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Main Authors: Moral, A. Ortega, Wang, S. M., Giovinazzo, J., Roger, T., Blank, B., Ascher, P., Borcea, C., Caceres, L., Caamano, M., Santos, F. de Oliveira, de Roubin, A., Fernandez-Dominguez, B., Fernandez-Dominguez, D., Lois-Fuentes, J., Gerbaux, M., Grevy, S., Hukkanen, M., Husson, A., Kamalou, O., Kurtukian-Nieto, T., Michaud, J., Pancin, J., Piot, J., Pomorski, M., Regueira-Castro, D., Sanchez-Benitez, A. M., Sorlin, O., Stanoiu, M., Stodel, C., Thomas, J. -C., Vandebrouck, M.
Format: Preprint
Published: 2025
Subjects:
Nuclear Experiment
Online Access:https://arxiv.org/abs/2504.14607
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Table of Contents:
  • The main observables of the rare two-proton emission process - half-life, total energy of the decay as well as energy and angular correlations between the emitted protons - have been measured for 48Ni and 45Fe in a recent experiment performed at the GANIL/LISE3 facility. The results, together with previous experimental work, are compared for the first time with calculations performed in the recently developed Gamow Coupled-Channel (GCC) framework and to 3-body predictions from literature. The comparison of the 48Ni and the 45Fe two-proton angular distributions with the GCC calculations confirms the adopted strength of the proton-proton interaction for both nuclei and the predominant small-angle emission. A comparison with 3-body model angular distributions indicates the shell closure of the f_7/2 orbital for 48Ni and a substantial occupancy of the p-orbital for 45Fe. Discrepancies between experimental data and theoretical predictions are found when studying the other observables: half-lives, total energy of the decay and energy correlations, showing the complexity of the description of the two-proton emission process.

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