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Your search keyword '"M., Aiche"' showing total 2 results
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2 results on '"M., Aiche"'

1. Insights on the population of the superdeformed bands using the EUROGAMII – DIAMANT apparatus

Author

G. LA RANA, A. BRONDI, R. MORO, E. VARDACI, M. AICHE, M. M. ALÉONARD, G. BARREAU, D. BOIVIN, F. BOURGINE, J. F. CHEMIN, J. N. SCHEURER, D. CURIEN, G. DUCHENE, F. A. BECK, B. HAAS, J. P. VIVIEN, G. DE FRANCE, F. HANNACHI, K Yoshida, S Kubono, I Tanihata, C Signorini, LA RANA, Giovanni, Brondi, Augusto, Moro, RENATA EMILIA MARIA, Vardaci, Emanuele, M., Aiche, M. M., Aléonard, G., Barreau, D., Boivin, F., Bourgine, J. F., Chemin, J. N., Scheurer, D., Curien, G., Duchene, F. A., Beck, B., Haa, J. P., Vivien, G., DE FRANCE, and F., Hannachi

Subjects
Nuclear physics, Physics, Particle physics, education.field_of_study, superdeformed band, Population, EUROGAM, education, ancillary detector, DIAMANT
Abstract

Experiments to study the decay of hot composite nuclei have been carried out with EUROGAM II γ-ray spectrometer, coupled to the DIAMANT charged-particle detector, at the VIVITRON accelerator at IReS in Strasbourg. Some relevant aspects related to the population of superdeformed bands have been addressed, on the basis of very exclusive data. We present the results for the composite nuclei 90Ru and 160Er produced in the reactions 120, 130 MeV 32S + 58Ni, and 191 MeV 37Cl + 123Sb, at excitation energies Ex≅ 55, 61 and 92 MeV, respectively Evidence is given of effects related to the angular momentum as well as to the location of the entry region.

Published
2003

2. Insight on the Compound Nucleus Decay via the p-alpha channel

Author

VARDACI, EMANUELE, BRONDI, AUGUSTO, LA RANA, GIOVANNI, MORO, RENATA EMILIA MARIA, F. Bourgine, D. Cabaussel, D. Boivin, M. Aiche, M. M. Aleonard, G. Barreau, J. F. Chemin, T. P. Doan, J. P. Goudour, M. Harston, J. N. Scheurer, A. Principe, D. Curien, Y. Oganessian, R. Kalpakchieva, Vardaci, Emanuele, F., Bourgine, D., Cabaussel, D., Boivin, M., Aiche, M. M., Aleonard, G., Barreau, J. F., Chemin, T. P., Doan, J. P., Goudour, M., Harston, J. N., Scheurer, Brondi, Augusto, LA RANA, Giovanni, Moro, RENATA EMILIA MARIA, A., Principe, and D., Curien

Subjects
gamma array, statistical model, compound nucleus decay, gamma-particle coincidences
Abstract

The decay of Ru-90 compound nucleus via the p-alpha channel (about 1% of the fusion cross-section) was studied using the 4pi light charged-particle detector DIAMANT coupled to the gamma-ray spectrometer EUROGAM-II. The high selectivity of the apparatus allowed the determination of the total kinetic energy of the two particles with good statistics. Particle energy spectra and angular correlations have been analysed as a function of the excitation energy of the entry states and compared to statistical model calculations. As the excitation energy of the entry states increases, the mean energy carried out by the protons remains almost constantwhereas the one of the alpha particle decreases. This behaviour is well reproduced by the evaporation code LILITA_N85, which predicts a strong correlation between the excitation energy and the angular momentum of the evaporation residues. This findings could help to enhance the population of superdeformed bands by using the total kinetic energy of the two particles as a gating condition.

Published
1998

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