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Proceedings Paper

Neutron detection with single crystal organic scintillators
Author(s): Natalia P. Zaitseva; Jason Newby; Sebastien Hamel; Leslie Carman; Michelle Faust; Vincenzo Lordi; Nerine J. Cherepy; Wolfgang Stoeffl; Stephen A. Payne
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Paper Abstract

Detection of high-energy neutrons in the presence of gamma radiation background utilizes pulse-shape discrimination (PSD) phenomena in organics studied previously only with limited number of materials, mostly liquid scintillators and single crystal stilbene. The current paper presents the results obtained with broader varieties of luminescent organic single crystals. The studies involve experimental tools of crystal growth and material characterization in combination with the advanced computer modeling, with the final goal of better understanding the relevance between the nature of the organic materials and their PSD properties. Special consideration is given to the factors that may diminish or even completely obscure the PSD properties in scintillating crystals. Among such factors are molecular and crystallographic structures that determine exchange coupling and exciton mobility in organic materials and the impurity effect discussed on the examples of trans-stilbene, bibenzyl, 9,10- diphenylanthracene and diphenylacetylene.

Paper Details

Date Published: 12 September 2009
PDF: 10 pages
Proc. SPIE 7449, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XI, 744911 (12 September 2009); doi: 10.1117/12.829870
Show Author Affiliations
Natalia P. Zaitseva, Lawrence Livermore National Lab. (United States)
Jason Newby, Lawrence Livermore National Lab. (United States)
Sebastien Hamel, Lawrence Livermore National Lab. (United States)
Leslie Carman, Lawrence Livermore National Lab. (United States)
Michelle Faust, Lawrence Livermore National Lab. (United States)
Vincenzo Lordi, Lawrence Livermore National Lab. (United States)
Nerine J. Cherepy, Lawrence Livermore National Lab. (United States)
Wolfgang Stoeffl, Lawrence Livermore National Lab. (United States)
Stephen A. Payne, Lawrence Livermore National Lab. (United States)


Published in SPIE Proceedings Vol. 7449:
Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XI
Ralph B. James; Larry A. Franks; Arnold Burger, Editor(s)

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