The use of neutron and gamma ray spectral measurements and calculations to obtain dosimetric information for DT neutrons

Journal Article · · Med. Phys.; (United States)

DOI:https://doi.org/10.1118/1.595377· OSTI ID:5635877

Hertel, N E; Murphie, W E

Neutron and gamma ray energy spectra were measured using an NE-213 scintillator at depths of 7.2, 15.2, and 22.2 cm in a tissue-equivalent phantom which was uniformly irradiated on one face by deuterium-tritium (DT) neutrons. Coupled neutron-gamma ray multigroup discrete ordinates calculations were performed using semi-infinite slab geometry. These calculations were used to supplement the measured spectra below 1 MeV. Similar calculations were performed to study the perturbation in the phantom due to the detector. The measured and calculated spectra were used to determine the kerma distributions for neutrons and gamma rays at each location. The gamma radiation was determined to contribute more than 10% of the total dose at each depth. The calculated kerma also reveals that a knowledge of the gamma ray spectra below 1 MeV is desirable.

• Research Organization: Mechanical Engineering Department, University of Texas at Austin
• OSTI ID: 5635877
• Journal Information: Med. Phys.; (United States), Journal Name: Med. Phys.; (United States) Vol. 10:1; ISSN MPHYA
• Country of Publication: United States
• Language: English

Related Subjects

61 RADIATION PROTECTION AND DOSIMETRY
655003* -- Medical Physics-- Dosimetry
BARYONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CALCULATION METHODS
DEUTERIUM
DOSIMETRY
ELEMENTARY PARTICLES
FERMIONS
GAMMA SPECTRA
HADRONS
HYDROGEN ISOTOPES
ISOTOPES
KERMA
LIGHT NUCLEI
MOCKUP
NEUTRON DOSIMETRY
NEUTRON SPECTRA
NEUTRONS
NUCLEI
NUCLEONS
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
PHANTOMS
RADIOISOTOPES
SPECTRA
STABLE ISOTOPES
STRUCTURAL MODELS
TRITIUM
YEARS LIVING RADIOISOTOPES