Modification and benchmarking of MCNP for low-energy tungsten spectra.

Abstract:

: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.

journal_name

Med Phys

journal_title

Medical physics

authors

Mercier JR,Kopp DT,McDavid WD,Dove SB,Lancaster JL,Tucker DM

doi

10.1118/1.1288397

subject

Has Abstract

pub_date

2000-12-01 00:00:00

pages

2680-7

issue

12

eissn

0094-2405

issn

2473-4209

journal_volume

27

pub_type

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