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

Journal Article · Sat Jan 01 04:00:00 EST 1983 · Med. Phys.; (United States)

DOI:https://doi.org/10.1118/1.595377· OSTI ID:6507672

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. Key words: neutron--gamma spectra, spectrometry, kerma distributions, coupled multigroup calculations

• Research Organization: Nuclear Engineering Teaching Laboratory, Mechanical Engineering Department, The University of Texas at Austin, Austin, Texas 78712
• OSTI ID: 6507672
• 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
CALIBRATION
CORRECTIONS
DOSIMETRY
ENERGY SPECTRA
GAMMA DOSIMETRY
GAMMA SPECTRA
KERMA
MEASURING INSTRUMENTS
MOCKUP
NEUTRON DOSIMETRY
NEUTRON SPECTRA
PHANTOMS
RADIATION DETECTORS
RECOILS
SCINTILLATION COUNTERS
SLABS
SPECTRA
STRUCTURAL MODELS