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Recent developments of the Cascade-Exciton Model (CEM) of nuclear reactions are described. The improved cascade-exciton model as implemented in the code CEM97 differs from the CEM95 version by incorporating new approximations for the…

Nuclear Theory · Physics 2010-05-27 Stepan G. Mashnik , Arnold J. Sierk

For the past several years, a major effort has been undertaken at Los Alamos National Laboratory (LANL) to develop the transport code MCNP6, the latest LANL Monte-Carlo transport code representing a merger and improvement of MCNP5 and…

Nuclear Experiment · Physics 2015-06-05 S. G. Mashnik , J. S. Bull , H. G. Hughes , R. E. Prael , A. J. Sierk

MCNP6, the latest and most advanced LANL transport code representing a recent merger of MCNP5 and MCNPX, has been Validated and Verified (V&V) against a variety of intermediate and high-energy experimental data and against results by…

Nuclear Theory · Physics 2011-07-19 Stepan G. Mashnik

Recent developments of the Cascade-Exciton Model (CEM) of nuclear reactions are briefly described. These changes are motivated by new data on isotope production measured recently in "reverse kinematics" at GSI for interactions of 208-Pb and…

Nuclear Theory · Physics 2007-05-23 Stepan G. Mashnik , Arnold J. Sierk

An extended version of the Cascade-Exciton Model (CEM) of nuclear reactions is applied to analyze nucleon-induced fission cross sections for Bi-209 and Pb-208 nuclei in the 45-500 MeV energy range. The available data on linear momentum…

Nuclear Theory · Physics 2007-05-23 A. V. Prokofiev , S. G. Mashnik , A. J. Sierk

Fragmentation reactions induced on light target nuclei by protons and light nuclei of energies around 1 GeV/nucleon and below are studied with the latest Los Alamos Monte Carlo transport code MCNP6 and with its cascade-exciton model (CEM)…

Nuclear Theory · Physics 2015-06-19 Stepan G. Mashnik , Leslie M. Kerby

Recent improvements to the Cascade-Exciton Model (CEM) of nuclear reactions are briefly described. They concern mainly the cascade stage of reactions and a better description of nuclei during the preequilibrium and evaporation stages of…

Nuclear Theory · Physics 2007-05-23 Stepan G. Mashnik , Arnold J. Sierk

An improved version of the Cascade-Exciton Model (CEM) of nuclear reactions realized in the code CEM2k and the Los Alamos version of the Quark-Gluon String Model (LAQGSM) have been developed recently at LANL to describe reactions induced by…

Nuclear Theory · Physics 2009-11-11 S. G. Mashnik , A. J. Sierk , K. K. Gudima , M. I. Baznat

A brief description of our improvements and refinements that led from the CEM95 version of the Cascade-Exciton Model (CEM) code to CEM97 and to CEM2k is given. The increased accuracy and predictive power of the code CEM2k are shown by…

Nuclear Theory · Physics 2007-05-23 Stepan G. Mashnik , Arnold J. Sierk , Konstantin K. Gudima

An improved version of the Cascade-Exciton Model (CEM) of nuclear reactions implemented in the codes CEM2k and the Los Alamos version of the Quark-Gluon String Model (LAQGSM) has been developed recently at LANL to describe reactions induced…

Nuclear Theory · Physics 2009-11-11 S. G. Mashnik , K. K. Gudima , A. J. Sierk , R. E. Prael

MCNP6 has been Validated and Verified (V&V) against intermediate- and high-energy fission cross-section experimental data. An error in the calculation of fission cross sections of 181Ta and a few nearby target nuclei by the CEM03.03 event…

Nuclear Theory · Physics 2013-03-19 Stepan G. Mashnik , Arnold J. Sierk , Richard E. Prael

Recent developments of the Cascade-Exciton Model (CEM) of nuclear reactions to describe high energy particle induced fission are briefly described. The increased accuracy and predictive power of the CEM are shown by several examples.…

Nuclear Theory · Physics 2007-05-23 Arnold J. Sierk , Stepan G. Mashnik

The production of heavy clusters in nuclear reactions is important in a wide variety of applications: radiation shielding, space engineering and design, medical physics, accelerator design, and more. According to the Cascade Exciton Model…

Nuclear Theory · Physics 2015-03-03 Leslie M. Kerby , Stepan G. Mashnik

Fragmentation reactions induced on light and medium nuclei by protons and light nuclei of energies around 1 GeV/nucleon and below are studied with the Los Alamos transport code MCNP6 and with its CEM03.03 and LAQGSM03.03 event generators.…

Nuclear Theory · Physics 2016-06-22 Stepan G. Mashnik , Leslie M. Kerby

Isotope production cross sections from the 500 MeV p + 136Xe interactions measured recently at GSI in inverse kinematics have been simulated with MCNP6 using the CEM03.03 event generator. MCNP6 reproduces reasonably well most of the…

Nuclear Theory · Physics 2013-11-20 Stepan G. Mashnik

Realistic nuclear reaction cross-section models are an essential ingredient of reliable heavy-ion transport codes. Such codes are used for risk evaluation of manned space exploration missions as well as for ion-beam therapy dose…

Nuclear Theory · Physics 2021-10-27 F Luoni , F Horst , CA Reidel , A Quarz , L Bagnale , L Sihver , U Weber , RB Norman , W de Wet , M Giraudo , G Santin , J Norbury , M Durante

We have used an extended version of the Cascade-Exciton Model (CEM) to analyze more than 600 excitation functions for proton induced reactions on 19 targets ranging from C-12 to Au-197, for incident energies ranging from 10 MeV to 5 GeV. We…

Nuclear Theory · Physics 2015-06-26 S. G. Mashnik , A. J. Sierk , O. Bersillon , T. Gabriel

We systematically study total reaction cross sections of carbon isotopes with N=6-16 on a proton target for wide range of incident energies, putting an emphasis on the difference from the case of a carbon target. The analysis includes the…

Nuclear Theory · Physics 2014-11-18 B. Abu-Ibrahim , W. Horiuchi , A. Kohama , Y. Suzuki

For calculation of cross sections for collisional transitions between rotational levels in a molecule, a computer code, MOLSCAT has been developed by Hutson \& Green (1994). For the transitions between rotational levels in H$_2$CS due to…

Instrumentation and Methods for Astrophysics · Physics 2016-08-03 M. K. Sharma , Monika Sharma , Suresh Chandra

Nucleon total reaction and neutron total cross sections to 300 MeV for 12C and 208Pb, and for 65 MeV spanning the mass range, are predicted using coordinate space optical potentials formed by full folding of effective nucleon-nucleon…

Nuclear Theory · Physics 2009-11-07 P. K. Deb , K. Amos , S. Karataglidis , M. B. Chadwick , D. G. Madland
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