Clarifying the radiative decay of the Hoyle state with charged-particle spectroscopy

Dell’Aquila, Daniele; Lombardo, I.; Redigolo, L.; Vigilante, M.; Angelini, F.; Baldesi, L.; Barlini, S.; Best, A.; Camaiani, A.; Casini, G.; Ciampi, C.; Cicerchia, M.; D’Andrea, M.; Diklić, Josipa; Fabris, D.; Gongora Servin, B.; Gottardo, A.; Gramegna, F.; Imbriani, G.; Marchi, T.; Massara, A.; Mengoni, D.; Ordine, A.; Palada, Luka; Pasquali, G.; Piantelli, S.; Pilotto, E.; Rapagnani, D.; Sigmund, Margareta; Stefanini, D.; Stramaccioni, D.; Tagnani, D.; Tišma, Isabela; Valdre, S.; Verde, G.; Vukman, Nikola (2024) Clarifying the radiative decay of the Hoyle state with charged-particle spectroscopy. Scientific Reports, 14 (1). ISSN 2045-2322

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Abstract

A detailed knowledge of the decay properties of the so-called Hoyle state in the 12C nucleus (Ex=7.654MeV, 0+) is required to calculate the rate at which carbon is forged in typical red-giant stars. This paper reports on a new almost background-free measurement of the radiative decay branching ratio of the Hoyle state using advanced charged particle coincidence techniques. The exploitation, for the first time in a similar experiment, of a bi-dimensional map of the coincidence efficiency allows to reach a unitary value and, consequently, to strongly reduce sources of systematic uncertainties. The present results suggest a value of the radiative branching ratio of Γrad/Γtot=4.4(6)⋅10−4. This finding helps to resolve the tension between recent data published in the literature.

Item Type:	Article
Uncontrolled Keywords:	nuclear physics; experimental nuclear physics; Hoyle state; radiative decay
Subjects:	NATURAL SCIENCES > Physics
Divisions:	Division of Experimental Physics
Projects:	Project title Project leader Project code Project type Potpora vrhunskim istraživanjima Centra izvrsnosti za napredne materijale i senzore- Mile Ivanda; Milko Jakšić; Mario Stipčević; Marko Kralj KK.01.1.1.01.0001 EK Zemljovid atomskih jezgara - neutronski bogata strana-NeRiS-Land Suzana Szilner IP-2018-01-1257 HRZZ
Depositing User:	Lorena Palameta
Date Deposited:	14 Nov 2024 10:19
URI:	http://fulir.irb.hr/id/eprint/9287
DOI:	10.1038/s41598-024-68415-6

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