Constraining the Synthesis of the Lightest p Nucleus 74Se
Abstract
We provide the first experimental cross section of the reaction to constrain one of the main destruction mechanisms of the p nucleus in explosive stellar environments. The measurement was done using a radioactive beam at effective center-of-mass energies of 2.9 and 2.3 MeV/nucleon. Along with the total cross-section measurement, statistical properties of the compound nucleus were extracted, constraining the reaction cross section in the upper Gamow window of the process. The impact of the experimentally constrained reaction rate on production in Type II supernovae was investigated through Monte Carlo one-zone network simulations. The results indicate that the overproduction of Se by Type II supernova models cannot be resolved by nuclear physics alone and point toward the need for a more detailed understanding of the astrophysical conditions of relevance for the process.
Keywords
Cite
@article{arxiv.2511.20850,
title = {Constraining the Synthesis of the Lightest p Nucleus 74Se},
author = {A. Tsantiri and A. Spyrou and E. C. Good and K. Bosmpotinis and P. Giuliani and H. Arora and G. Balk and L. Balliet and H. C. Berg and J. M. Berkman and C. Dembski and P. DeYoung and P. A. Denissenkov and N. Dimitrakopoulos and A. Doetsch and T. Gaballah and R. Garg and A. Henriques and R. Jain and S. N. Liddick and S. Lyons and R. S. Lubna and B. Monteagudo Godoy and F. Montes and S. Nash and G. U. Ogudoro and J. Owens-Fryar and A. Palmisano-Kyle and J. Pereira and A. Psaltis and A. L. Richard and L. Roberti and E. K. Ronning and H. Schatz and A. Sebastian and M. Smith and M. K. Smith and C. S. Sumithrarachchi and C. Tinson and P. Tsintari and N. Tubaro and S. Uthayakumaar and A. C. C. Villari and E. Weissling and R. G. T. Zegers},
journal= {arXiv preprint arXiv:2511.20850},
year = {2025}
}
Comments
9 pages, 4 figures, 1 table, published in Physical Review Letters as DOI: https://doi.org/10.1103/d7dr-h36j