Recent data on fusion far below the barrier for 12C + 28Si

Gadea, A.; Montagnoli, G.; Del Fabbro, M.; Stefanini, A. M.; Balogh, M.; Goasduff, A.; Andreetta, G.; Angelini, F.; Benito, J.; Bonhomme, A.; Brugnara, D.; Colucci, G.; Corradi, L.; Courtin, S.; Depalo, R.; Ertoprak, A.; Fioretto, E.; Galtarossa, F.; Servin, B. Gongora; Gottardo, A.; Gozzelino, A.; Heine, M.; Mazzocco, M.; Mengoni, D.; Million, B.; Monpribat, E.; Del Alamo, R. Nicolas; Pellumaj, J.; Vidal, R.M. Perez; Pigliapoco, S.; Pilotto, E.; Polettini, M.; Rezynkina, K.; Rocchini, M.; Stramaccioni, D.; Szilner, Suzana; Trzcinska, A.; Valiente Dobón, J.J.; Zagon, L.; Zanon, I. (2025) Recent data on fusion far below the barrier for 12C + 28Si. In: Gadea, A.; Algora, A.; Morales, A.; Jungclaus, A.; Dominguez, FB.; Domingo-Pardo, C.; Nacher, E.; Vidal, RMP; Orrigo, SA; Gonzalez, V., (eds.) V INTERNATIONAL CONFERENCE ON NUCLEAR STRUCTURE AND DYNAMICS, NSD2024. .

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Abstract

Heavy-ion fusion reactions are essential to investigate the fundamental problem of quantum tunnelling of many-body systems in the presence of intrinsic degrees of freedom. Studying the fusion of light systems with Q > 0 and possibly identifying the hindrance phenomenon, requires challenging measurements. Investigating slightly heavier cases allows a reliable extrapolation towards the lighter astrophysical systems. We measured the fusion excitation function of 12C + 28Si down to hundreds of nanobarns, using 28Si beams from the XTU Tandem accelerator of LNL. The charged particles evaporated after the fusion process were detected by two DSSDs around the target. The prompt γ-rays emitted by the evaporation residues (ER) were detected by the γ-spectrometer AGATA. The fusion cross-sections are obtained from the coincident events between γ-rays and charged particles. The light-charged particles have been identified through pulse shape analysis, using the rise time, vs their energy Epart. The main transitions from the ER have been identified, and the fusion cross section is obtained by the number of coincident γ-particle events for all observed evaporation channels. Neutron evaporation is calculated to be limited to a few per cent for this system in the measured energy range. Preliminary analyses provide promising results in studying fusion cross sections for light systems at deep sub-barrier energies.

Item Type:	Conference or workshop item published in conference proceedings (UNSPECIFIED)
Uncontrolled Keywords:	heavy-ion fusion; quantum tunnelling; light nuclear systems
Subjects:	NATURAL SCIENCES > Physics
Divisions:	Division of Experimental Physics
Depositing User:	Ema Buhin Šaler
Date Deposited:	10 Apr 2026 13:35
URI:	http://fulir.irb.hr/id/eprint/11651
DOI:	10.1051/epjconf/202532400008

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