Conférences et séminaires » Séminaire présenté par Stepan Mashnik

Séminaire présenté par Stepan Mashnik

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Intermediate and High-Energy Models of Nuclear Reactions

Stepan Mashnik
(Los Alamos National Laboratory)

Mercredi 22 octobre à 16h00

Salle séminaires Bât 27 / 2e étage
IPHC, 23 rue du Loess, Strasbourg-Cronenbourg
ATTENTION lieu inhabituel !

Résumé :

Reliable models of intermediate and high energy nuclear reactions are important to a number of applications, including projects such as the Accelerator Transmutation of nuclear Wastes (ATW), Accelerator Production of Tritium (APT), Spallation Neutron Source (SNS), Rare Isotope Accelerator (RIA), Proton Radiography (PRAD) as a radiographic probe for the Advanced Hydro-test Facility, NASA needs, and others. During the last years we have made substantial progress in the development of improved versions of the Cascade-Exciton Model (CEM) and of the Los Alamos version of the Quark Gluon String Model (LAQGSM) which has led to our intermediate and high-energy event generators CEM03.03 and LAQGSM03.03 for the transport codes MCNP6, MCNPX, and MARS15.

I shall discuss some recent research to improve our nuclear reaction models. I will, in particular, present a description of the Intra-Nuclear Cascade (INC), preequilibrium, evaporation, fission, coalescence, and Fermi breakup models used by the latest versions of our CEM03.03 and LAQGSM03.03 event generators, with a focus on our most recent developments of these models. The recently developed versions of our codes, that consider multifragmentation of nuclei formed after the preequilibrium stage of reactions when their excitation energy is above 2 A MeV using the Statistical Multifragmentation Model (SMM) code by Botvina, and the fission-like binary-decay model GEMINI will be briefly discussed as well. Examples of benchmarking our models against a large variety of experimental data on particle-particle, particle-nucleus, and nucleus-nucleus reactions will be presented. Open questions on reaction mechanisms and future necessary work will be outlined.

Personnes à contacter :

Sandrine COURTIN

Florent HAAS