Two-proton correlations in the decay of 48Ni and 45Fe
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.
Authors
- J. C. Thomas (ORCID: https://orcid.org/0000-0001-6618-9772)
- M. Hukkanen (ORCID: https://orcid.org/0000-0002-4317-3628)
- P. Ascher (ORCID: https://orcid.org/0000-0002-1990-0848)
- M. Pomorski (ORCID: https://orcid.org/0000-0003-1272-1764)
- O. Sorlin (ORCID: https://orcid.org/0000-0001-6424-4379)
- T. Kurtukian‐Nieto (ORCID: https://orcid.org/0000-0002-0028-0220)
- M. Vandebrouck (ORCID: https://orcid.org/0000-0002-0980-3155)
- B. Fernández–Domínguez (ORCID: https://orcid.org/0000-0001-7859-2438)
- B. Blank
- J. Piot (ORCID: https://orcid.org/0000-0002-6593-6964)
- T. Roger (ORCID: https://orcid.org/0000-0003-4646-5076)
- M. Gerbaux (ORCID: https://orcid.org/0000-0002-3852-2643)
- A. Husson (ORCID: https://orcid.org/0000-0001-9798-0655)
- M. Stănoiu (ORCID: https://orcid.org/0000-0002-9992-9463)
- C. Borcea (ORCID: https://orcid.org/0000-0001-5886-6737)
- S. Grévy (ORCID: https://orcid.org/0000-0003-2680-1802)
- M. Caamaño (ORCID: https://orcid.org/0000-0002-5045-003X)
- A. de Roubin (ORCID: https://orcid.org/0000-0002-6817-7254)
- J. Michaud (ORCID: https://orcid.org/0000-0003-1375-244X)
- L. Cáceres (ORCID: https://orcid.org/0000-0002-6237-680X)
- O. Kamalou
- J. Giovinazzo (ORCID: https://orcid.org/0000-0001-7436-8877)
- J. Lois-Fuentes (ORCID: https://orcid.org/0000-0001-8653-2523)
- C. Stödel (ORCID: https://orcid.org/0000-0003-4658-2213)
- F. de Oliveira Santos
- A. Ortega Moral
- D. Regueira-Castro
- Angel M. Sánchez-Benítez
- J. Pancin (ORCID: https://orcid.org/0000-0001-9709-6966)
- S. M. Wang (ORCID: https://orcid.org/0000-0002-5821-4875)
- D. Fernández-Domínguez
Institutions
- École Nationale Supérieure d'Ingénieurs de Caen (FR)
- Commissariat à l'Énergie Atomique et aux Énergies Alternatives (FR)
- Laboratoire de Physique Corpusculaire de Caen (FR)
- Laboratoire de Physique des deux infinis Bordeaux (FR)
- CEA Paris-Saclay (FR)
- Grand Accélérateur National d'Ions Lourds (FR)
- Institut de Recherche sur les Lois Fondamentales de l'Univers (FR)
Publication Details
- Journal
- ArXiv.org
- Published
- 2025-04-20
- Primary Topic
- Nuclear physics research studies
- Type
- article
- Field-Weighted Citation Impact
- 0.00