Theory developements for obtaining neutron capture information from surrogate reactions
ORAL · Invited
Abstract
Neutron capture cross sections play an important role in stellar nucleosynthesis and thus are critical to our understanding of the formation of neutron-rich nuclei heavier than iron. However, the direct measurements of the reaction cross sections needed for such nuclear astrophysics simulations are often difficult - especially when the nuclei of interest are unstable. The surrogate reaction method is an approach that uses indirect reaction measurements and nuclear reaction theory to infer the capture cross sections [1,2]. In this talk, I will focus on theory developments for direct proton inelastic scattering as the surrogate mechanism to use integrated structure and reaction theory [3] in order to improve decay modeling in the Hauser Feshbach formalism. I will share my thoughts on the limitations of the current framework and highlight the scope for future improvements.
*This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344, with partial support from LDRD projects 20-ERD-030 and 19-ERD-017.
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Publication:1. J. E. Escher, J. T. Burke, R. O. Hughes, N. D. Scielzo, R. J. Casperson, S. Ota, H. I. Park, A. Saastamoinen, and T. J. Ross, Phys. Rev. Lett. 121, 052501 (2018) 2. A. Ratkiewicz, J. A. Cizewski, J. E. Escher, G. Potel, J. T. Harke, R. J. Casperson, M. McCleskey, R. A. E. Austin, S. Burcher, R. O. Hughes, B. Manning, S. D. Pain, W. A. Peters, S. Rice, T. J. Ross, N. D. Scielzo, C. Shand, and K. Smith, Phys. Rev. Lett. 122, 052502 (2019) 3. A. Thapa, J. E. Escher, E. Chimanski, M. Dupuis, S. Péru, and W.Younes, EPJ Web of Conferences 292, 06003 (2024)
Presenters
Aaina Thapa
Lawrence Livermore National Laboratory
Authors
Aaina Thapa
Lawrence Livermore National Laboratory
Jutta E Escher
Lawrence Livermore National Laboratory
Emanuel V Chimanski
Brookhaven National Laboratory (BNL)
Marc Dupuis
CEA, DAM, DIF, F-91297 Arpajon, France and Universit ́e Paris-Saclay, CEA, France
Eun Jin In
Lawrence Livermore National Laboratory
Walid Younes
Lawrence Livermore National Laboratory
Sophie Péru
CEA, DAM, DIF, F-91297 Arpajon, France and Universit ́e Paris-Saclay, CEA, France