An improved photo-absorption cross section model for the physics models regime in MCNPX

Franz X. Gallmeier

doi:10.1093/rpd/nci080

An improved photo-absorption cross section model for the physics models regime in MCNPX

Franz X. Gallmeier

Neutronics Group

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

The photo-nuclear physics model capabilities utilising the CEM2k model implemented in the MCNPX code were improved >100 MeV photon energy by basing the photon transport on experimental photo-absorption cross sections of nuclides rather than on free nucleon cross sections. Below 100 MeV, the photo-nuclear physics model now uses isotope-specific giant dipole resonance (GDR) photo-absorption cross sections that are provided to the code in a parameterised form on a data file. Adjustments of the photo-fission cross sections were implemented to match the BOFOD evaluated data through a CEM2k internal parameter. The physics models with these improvements are better equipped to supplement the tabulated data based photo-nuclear MCNPX capability for isotopes with missing tabulated data evaluations especially in the GDR region, and has improved its predictive power at energies above the GDR resonances.

Original language	English
Pages (from-to)	264-269
Number of pages	6
Journal	Radiation Protection Dosimetry
Volume	116
Issue number	1-4
DOIs	https://doi.org/10.1093/rpd/nci080
State	Published - Dec 20 2005

Access to Document

10.1093/rpd/nci080

Cite this

@article{7ea3c10a2d854baeb2c9bb93915e1608,

title = "An improved photo-absorption cross section model for the physics models regime in MCNPX",

abstract = "The photo-nuclear physics model capabilities utilising the CEM2k model implemented in the MCNPX code were improved >100 MeV photon energy by basing the photon transport on experimental photo-absorption cross sections of nuclides rather than on free nucleon cross sections. Below 100 MeV, the photo-nuclear physics model now uses isotope-specific giant dipole resonance (GDR) photo-absorption cross sections that are provided to the code in a parameterised form on a data file. Adjustments of the photo-fission cross sections were implemented to match the BOFOD evaluated data through a CEM2k internal parameter. The physics models with these improvements are better equipped to supplement the tabulated data based photo-nuclear MCNPX capability for isotopes with missing tabulated data evaluations especially in the GDR region, and has improved its predictive power at energies above the GDR resonances.",

author = "Gallmeier, {Franz X.}",

year = "2005",

month = dec,

day = "20",

doi = "10.1093/rpd/nci080",

language = "English",

volume = "116",

pages = "264--269",

journal = "Radiation Protection Dosimetry",

issn = "0144-8420",

publisher = "Oxford University Press",

number = "1-4",

}

TY - JOUR

T1 - An improved photo-absorption cross section model for the physics models regime in MCNPX

AU - Gallmeier, Franz X.

PY - 2005/12/20

Y1 - 2005/12/20

N2 - The photo-nuclear physics model capabilities utilising the CEM2k model implemented in the MCNPX code were improved >100 MeV photon energy by basing the photon transport on experimental photo-absorption cross sections of nuclides rather than on free nucleon cross sections. Below 100 MeV, the photo-nuclear physics model now uses isotope-specific giant dipole resonance (GDR) photo-absorption cross sections that are provided to the code in a parameterised form on a data file. Adjustments of the photo-fission cross sections were implemented to match the BOFOD evaluated data through a CEM2k internal parameter. The physics models with these improvements are better equipped to supplement the tabulated data based photo-nuclear MCNPX capability for isotopes with missing tabulated data evaluations especially in the GDR region, and has improved its predictive power at energies above the GDR resonances.

AB - The photo-nuclear physics model capabilities utilising the CEM2k model implemented in the MCNPX code were improved >100 MeV photon energy by basing the photon transport on experimental photo-absorption cross sections of nuclides rather than on free nucleon cross sections. Below 100 MeV, the photo-nuclear physics model now uses isotope-specific giant dipole resonance (GDR) photo-absorption cross sections that are provided to the code in a parameterised form on a data file. Adjustments of the photo-fission cross sections were implemented to match the BOFOD evaluated data through a CEM2k internal parameter. The physics models with these improvements are better equipped to supplement the tabulated data based photo-nuclear MCNPX capability for isotopes with missing tabulated data evaluations especially in the GDR region, and has improved its predictive power at energies above the GDR resonances.

UR - http://www.scopus.com/inward/record.url?scp=31544473130&partnerID=8YFLogxK

U2 - 10.1093/rpd/nci080

DO - 10.1093/rpd/nci080

M3 - Article

C2 - 16604641

AN - SCOPUS:31544473130

SN - 0144-8420

VL - 116

SP - 264

EP - 269

JO - Radiation Protection Dosimetry

JF - Radiation Protection Dosimetry

IS - 1-4

ER -

An improved photo-absorption cross section model for the physics models regime in MCNPX

Abstract

Access to Document

Other files and links

Fingerprint

Cite this