@inproceedings{7f73f2e921544dfb892c983239f0bb90,
title = "Temperature effects of resonance scattering for epithermal neutrons in MCNP",
abstract = "Epithermal neutron elastic scattering can be significantly affected by the thermal motion of target nuclides. Since the 1950s continuous-energy Monte Carlo codes have generally accounted for the target motion using a free gas scattering model, with the assumption that the scattering cross-section is constant in energy. Recent work has shown the importance of resonance scattering, and several methods for an improved free-gas treatment have been developed. We have implemented a rejection-based sampling scheme in the MCNP free-gas treatment to account for cross-section variation. The modified MCNP code was used to investigate a number of practical concerns: results for an LWR Doppler defect benchmark; computational costs; and energy limits for the free-gas treatment. Additionally, the impact on a suite of ICSBEP criticality benchmark problems (at room temperature) was determined to be negligible, an important result since such problems are used extensively in testing and evaluating revisions to ENDF/B-VII nuclear data.",
keywords = "Elastic scatter, Free gas, Monte Carlo",
author = "Sunny, {E. E.} and Brown, {F. B.} and Kiedrowski, {B. C.} and Martin, {W. R.}",
year = "2012",
language = "English",
isbn = "9781622763894",
series = "International Conference on the Physics of Reactors 2012, PHYSOR 2012: Advances in Reactor Physics",
pages = "803--811",
booktitle = "International Conference on the Physics of Reactors 2012, PHYSOR 2012",
note = "International Conference on the Physics of Reactors 2012: Advances in Reactor Physics, PHYSOR 2012 ; Conference date: 15-04-2012 Through 20-04-2012",
}