REVISION OF THE 252Cf AND D2O-MODERATED 252Cf REFERENCE NEUTRON FIELDS FOR USE IN RADIATION PROTECTION DOSIMETRY

Published

April 1, 2021

Author(s)

Alan Keith Thompson, D. J. Thomas, Roberto Bedogni, Jose M. Gomez-Ros, Roberto Mendez

Abstract

ISO Standard 8529–1:2001 on Reference neutron radiations is under revision. The spectral data for the D2O-moderated 252Cf field in the 2001 version of the standard refer to calculations performed in the early 80s. There are changes in the revised standard, and these arise from updated calculations, described in this paper, based on a new 252Cf spectrum (from ENDF/B-VIII.0) and the MCNP6.2 transport code with ENDF/B-VIII.0 cross sections. In addition, the impact of different possible construction details of the D2O-moderated 252Cf assembly is provided. Lastly, in view of the need to perform irradiations of dosemeters on-phantom, the variation of spectrum and fluence across a 30 cm × 30 cm surface placed 100 cm from the source has been evaluated.

Citation

Radiation Physics and Chemistry

Volume

184

Pub Type

Journals

Download Paper

https://doi.org/10.1016/j.radphyschem.2021.109433

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Keywords

neutron standards, MCNP, simulation, standard radiation fields, neutron, radiation, dose

Citation

Thompson, A. , Thomas, D. , Bedogni, R. , Gomez-Ros, J. and Mendez, R. (2021), REVISION OF THE 252Cf AND D2O-MODERATED 252Cf REFERENCE NEUTRON FIELDS FOR USE IN RADIATION PROTECTION DOSIMETRY, Radiation Physics and Chemistry, [online], https://doi.org/10.1016/j.radphyschem.2021.109433, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=930573 (Accessed December 3, 2024)