Title :
Effects of scintillation light collection on the time resolution of a time-of-flight detector for annihilation quanta
Author :
Ziegler, Sibylle I. ; Ostertag, Hermann ; Kuebler, Wolfgang K. ; Lorenz, Walter J. ; Otten, Ernst W.
Author_Institution :
Inst. fuer Radiol. & Pathophysiol., Deutsches Krebsforschungszentrum, Heidelberg, West Germany
fDate :
4/1/1990 12:00:00 AM
Abstract :
Monte Carlo methods were used to simulate the production and collection of scintillation light in a BaF2 crystal. The calculated results were compared to measured values for detectors with different heights. Based on this simulation, a TOF (time-of-flight) detector consisting of two conical BaF2 crystals (base radius 18 mm, top radius 15 mm, height 25 mm) was assembled. The total time resolution of this system was (210±5) ps FWHM (full width at half maximum) for 511-keV annihilation quanta and was found to be independent of the source position between the detectors. Since the time resolution of the TOF detector system consisting of two conical BaF2 crystals is sufficiently constant in the volume of interest and does not change during operation, this detector meets the requirements for application in a clinical routine
Keywords :
Monte Carlo methods; barium compounds; gamma-ray detection and measurement; radioisotope scanning and imaging; scintillation counters; time of flight spectrometers; BaF2 crystal; Monte Carlo methods; annihilation quanta; clinical routine; scintillation light collection; time resolution; time-of-flight detector; Cathodes; Gamma ray detection; Monte Carlo methods; Photomultipliers; Photonic crystals; Production; Shape measurement; Solid scintillation detectors; Spatial resolution; Time measurement;
Journal_Title :
Nuclear Science, IEEE Transactions on
