https://doi.org/10.1140/epjp/s13360-025-06303-2
Regular Article
Cross-section measurements of (
, 
) reactions on zinc isotopes using the 4
-summing method for astrophysics applications
1
TANDEM Laboratory, Institute of Nuclear and Particle Physics, NCSR “Demokritos”, 153.10 Aghia Paraskevi, Athens, Greece
2
Rujer Bošković Institute, Bijenička Cesta 54, 10000, Zagreb, Croatia
3
RUBION, Ruhr-Universität Bochum, Universitätsstraße 150, 44801, Bochum, Germany
4
Nuclear Data Section, NAPC, IAEA, PO Box 100, Wagramer Straße 5, 1400, Vienna, Austria
Received:
31
January
2025
Accepted:
5
April
2025
Published online:
11
May
2025
The cross sections of the (, ) reactions on 64Zn, 66Zn, and 68Zn were measured using the 4-summing method at center-of-mass energies relevant to the 
-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-summing NaI(Tl) detector was significantly reduced to 
4%. This allowed for testing existing global models of the -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.
© The Author(s) 2025
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