Design and application of a damage-track neutron dosimeter useable in the 1 eV to 17 MeV neutron energy region
Thesis/Dissertation
·
OSTI ID:5592458
This research has led to the development of a neutron damage-track dosimeter useable, and approximately rem-responding, in the neutron energy region between 1 eV and 17 MeV. The dosimeter response is a function of a selectively filtered neutron-induced alpha track density and the neutron-induced recoil track density recorded in 400 ..mu..m, low background (7 tracks/cm/sup 2/) CR-39 polymer foils. The alpha particles are generated in an external /sup 6/LiF.-Teflon radiator disc by the /sup 6/Li(n,..cap alpha..)/sup 3/H reaction. The neutron-induced damage-tracks amplified in the detector foils by an optimum combined etching technique as determined in this research. The combined etch consists of a two hour chemical etch in 45 percent KOH at 60/sup 0/C that is followed by a two and one-half hour electrochemical etch in 45 percent KOH at 25/sup 0/C, 2 kHz, and 23 kV/cm. The dose response of the dosimeter has been determined in various neutron spectra that have average neutron energies ranging from 2 keV to 17 MeV. The reseach also describes an investigation of photoneutron contamination in high energy medical therapy accelerator x-ray beams. Three types of damage-track dosimeters were utilized to measure the additional dose deposited in the patient treatment volume from not only those photoneutrons produced in the high Z accelerator components but also the photoneutrons produced by the elemental constituents of tissue within the patient.
- Research Organization:
- Georgia Inst. of Tech., Atlanta (USA)
- OSTI ID:
- 5592458
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
440102* -- Radiation Instrumentation-- Radiation Dosemeters
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ALPHA PARTICLES
CHARGED PARTICLES
DOSEMETERS
DOSIMETRY
ENERGY RANGE
ETCHING
EV RANGE
KEV RANGE
MEASURING INSTRUMENTS
MEV RANGE
MEV RANGE 01-10
NEUTRON DOSIMETRY
PARTICLE TRACKS
SPECIFICATIONS
SURFACE FINISHING
USES
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ALPHA PARTICLES
CHARGED PARTICLES
DOSEMETERS
DOSIMETRY
ENERGY RANGE
ETCHING
EV RANGE
KEV RANGE
MEASURING INSTRUMENTS
MEV RANGE
MEV RANGE 01-10
NEUTRON DOSIMETRY
PARTICLE TRACKS
SPECIFICATIONS
SURFACE FINISHING
USES