Four α-particles as a final state of 16O* Quasi Projectile decay

Maria Vittoria Managlia; Mauro Bruno; Michela D’Agostino; Luca Morelli; Giorgio Baiocco; Francesca Gulminelli; Catalin Frosin; Sandro Barlini; Antonio Buccola; Alberto Camaiani; Giovanni Casini; Magda Cicerchia; Marco Cinausero; Daniela Fabris; Fabiana Gramegna; Giorgia Mantovani; Tommaso Marchi; Pietro Ottanelli; Gabriele Pasquali; Silvia Piantelli; Simone Valdré

doi:10.1051/epjconf/201922301036

All issues

Volume 223 (2019)

EPJ Web Conf., 223 (2019) 01036

Abstract

Open Access

Issue		EPJ Web Conf. Volume 223, 2019 IV International Conference on Nuclear Structure and Dynamics (NSD2019)


Article Number		01036
Number of page(s)		2
Section		Contributions
DOI		https://doi.org/10.1051/epjconf/201922301036
Published online		04 December 2019

EPJ Web of Conferences 223, 01036 (2019)
https://doi.org/10.1051/epjconf/201922301036

Four α-particles as a final state of ¹⁶O^* Quasi Projectile decay

Maria Vittoria Managlia¹, Mauro Bruno¹^,2, Michela D’Agostino¹^,2, Luca Morelli¹^,2, Giorgio Baiocco³, Francesca Gulminelli⁴, Catalin Frosin⁵^,6, Sandro Barlini⁵^,6, Antonio Buccola⁵^,6, Alberto Camaiani⁵^,6, Giovanni Casini⁶, Magda Cicerchia⁷, Marco Cinausero⁷, Daniela Fabris⁸, Fabiana Gramegna⁷, Giorgia Mantovani⁷, Tommaso Marchi⁷, Pietro Ottanelli⁵^,6, Gabriele Pasquali⁵^,6, Silvia Piantelli⁶ and Simone Valdré⁶

¹ Dipartimento di Fisica e Astronomia dell’Università di Bologna, Italy
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

Abstract

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 ⁸Be_gs 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.

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