Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

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

Published

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

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 June 5, 2023)
Created April 1, 2021, Updated December 7, 2022