Cross-section measurements of (α, γ) reactions on zinc isotopes using the 4π γ-summing method for astrophysics applications

Harissopulos, S.; Provatas, Georgios; Foteinou, V.; Axiotis, M.; Becker, H.-W.; Lagoyannis, A.; Vagena, E.; Dimitriou, P. (2025) Cross-section measurements of (α, γ) reactions on zinc isotopes using the 4π γ-summing method for astrophysics applications. European Physical Journal Plus, 140 (5). ISSN 2190-5444

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Abstract

The cross sections of the (alpha, gamma) reactions on 64Zn, 66Zn, and 68Zn were measured using the 4 pi gamma-summing method at center-of-mass energies relevant to the p-process nucleosynthesis, ranging from 4.756 to 9.352 MeV, with isotopically enriched targets. The paper also reports the analysis procedure for the current and previous measurements, through which the uncertainty of the absolute efficiency of the employed 4 pi gamma-summing NaI(Tl) detector was significantly reduced to approximate to 4%. This allowed for testing existing global models of the alpha-particle-nucleus optical model potential with increased sensitivity. The experimental cross-section data and resulting astrophysical S factors were compared with corresponding statistical model calculations performed using version 2.0 of the nuclear reaction code TALYS. The conclusions drawn from this comparison are presented and discussed. Additionally, the reaction rates of the three reactions investigated were calculated and compared with well-established and widely used reaction-rate databases.

Item Type:	Article
Uncontrolled Keywords:	(alpha,gamma) reactions; p-process nucleosynthesis; cross sections
Subjects:	NATURAL SCIENCES > Physics
Divisions:	Division of Experimental Physics
Depositing User:	Ana Zečević
Date Deposited:	08 Apr 2026 11:04
URI:	http://fulir.irb.hr/id/eprint/11615
DOI:	10.1140/epjp/s13360-025-06303-2

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