Accession Number : ADA194615

Title :   A Method of Determining Neutron Dose to a Human Phantom.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING

Personal Author(s) : Archuleta, Michael G

PDF Url : ADA194615

Report Date : Mar 1988

Pagination or Media Count : 62

Abstract : This report describes a computer method of determining absorbed neutron dose to a human phantom. Modifications to the Oak Ridge National Laboratory MORSE Monte Carlo code result in a code capable of estimating absorbed dose on a human phantom in the standing position. The phantom organs analyzed are the skin, bone, brain, gastro-intestinal tract, and all remaining tissue. The organ choices are limited to organs capable of incapacitating a human. The code allows for five different source direction configurations that simulate neutrons, of any specified energy distribution, incident on the phantom. MORSE analysis of a fission neutron spectrum on the phantom produces absorbed dose estimates comparable with Japanese atomic bomb survivor dose estimates by Scientific Applications International Corporation. The analysis of 24,000 source neutrons requires less than 15 central processing unit minutes on a VAX 11/780 computer (VMS operating system). Although the code is currently usable, additional phantom model orientations, energy-dependent quality factors, and implementation of secondary gamma-ray dose estimation could greatly improve the flexibility and usefulness. Theses; Radiation effects; Radiation absorption.

Descriptors :   *NEUTRONS, *RADIATION DOSAGE, *COMPUTER APPLICATIONS, *MONTE CARLO METHOD, BRAIN, COMPUTERS, CONFIGURATIONS, ENERGY, ESTIMATES, FISSION NEUTRONS, GAMMA RAYS, GASTROINTESTINAL SYSTEM, INTERNATIONAL, MORSE CODE, NEUTRON SPECTRUM, ORGANS(ANATOMY), RADIATION ABSORPTION, RADIATION EFFECTS, SECONDARY, SOURCES, THESES, ANATOMICAL MODELS

Subject Categories : Radiobiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE