Title :
Nonproportionality of Scintillator Detectors. V. Comparing the Gamma and Electron Response
Author :
Beck, Patrick R. ; Payne, Stephen A. ; Hunter, Steven ; Ahle, Larry ; Cherepy, Nerine J. ; Swanberg, Erik L.
Author_Institution :
Lawrence Livermore Nat. Lab., Livermore, CA, USA
fDate :
6/1/2015 12:00:00 AM
Abstract :
This paper is the fifth in a series of articles on the basic physics of light yield nonproportionality in scintillators. Here, we compare and contrast the nonproportionality as registered by gamma rays and high-energy electrons. As has been noted in the past, these two types of data have different curve shapes (for plots of the light yield against electron or gamma energy). Herein, we show how the experimental gamma nonproportionality curve can be calculated from the electron response by accounting for the distribution of high energy electrons created by the gamma photon via the photoelectric interaction. Similarly, we measure and model the gamma-induced resolution as a function of energy and compare this data to predictions from our model. The utility of the model is explored using data acquired with the scintillators SrI2(Eu), GYGAG(Ce) and CsI(Na).
Keywords :
solid scintillation detectors; CsI(Na) scintillators; GYGAG(Ce) scintillators; SrI2(Eu) scintillators; electron energy; electron response; gamma energy; gamma photon; gamma-ray response; high-energy electrons; photoelectric interaction; scintillator detectors; Charge carrier processes; Data models; Detectors; Energy resolution; Light emitting diodes; Photonics; X-rays; Gamma ray detectors; luminescence; solid scintillation detectors;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.2015.2414357