Modification and benchmarking of MCNP for low-energy tungsten spectra

J. R. Mercier, D. T. Kopp, W. D. McDavid, S. B. Dove, J. L. Lancaster, D. M. Tucker

Research output: Contribution to journalArticlepeer-review

24 Scopus citations


The MCNP Monte Carlo radiation transport code was modified for diagnostic medical physics applications. In particular, the modified code was thoroughly benchmarked for the production of polychromatic tungsten x-ray spectra in the 30-150 kV range. Validating the modified code for coupled electron-photon transport with benchmark spectra was supplemented with independent electron-only and photon-only transport benchmarks. Major revisions to the code included the proper treatment of characteristic K x-ray production and scoring, new impact ionization cross sections, and new bremsstrahlung cross sections. Minor revisions included updated photon cross sections, electron-electron bremsstrahlung production, and K x-ray yield. The modified MCNP code is benchmarked to electron backscatter factors, x-ray spectra production, and primary and scatter photon transport.

Original languageEnglish (US)
Pages (from-to)2680-2687
Number of pages8
JournalMedical physics
Issue number12
StatePublished - 2000


  • Benchmarking
  • MCNP
  • Monte Carlo
  • X-ray spectra

ASJC Scopus subject areas

  • Biophysics
  • Radiology Nuclear Medicine and imaging


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