Feasibility study for use of a germanium detector in the LOFT gamma-ray densitometer
The primary aim of this study is to predict the performance of a gamma-ray densitometer system using computer modeling techniques. The system consists of a collimated /sup 137/Cs source, a pipe containing a variable amount of water absorber, and a shielded and collimated germanium detector system. The gamma-ray energy spectrum (number of photon counts as a function of energy) has been computed for several sources at the detector. The response for combined sourceconfigurations has been obtained by linear superposition. The signal essentially consists of the counts in an energy window centered on the /sup 137/Cs source at 662 keV that originate from this source. The noise is the background counts in the signal energy window that originate from /sup 16/N scatter radiation and direct and shield tank activation gammas. The detector signal has been computed for 0, 50, and 100 percent water in the pipe. (WHK)
- Research Organization:
- California Univ., Livermore (USA). Lawrence Livermore Lab.
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 7263663
- Report Number(s):
- UCID-17111
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
220600 -- Nuclear Reactor Technology-- Research
Test & Experimental Reactors
440105* -- Radiation Instrumentation-- Radiometric Instruments-- (-1987)
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ALKALI METAL ISOTOPES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CESIUM 137
CESIUM ISOTOPES
DENSIMETERS
ELECTROMAGNETIC RADIATION
GAMMA RADIATION
GAMMA SOURCES
GE SEMICONDUCTOR DETECTORS
IONIZING RADIATIONS
ISOTOPES
LI-DRIFTED DETECTORS
LI-DRIFTED GE DETECTORS
LOFT REACTOR
MEASURING INSTRUMENTS
NUCLEI
ODD-EVEN NUCLEI
PERFORMANCE
PWR TYPE REACTORS
RADIATION DETECTORS
RADIATION SOURCES
RADIATIONS
RADIOISOTOPES
RADIOMETRIC GAGES
REACTOR INSTRUMENTATION
REACTORS
RESEARCH AND TEST REACTORS
SEMICONDUCTOR DETECTORS
SIMULATION
TANK TYPE REACTORS
TEST REACTORS
WATER COOLED REACTORS
WATER MODERATED REACTORS
YEARS LIVING RADIOISOTOPES
220600 -- Nuclear Reactor Technology-- Research
Test & Experimental Reactors
440105* -- Radiation Instrumentation-- Radiometric Instruments-- (-1987)
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ALKALI METAL ISOTOPES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CESIUM 137
CESIUM ISOTOPES
DENSIMETERS
ELECTROMAGNETIC RADIATION
GAMMA RADIATION
GAMMA SOURCES
GE SEMICONDUCTOR DETECTORS
IONIZING RADIATIONS
ISOTOPES
LI-DRIFTED DETECTORS
LI-DRIFTED GE DETECTORS
LOFT REACTOR
MEASURING INSTRUMENTS
NUCLEI
ODD-EVEN NUCLEI
PERFORMANCE
PWR TYPE REACTORS
RADIATION DETECTORS
RADIATION SOURCES
RADIATIONS
RADIOISOTOPES
RADIOMETRIC GAGES
REACTOR INSTRUMENTATION
REACTORS
RESEARCH AND TEST REACTORS
SEMICONDUCTOR DETECTORS
SIMULATION
TANK TYPE REACTORS
TEST REACTORS
WATER COOLED REACTORS
WATER MODERATED REACTORS
YEARS LIVING RADIOISOTOPES