Alpha structure of 16O at high excitation energy via 3He + 13C nuclear reactions

Ivano Lombardo; Luigi Redigolo; Daniele Dell’Aquila; Mariano Vigilante; Mualla Ayketin; Lucia Baldesi; Sandro Barlini; Alberto Camaiani; Giovanni Casini; Caterina Ciampi; Daniela Fabris; Magda Cicerchia; Catalin Frosin; Fabiana Gramegna; Tommaso Marchi; Antonio Ordine; Pietro Ottanelli; Gabriele Pasquali; Silvia Piantelli; Marco Russo; Andrea Stefanini; Simone Valdrè; Giuseppe Verde

doi:10.1051/epjconf/202532400013

All issues

Volume 324 (2025)

EPJ Web Conf., 324 (2025) 00013

Abstract

Open Access

Issue		EPJ Web Conf. Volume 324, 2025 V International Conference on Nuclear Structure and Dynamics (NSD2024)


Article Number		00013
Number of page(s)		4
DOI		https://doi.org/10.1051/epjconf/202532400013
Published online		11 April 2025

EPJ Web of Conferences 324, 00013 (2025)
https://doi.org/10.1051/epjconf/202532400013

Alpha structure of ¹⁶O at high excitation energy via ³He + ¹³C nuclear reactions

Ivano Lombardo¹^,2^*, Luigi Redigolo¹^,2, Daniele Dell’Aquila²^,4, Mariano Vigilante²^,4, Mualla Ayketin⁵, Lucia Baldesi⁶^,7, Sandro Barlini⁶^,7, Alberto Camaiani⁶^,7, Giovanni Casini⁶^,7, Caterina Ciampi⁶^,7, Daniela Fabris⁸, Magda Cicerchia⁵^,8, Catalin Frosin⁶^,7, Fabiana Gramegna⁹, Tommaso Marchi⁹, Antonio Ordine⁶^,7, Pietro Ottanelli⁶^,7, Gabriele Pasquali⁶^,7, Silvia Piantelli⁷, Marco Russo¹^,2, Andrea Stefanini⁶^,7, Simone Valdrè⁷ and Giuseppe Verde²

¹ Dipartimento di Fisica e Astronomia ”Ettore Majorana”, Università di Catania, Via S. Sofia, Catania, 95123, Italy
² Istituto Nazionale di Fisica Nucleare, Sezione di Catania, Via S. Sofia, Catania, 95123, Italy
³ Dipartimento di Fisica ”E. Pancini”, University of Naples Federico II, Via Cintia, Naples, 80126, Italy
⁴ Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, Via Cintia, Naples, 80126, Italy
⁵ Dipartimento di Fisica e Astronomia, University of Padova, Via Marzolo, Padua, 30020, Italy
⁶ Dipartimento di Fisica, University of Firenze, Via G. Sansone, Sesto Fiorentino (FI), 50019, Italy
⁷ Istituto Nazionale di Fisica Nucleare, Sezione di Firenze, Via G. Sansone, Sesto Fiorentino (FI), 50019, Italy
⁸ Istituto Nazionale di Fisica Nucleare, Sezione di Padova, Via Marzolo, Padua, 30020, Italy
⁹ Istituto Nazionale di Fisica Nucleare, Lab. Nazionali di Legnaro, Via dell’Università, Legnaro (PD), 35020, Italy

^* e-mail: ivano.lombardo@ct.infn.it

Published online: 11 April 2025

Abstract

These proceedings report a new data analysis aimed to the study of low-spin, high excitation energy states in the spectroscopy of the ¹⁶O nucleus around 24 MeV excitation energy. After a careful spectroscopical analysis, based on the Legendre polynomials decomposition of angular distribution data obtained in ³He+¹³C reactions at low energies, it was possible to determine the J^π assignments for two high-lying states at E_x ≈ 24.1 and ≈ 24.5 MeV. Some conclusions are also drawn regarding the presence of pronounced 4α structure of these states, based on the analysis of the branching ratios of the α₂ to the α₀ channels in the ¹⁶O compound nucleus decay.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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