Scintillation fiber detector for in-vivo endoscopic internal dosimetry
Technical Report
·
OSTI ID:6707293
This document reports on a feasibility study to design and construct a scintillation fiber radiation detector for in-vivo endoscopic internal dosimetry. The instrument design utilizes an alpha/beta particle-sensitive plastic scintillation fiber to detect and measure internally deposited radionuclides that cannot be suitably assayed using other techniques. Scintillations are optically guided to a photomultiplier for detection. The computerized electronics provides preamplification, amplification, analog-to-digital conversion and storage in a multi-channel analyzer. The microcomputer provides data storage, retrieval, and graphical display. Alpha detection and attenuation were conducted with a calibrated P/sub 0/-210 source. Ten scintillation fibers of varying diameters (0.5--3 mm) and properties were tested to determine their relative sensitivity for alpha particle detection as a function of distance of the source to the photomultiplier tube. The sensitivity in counts per minute was approximately proportional to the diameter of the fiber for samples of the same composition and manufacturer. 20 refs., 8 figs., 3 tabs.
- Research Organization:
- Nuclear Regulatory Commission, Washington, DC (USA). Div. of Regulatory Applications; Center for Planning and Research, Inc., Palo Alto, CA (USA)
- OSTI ID:
- 6707293
- Report Number(s):
- NUREG/CR-5223; ON: TI89002029
- 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
560160 -- Radionuclide Effects
Kinetics
& Toxicology
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ALPHA DETECTION
ALPHA DOSIMETRY
CALIBRATION
CHARGED PARTICLE DETECTION
DATA
DESIGN
DETECTION
DOSIMETRY
EFFICIENCY
FEASIBILITY STUDIES
FIBERS
IN VIVO
INFORMATION
INTERNAL IRRADIATION
IRRADIATION
MEASURING INSTRUMENTS
NATIONAL ORGANIZATIONS
NUMERICAL DATA
OPTICAL FIBERS
RADIATION DETECTION
RADIATION DETECTORS
SCINTILLATION COUNTERS
SOLID SCINTILLATION DETECTORS
US NRC
US ORGANIZATIONS
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
560160 -- Radionuclide Effects
Kinetics
& Toxicology
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ALPHA DETECTION
ALPHA DOSIMETRY
CALIBRATION
CHARGED PARTICLE DETECTION
DATA
DESIGN
DETECTION
DOSIMETRY
EFFICIENCY
FEASIBILITY STUDIES
FIBERS
IN VIVO
INFORMATION
INTERNAL IRRADIATION
IRRADIATION
MEASURING INSTRUMENTS
NATIONAL ORGANIZATIONS
NUMERICAL DATA
OPTICAL FIBERS
RADIATION DETECTION
RADIATION DETECTORS
SCINTILLATION COUNTERS
SOLID SCINTILLATION DETECTORS
US NRC
US ORGANIZATIONS