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Abstract The$$^{90}$$ Zr(p,$$\gamma $$ )$$^{91}$$ Nb reaction is one of the important reactions in the$$A\approx 90$$ mass region and part of the nucleosynthesis path responsible for production of$$^{92}$$ Mo during the$$\gamma $$ -process. Discrepant data in the literature provide a cross section that varies up to 30% within the Gamow window for the$$^{90}$$ Zr(p,$$\gamma $$ )$$^{91}$$ Nb reaction. Thus, the cross section measurements of$$^{90}$$ Zr(p,$$\gamma $$ )$$^{91}$$ Nb reaction were revisited using the$$\gamma $$ -summing technique. The results are consistent with the lower-value cross sections found in the literature. Based on the new data an updated reaction rate for$$^{90}$$ Zr(p,$$\gamma $$ )$$^{91}$$ Nb is provided that is up to 20% higher than that obtained from thenon-smokercode.
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Abstract The20Ne(α,p)23Na reaction rate is important in determining the final abundances of various nuclei produced in type Ia supernovae. Previously, the ground state cross section was calculated from time reversal reaction experiments using detailed balance. The reaction rates extracted from these studies do not consider contributions from the population of excited states, and therefore, are only estimates. A resonance scan, populating both the ground and first excited states, was performed for the20Ne(α,p)23Na reaction, measuring between 2.9 and 5 MeV center of mass energies at the Nuclear Science Lab at the University of Notre Dame. Data analysis is underway and preliminary results show substantial contribution from the excited state reaction.more » « less
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Abstract Neutron-induced nuclear reactions play an important role in the Big Bang Nucleosynthesis. Their excitation functions are, from an experimental point of view, usually difficult to measure. Nevertheless, in the last decades, big efforts have led to a better understanding of their role in the primordial nucleosynthesis network. In this work, we apply the Trojan Horse Method to extract the cross section at astrophysical energies for the3He(n,p)3H reaction after a detailed study of the2H(3He,pt)H three-body process. Data extracted from the present measurement are compared with other published sets. The reaction rate is also calculated, and the impact on the Big Bang nucleosynthesis is examined in detail.more » « lessFree, publicly-accessible full text available November 1, 2025
