NDLI: Comparison of dose estimates using the buildup-factor method and a baryon transport code (bryntrn) with monte carlo results

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Comparison of dose estimates using the buildup-factor method and a baryon transport code (bryntrn) with monte carlo results

Content Provider	NASA Technical Reports Server (NTRS)
Author	Wilson, John W. Nealy, John E. Shinn, Judy L. Cucinotta, Francis A.
Copyright Year	1990
Description	Continuing efforts toward validating the buildup factor method and the BRYNTRN code, which use the deterministic approach in solving radiation transport problems and are the candidate engineering tools in space radiation shielding analyses, are presented. A simplified theory of proton buildup factors assuming no neutron coupling is derived to verify a previously chosen form for parameterizing the dose conversion factor that includes the secondary particle buildup effect. Estimates of dose in tissue made by the two deterministic approaches and the Monte Carlo method are intercompared for cases with various thicknesses of shields and various types of proton spectra. The results are found to be in reasonable agreement but with some overestimation by the buildup factor method when the effect of neutron production in the shield is significant. Future improvement to include neutron coupling in the buildup factor theory is suggested to alleviate this shortcoming. Impressive agreement for individual components of doses, such as those from the secondaries and heavy particle recoils, are obtained between BRYNTRN and Monte Carlo results.
File Size	810631
Page Count	32
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19900019974
Archival Resource Key	ark:/13960/t5s808q18
Language	English
Publisher Date	1990-10-01
Access Restriction	Open
Subject Keyword	Space Radiation Protons Particle Production Neutrons Radiation Shielding High Energy Interactions Extraterrestrial Radiation Health Physics Monte Carlo Method Estimates Radiation Dosage Computer Programs Radiation Transport Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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