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Development of an alanine dosimeter for gamma dosimetry in mixed environments

Conference ·
OSTI ID:10185230
;
L-{alpha}a-Alanine, a nontoxic polycrystalline amino acid, has been investigated for use in high-precision, high-level absorbed-dose measurements in mixed neutron/photon environments such as research and test reactors. The technique is based on the use of electron paramagnetic resonance (EPR) spectroscopy to determine the extent of free radical production in a sample exposed to ionizing radiation, and has been successfully used for photon absorbed-dose measurements at levels exceeding 10{sup 5} Gy with high measurement precision. Application of the technique to mixed environments requires knowledge of the energy-dependent response of the dosimeter for both photons and neutrons. Determination of the dosimeter response to photons is accomplished by irradiations in {sup 60}Co and bremsstrahlung sources and by calculations of energy-dependent photon kerma. Neutron response is determined by calculations in conjunction with CaF{sub 2}:Mn thermoluminescence dosimeters and by calculations of energy-dependent neutron kerma. Several neutron environments are used, including the ACRR and SPR-III reactors.
Research Organization:
Sandia National Labs., Albuquerque, NM (United States)
Sponsoring Organization:
USDOE, Washington, DC (United States)
DOE Contract Number:
AC04-76DP00789
OSTI ID:
10185230
Report Number(s):
SAND--92-2532C; CONF-930809--3; ON: DE93040051
Country of Publication:
United States
Language:
English

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Related Subjects

440102
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
560101
560120
61 RADIATION PROTECTION AND DOSIMETRY
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ALANINE-L
DOSEMETERS
DOSIMETRY AND MONITORING
ELECTRON SPIN RESONANCE
ENERGY DEPENDENCE
GAMMA DETECTION
GAMMA RADIATION
MATERIALS
NEUTRON DETECTION
NEUTRONS
RADIATION DOSEMETERS
RADIATION DOSES
RADIATION EFFECTS ON BIOCHEMICALS, CELLS, AND TISSUE CULTURE