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Proceedings Paper

Physics of scintillator nonproportionality
Author(s): S. A. Payne; S. Hunter; B. W. Sturm; N. J. Cherepy; L. Ahle; S. Sheets; S. Dazeley; W. W. Moses; G. Bizarri
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Paper Abstract

Scintillator nonproportionality is a key mechanism by which the energy resolution is degraded in gamma spectroscopy. Herein, we survey the results obtained for a number of inorganic scintillating materials, including alkali and multivalent halides, fluorides, simple oxides, silicates, and a tungstate. The results are interpreted in the context of a model that accounts for carrier attraction by the Onsager mechanism and exciton-exciton annihilation by the Birks model. We then utilize the theory of Landau fluctuations in combination with the fitted experimental nonproportionality curves to deduce the predicted value of the resolution degradation.

Paper Details

Date Published: 27 September 2011
PDF: 7 pages
Proc. SPIE 8142, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XIII, 814210 (27 September 2011); doi: 10.1117/12.895969
Show Author Affiliations
S. A. Payne, Lawrence Livermore National Lab. (United States)
S. Hunter, Lawrence Livermore National Lab. (United States)
B. W. Sturm, Lawrence Livermore National Lab. (United States)
N. J. Cherepy, Lawrence Livermore National Lab. (United States)
L. Ahle, Lawrence Livermore National Lab. (United States)
S. Sheets, Lawrence Livermore National Lab. (United States)
S. Dazeley, Lawrence Livermore National Lab. (United States)
W. W. Moses, Lawrence Berkeley National Lab. (United States)
G. Bizarri, Lawrence Berkeley National Lab. (United States)


Published in SPIE Proceedings Vol. 8142:
Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XIII
Larry A. Franks; Ralph B. James; Arnold Burger, Editor(s)

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