Development of a mid-head radiation dose response function. [Phantom determinations of neutron and. gamma. absorbed doses in mid-brain for military applications]
Abstract
Calculations have been made of the incident neutron and gamma-ray absorbed dose response as a function of energy in the mid-head position of a phantom model. The calculations were performed with the DOT discrete ordinates transport code in the adjoint mode using co-axial cylinders to represent the head and torso. Results, given in a coupled 37-neutron-group, 21-gamma-ray-group structure (37/21) and a 22-neutron-group, 18-gamma-ray-group structure (22/18), are compared with previously obtained results. The mid-head response is less than the conventional radiation protection fluence-to-dose factors which are based on maximum phantom values. In the case of a fission source in air the neutron dose is about a factor of 4 less, and the secondary gamma-ray dose is about a factor of 1.5 less. For a fusion source the neutron dose ratio varies from about 1.9 at close range to about 3. The gamma-ray dose ratio is about the same as for the fission source. Tables of the various response functions are presented in the Appendix A.
- Authors:
- Publication Date:
- Research Org.:
- Oak Ridge National Lab., TN (USA)
- OSTI Identifier:
- 6192389
- Report Number(s):
- ORNL/TM-6634
TRN: 79-008671
- DOE Contract Number:
- W-7405-ENG-26
- Resource Type:
- Technical Report
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 61 RADIATION PROTECTION AND DOSIMETRY; 63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.; 45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE; BRAIN; RADIATION DOSES; COMPUTER CODES; D CODES; GAMMA DOSIMETRY; COMPUTER CALCULATIONS; HEAD; SPATIAL DOSE DISTRIBUTIONS; NEUTRON DOSIMETRY; ENERGY DEPENDENCE; COMPILED DATA; GAMMA RADIATION; IRRADIATION; ISOLATED VALUES; MAN; NEUTRONS; NUCLEAR WEAPONS; PHANTOMS; RESPONSE FUNCTIONS; ANIMALS; BARYONS; BODY; BODY AREAS; CENTRAL NERVOUS SYSTEM; DATA FORMS; DOSES; DOSIMETRY; ELECTROMAGNETIC RADIATION; ELEMENTARY PARTICLES; FERMIONS; FUNCTIONS; HADRONS; IONIZING RADIATIONS; MAMMALS; MOCKUP; NERVOUS SYSTEM; NUCLEONS; ORGANS; PRIMATES; RADIATION DOSE DISTRIBUTIONS; RADIATIONS; STRUCTURAL MODELS; VERTEBRATES; WEAPONS; 655003* - Medical Physics- Dosimetry; 560151 - Radiation Effects on Animals- Man; 450202 - Explosions & Explosives- Nuclear- Weaponry- (-1989)
Citation Formats
Trubey, D. K., Knight, J. R., Bartine, D. E., and Pace, III, J. V. Development of a mid-head radiation dose response function. [Phantom determinations of neutron and. gamma. absorbed doses in mid-brain for military applications]. United States: N. p., 1979.
Web. doi:10.2172/6192389.
Trubey, D. K., Knight, J. R., Bartine, D. E., & Pace, III, J. V. Development of a mid-head radiation dose response function. [Phantom determinations of neutron and. gamma. absorbed doses in mid-brain for military applications]. United States. doi:10.2172/6192389.
Trubey, D. K., Knight, J. R., Bartine, D. E., and Pace, III, J. V. Thu .
"Development of a mid-head radiation dose response function. [Phantom determinations of neutron and. gamma. absorbed doses in mid-brain for military applications]". United States.
doi:10.2172/6192389. https://www.osti.gov/servlets/purl/6192389.
@article{osti_6192389,
title = {Development of a mid-head radiation dose response function. [Phantom determinations of neutron and. gamma. absorbed doses in mid-brain for military applications]},
author = {Trubey, D. K. and Knight, J. R. and Bartine, D. E. and Pace, III, J. V.},
abstractNote = {Calculations have been made of the incident neutron and gamma-ray absorbed dose response as a function of energy in the mid-head position of a phantom model. The calculations were performed with the DOT discrete ordinates transport code in the adjoint mode using co-axial cylinders to represent the head and torso. Results, given in a coupled 37-neutron-group, 21-gamma-ray-group structure (37/21) and a 22-neutron-group, 18-gamma-ray-group structure (22/18), are compared with previously obtained results. The mid-head response is less than the conventional radiation protection fluence-to-dose factors which are based on maximum phantom values. In the case of a fission source in air the neutron dose is about a factor of 4 less, and the secondary gamma-ray dose is about a factor of 1.5 less. For a fusion source the neutron dose ratio varies from about 1.9 at close range to about 3. The gamma-ray dose ratio is about the same as for the fission source. Tables of the various response functions are presented in the Appendix A.},
doi = {10.2172/6192389},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Feb 01 00:00:00 EST 1979},
month = {Thu Feb 01 00:00:00 EST 1979}
}
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Development of a mid-head tissue dose response function
The technique used in this investigation was to calculate the radiation transport in a two-dimensional adjoint model by the discrete ordinates code DOT 3.5. An S/sub 8/P/sub 3/ approximation was used. The adjoint source was taken to be the tissue kerma response in a 1-cm-radius region in the center of the head. The procedure was to then calculate in the adjoint mode the current on the surface of the phantom model. The adjoint leakage gives the response function for scoring an isotropic incident radiation field, and the exit adjoint angular flux gives the response for angular-dependent incident radiation. The headmore »