore the half-life of the precursor.
Cite
@article{arxiv.2405.20490,
title = {Simultaneous impacts of nuclear shell structure and collectivity on $\beta$ decay: Evidence from $^{80}$Ga$_{49}$},
author = {R. Li and D. Verney and G. De Gregorio and R. Mancino and I. Matea and L. Coraggio and N. Itaco. and M. N. Harakeh and C. Delafosse and F. Didierjean and L. A. Ayoubi and H. Al Falou and G. Benzoni and F. Le Blanc and V. Bozkurt and M. Ciemała and I. Deloncle and M. Fallot and C. Gaulard and A. Gottardo and V. Guadilla and J. Guillot and K. Hadyńska-Klęk and F. Ibrahim and N. Jovancevic and A. Kankainen and M. Lebois and T. Martínez and P. Napiorkowski and B. Roussiere and Yu. G. Sobolev and I. Stefan and S. Stukalov and D. Thisse and G. Tocabens},
journal= {arXiv preprint arXiv:2405.20490},
year = {2025}
}