Theory of RBE. Progress report, 1 January 1976--31 December 1976
Experimental studies of emulsion-processing combinations have demonstrated that a range of hittedness, from 1 to 8-or-more, can be achieved with specially processed nuclear research emulsions of the Ilford K series, encompassing the range of supralinear response displayed by biological cells. In analogy with the response of biological cells to high LET radiations, the processes of ion-kill and gamma-kill have been displayed for these emulsions, in that x-rays blacken emulsion in circumstances that single alpha-particles, or even single fission fragments, leave no visible track. Track structure theory and the theory of RBE have been extended to these multi-hit detectors. Supralinearity in thermoluminescent dosimeters has been tentatively identified as due to a population of 2-or-more hit trapping sites, coexisting with the linear 1-or-more hit sites. Inferences from this identification that the response to high-LET radiations is linear and that 2-hit sites must display an RBE greater than 1 are consistent with some experimental observations. This is a second solid state detector having the capacity to mimic the response of biological systems identified from the theory of RBE.
- Research Organization:
- Nebraska Univ., Lincoln (USA)
- OSTI ID:
- 7137385
- Report Number(s):
- COO-1671-71
- Country of Publication:
- United States
- Language:
- English
Similar Records
Supralinearity of nuclear research emulsions. [Mimics radiation response of biological systems]
Theory of RBE. Progress report, January 1, 1977--December 1977. [X Radiation, Electrons, Neutrons, Gamma Radiation]
Related Subjects
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
560121* -- Radiation Effects on Cells-- External Source-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ALPHA PARTICLES
ANIMAL CELLS
BIOLOGICAL EFFECTS
BIOLOGICAL RADIATION EFFECTS
CHARGED PARTICLES
DOSEMETERS
DOSIMETRY
ELECTROMAGNETIC RADIATION
ENERGY LOSSES
ENERGY TRANSFER
GAMMA RADIATION
IONIZING RADIATIONS
LET
LUMINESCENT DOSEMETERS
MEASURING INSTRUMENTS
MICRODOSIMETRY
NUCLEAR EMULSIONS
PHOTOGRAPHIC FILM DOSEMETERS
RADIATION DOSE DISTRIBUTIONS
RADIATION EFFECTS
RADIATIONS
RBE
SPATIAL DOSE DISTRIBUTIONS
THERMOLUMINESCENT DOSEMETERS
X RADIATION