Study of the N = 50 major shell effect toward $^{78}$Ni at PARRNe : Evidence of a weak-coupling structure in $^{83}_{32}$Ge_{51}

• Published in: The European physical journal. A, Hadrons and nuclei Vol. 28; pp. 307 - 312
• Main Authors: Perru, O., Verney, D., Ibrahim, F., Bajeat, O., Bourgeois, C., Clapier, F., Cottereau, E., Donzaud, C., Du, S., Ducourtieux, M., Essabaa, S., Galès, S., Guillemaud-Mueller, D., Hubert, O., Lau, C., Lefort, H., Le Blanc, F., C. Mueller, A., Obert, J., Pauwels, N., C. Potier, J., Pougheon, F., Proust, J., Roussière, B., Sauvage, J., Sorlin, O.
• Format: Journal Article
• Language: English
• Published: EDP Sciences ; Springer [1998-....] 2006
• Subjects: Nuclear Experiment; Physics; nuclear energy levels; Properties of nuclei; 59≤A≤89; Spectrometers and spectroscopic techniques; gamma transitions and level energies
• ISSN: 1434-6001; 1434-601X
• DOI: 10.1140/epja/i2005-10285-9

The γ-ray de-excitations following the β-decay of 83Ga and the β-n decay of 84Ga have been studied. The radioactive species were produced using the PARRNe on-line mass-separator installed at the IPN Orsay Tandem accelerator. Two γ-lines were attributed to 83Ge with the aid of β-γ and γ-γ coincidences. The Z identification of the γ-lines was provided by time analysis of a buid-up/decay cycle. The excited levels of 83Ge can be explained by the coupling of the single neutron state ν2d 5/2 to the first 2+ excitation of the 82Ge core.