Microscopic modeling of direct pre-equilibrium emission: Impact on exclusive and inclusive (n,xn) and fission channels

Dupuis, Marc; Capote, Roberto; Kawano, Toshihiko; Kerveno, Maëlle; Dessagne, Philippe; Henning, Grégoire; Hilaire, Stéphane

doi:10.1051/epjconf/202429204003

Title: Microscopic modeling of direct pre-equilibrium emission: Impact on exclusive and inclusive (n,xn) and fission channels

Journal Article · 13 March 2024 · EPJ Web of Conferences (Online)

DOI: https://doi.org/10.1051/epjconf/202429204003 · OSTI ID:2570887

Dupuis, Marc ^[1]; Capote, Roberto ^[2];

^[3]; Kerveno, Maëlle ^[4]; Dessagne, Philippe ^[4]; Henning, Grégoire ^[4]; Hilaire, Stéphane ^[1]

CEA, DAM, DIF, Arpajon (France); Univ. Paris-Saclay, Bruyères-Le-Châtel (France); Alternative Energies and Atomic Energy Commission (CEA), Bruyères-Le-Châtel (France). Laboratoire Matière sous Conditions Extrêmes (LMCE)
International Atomic Energy Agency (IAEA), Vienna (Austria)
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
University of Strasbourg (France); Centre National de la Recherche Scientifique (CNRS), Strasbourg (France). Hubert Curien Multidisciplinary Inst. (IPHC)

We report on a microscopic modeling of the first order of multistep direct emission based on one phonon excitations, given by the QRPA model, and an effective in-medium nucleon nucleon interaction, described within the JLM folding model. The results of our coupled channels framework for deformed target are illustrated in the case of low energy discrete state excitations in ¹⁵²Sm. Pre-equilibrium predictions and their impact on inclusive and exclusive (n,xn) cross sections and fission cross sections are discussed for actinides. We discuss the importance of i) collective excitations to describe the neutron emission spectra and of ii) spin distribution of the residual nucleus formed after the neutron pre-equilibrium emission, that is a key ingredient to model the residual nucleus decay.

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC)

Grant/Contract Number:: 89233218CNA000001

OSTI ID:: 2570887

Report Number(s):: LA-UR-25-23422; 2100-014X; 10.1051/epjconf/202429204003

Journal Information:: EPJ Web of Conferences (Online), Journal Name: EPJ Web of Conferences (Online) Vol. 292; ISSN 2100-014X

Publisher:: EDP SciencesCopyright Statement

Country of Publication:: United States

Language:: English

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