Implementation of the CEM-Code into the MCNPX-Code

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In the development stage of improving the physics abilities of MCNPX, the CEM code has been implemented into MCNPX as the nuclear reaction model for nuclei and pion induced reactions up to 5 GeV of kinetic energy. The CEM code includes all the reaction stages of intra:nuclear cascade, preequilibrium and equilibrium and is an alternative for the existing MCNPX models. The preliminary implementation fixes the uncompleted fission model of CEM by applying the RAL fission fragmentation model and provides a parameterized formula for the CEM input parameter a{sub f}/a{sub n}, the ratio of level density parameters at the fission saddle ... continued below

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9 Pages

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Gallmeier, F.X. September 13, 1998.

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Description

In the development stage of improving the physics abilities of MCNPX, the CEM code has been implemented into MCNPX as the nuclear reaction model for nuclei and pion induced reactions up to 5 GeV of kinetic energy. The CEM code includes all the reaction stages of intra:nuclear cascade, preequilibrium and equilibrium and is an alternative for the existing MCNPX models. The preliminary implementation fixes the uncompleted fission model of CEM by applying the RAL fission fragmentation model and provides a parameterized formula for the CEM input parameter a{sub f}/a{sub n}, the ratio of level density parameters at the fission saddle point shape and the compound shape of the excited nucleus. All the deficiencies are addressed in an improved CEM code that will replace the existing implementation when finished. Thick target calculations employing lead and tungsten targets have been performed to validate the implementation and test the CEM models against the old MCNPX models.

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9 Pages

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  • SARE4 (Simulating Accelerator Radiation Environments) Conf., Knoxville, TN, Sept. 13-16, 1998

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  • Other: DE00002934
  • Report No.: ORNL/CP-100297
  • Grant Number: AC05-96OR22464
  • Office of Scientific & Technical Information Report Number: 2934
  • Archival Resource Key: ark:/67531/metadc686185

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  • September 13, 1998

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • Nov. 4, 2015, 2:07 p.m.

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Gallmeier, F.X. Implementation of the CEM-Code into the MCNPX-Code, article, September 13, 1998; United States. (digital.library.unt.edu/ark:/67531/metadc686185/: accessed September 26, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.