Skip to main content
OSTI.GOVU.S. Department of Energy Office of Scientific and Technical Information
U.S. Department of Energy
Office of Scientific and Technical Information
 

Depth-dose relationships near the skin resulting from parallel beams of fast neutrons

Journal Article · · Radiat. Res.; (United States)
DOI:https://doi.org/10.2307/3575074· OSTI ID:6157809
;

Monte Carlo calculations were undertaken to permit comparison of kerma and absorbed dose within the first 0.5 cm of penetration of fast neutrons incident normally on a tissue slab phantom. Various neutron energies from 0.1 to 20 MeV were considered. Dose-equivalent values were also calculated. It was shown that only for incident neutron energies of 5 MeV and above is there any marked difference between absorbed dose and kerma (in equivalent units). The variation is shown to be due largely to lack of equilibrium for recoil protons until the penetration distance equal to the range of the most energetic proton is reached. Skin absorbed dose for 14-Mev incident neutrons, for example, is calculated to be about 38% of the kerma (in equivalent units). This is somewhat lower than the experimental figure previously published, but qualitative trends are similar.

Research Organization:
Univ. of Illinois, Urbana
OSTI ID:
6157809
Journal Information:
Radiat. Res.; (United States), Journal Name: Radiat. Res.; (United States) Vol. 77:1; ISSN RAREA
Country of Publication:
United States
Language:
English

Similar Records

Calculation of fast neutron depth-dose in the ICRU standard tissue phantom and the derivation of neutron fluence-to-dose-index conversion factors
Journal Article · Fri Jun 01 00:00:00 EDT 1979 · Radiat. Res.; (United States) · OSTI ID:6146428
Personal dose equivalent conversion coefficients for neutron fluence over the energy range of 20 to 250 MeV
Journal Article · Wed Dec 31 23:00:00 EST 2008 · Radiation Protection Dosimetry · OSTI ID:956589
THE VARIATION OF NEUTRON DOSE WITH DEPTH IN A TISSUE-EQUIVALENT PHANTOM
Journal Article · Sun Jul 01 00:00:00 EDT 1962 · Phys. in Med. Biol. · OSTI ID:4820437

Related Subjects

560151 -- Radiation Effects on Animals-- Man
61 RADIATION PROTECTION AND DOSIMETRY
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
655003* -- Medical Physics-- Dosimetry
BARYONS
BODY
DATA
DATA FORMS
DEPTH DOSE DISTRIBUTIONS
DOSE EQUIVALENTS
DOSES
DOSIMETRY
ELEMENTARY PARTICLES
ENERGY RANGE
EXPERIMENTAL DATA
FAST NEUTRONS
FERMIONS
GRAPHS
HADRONS
INFORMATION
IRRADIATION
KERMA
KEV RANGE
KEV RANGE 100-1000
MEV RANGE
MEV RANGE 01-10
MEV RANGE 10-100
MOCKUP
MONTE CARLO METHOD
NEUTRON DOSIMETRY
NEUTRONS
NUCLEONS
NUMERICAL DATA
ORGANS
PHANTOMS
RADIATION DOSE DISTRIBUTIONS
RADIATION DOSES
SKIN
SPATIAL DOSE DISTRIBUTIONS
STRUCTURAL MODELS
TISSUE-EQUIVALENT MATERIALS