Delayed Coincidence Time Resolution: NaI(Tl)
- 1 June 1970
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Nuclear Science
- Vol. 17 (3), 390-404
- https://doi.org/10.1109/tns.1970.4325718
Abstract
For delayed coincidence experiments using NaI(Tl) scintillation counters, first photoelectron triggering (FPET) has been practicable since the advent of the RCA 8575. Using FPET, improved time resolution at low y ray energies was first demonstrated by Lynch, who also described his results by a model that fails to take into account the photomultiplier response. Using FPET, we have done systematic experiments from 6-511 keV for three different crystal sizes. We describe our results quantitatively by a simple model that takes into account the statistics of photoelectron production and the photomultiplier response, similar to El-Wahab and Kane. From the model calculations, we conclude that with present photomultipliers and NaI(Tl) scintillators, further improvements in resolution cannot be expected. The major difficulty is not the light output of NaI(Tl), but the single electron response of the photomultiplier.Keywords
This publication has 11 references indexed in Scilit:
- Time-Differential Perturbed Angular-Correlation Experiment forin a Ni Host, and a Comparison with the Mössbauer EffectPhysical Review B, 1969
- A method of determining the absolute scintillation efficiency of an NaI(Ti) crystal for gamma raysNuclear Instruments and Methods, 1969
- Direct measurement of the primary photoelectron yield in sodium iodide scintillation countersNuclear Instruments and Methods, 1968
- A search for a fast decay component in NaI(Tl); An evaluation of the RCA 8575 photomultiplier tubeNuclear Instruments and Methods, 1967
- Review of theories and experiments of resolving time with scintillation countersNuclear Instruments and Methods, 1966
- Time resolution measurements with XP 1020 photomultipliersNuclear Instruments and Methods, 1966
- Zeitauflösungseigenschaften von NaJ-SzintillatorenNuclear Instruments and Methods, 1965
- An analytic treatment for scintillation counter time resolution functionsNuclear Instruments and Methods, 1962
- Measurements of instrumental time delay and resolution in a fast coincidence systemNuclear Instruments and Methods, 1961
- Statistical Limitations on the Resolving Time of a Scintillation CounterPhysical Review B, 1950