Practical neutron dosimetry with superheated drops
The Superheated Drop Detector (SDD) is a new kind of neutron detector based on the same principle as that of the bubble chamber, except the superheated material is in drop form suspended by a gel or polymer as first described by Apfel. Previously, we have developed a theoretical model for the prediction of the threshold neutron energy to nucleate bubbles in our superheated materials and a model for the calculation of the energy dependent response function of SDD. The results of the theoretical calculations agree with the experimental measurements reasonably well. We found the measured response curve of one of our SDDs follows the same trend as the ideal ICRP dose equivalent response curve within 40% for neutrons of energy above 100 keV and within a factor of 10 below 100 keV. Therefore, it is possible to make a rem-response Superheated Drop Detector. We have further calibrated our SDD with /sup 252/Cf neutron sources (both bare and D/sub 2/O moderated). The results are in reasonable agreement with our theoretical predictions, which proves that our model is valid not only for monoenergetic neutrons but also for neutrons from a radioactive source. The principles of operation of our detector, which can be used in neutron dosimetry, area monitoring, and neutron spectrometry, are discussed.
- Research Organization:
- Yale Univ., New Haven, CT (USA)
- OSTI ID:
- 6544063
- Journal Information:
- Health Phys.; (United States), Journal Name: Health Phys.; (United States) Vol. 56:1; ISSN HLTPA
- Country of Publication:
- United States
- Language:
- English
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46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALPHA DECAY RADIOISOTOPES
BARYONS
CALIBRATION
CALIFORNIUM 252
CALIFORNIUM ISOTOPES
DEUTERIUM
DOSE EQUIVALENTS
DOSIMETRY
ELEMENTARY PARTICLES
EVEN-EVEN NUCLEI
FERMIONS
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HEAVY NUCLEI
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LIGHT NUCLEI
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NEUTRON DETECTORS
NEUTRON DOSIMETRY
NEUTRON SOURCES
NEUTRONS
NUCLEI
NUCLEONS
ODD-ODD NUCLEI
PARTICLE SOURCES
RADIATION DETECTORS
RADIATION SOURCES
RADIOISOTOPES
STABLE ISOTOPES
YEARS LIVING RADIOISOTOPES