Four α-particles as a final state of 16O* Quasi Projectile decay
Dipartimento di Fisica e Astronomia dell’Università di Bologna,
2 INFN Sezione di Bologna, Bologna, Italy
3 Dipartimento di Fisica dell’Università, Pavia, Italy
4 Normandie Univ. ENSICAEN, UNICAEN, CNRS/IN2P3, LPC Caen, 14000, Caen, France
5 Dipartimento di Fisica e Astronomia dell’Università di Firenze, Italy
6 INFN Sezione di Firenze, Firenze, Italy
7 INFN, Laboratori Nazionali di Legnaro, Legnaro, Italy
8 INFN Sezione di Padova, Padova, Italy
Published online: 4 December 2019
Four α-particles as a final state of 16O* quasi-projectile decayproduced in peripheral 16O+12C reactions at 130 MeV is thoroughly studied. The differentdecay channels leading to the four α-particles final state are reconstructed by carrying out an event-by-event analysis of α correlations in the population of intermediate 8Be and 12C. Although small, a non negligible contribution due to 8Begs evaporation is found.A comparison between predictions of an accurate Hauser-Feshbach decay code and branching ratios of the different decay channels is performed. Significant deviations are observed, among these the Hoyle state population which is considerably lower than the one predicted according to the statistical model, thus suggesting possible structure effects in the Coulomb barrier and/or in the transmission coefficients.
© The Authors, published by EDP Sciences, 2019
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