Neutron detection with single crystal organic scintillators

Journal Article · Wed Jul 15 04:00:00 EDT 2009 · SPIE Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XI, vol. 7449, N/A, January 9, 2009, pp. 744911-(1-10)

OSTI ID:966911

Zaitseva, N; Newby, J; Hamel, S; Carman, L; Faust, M; Lordi, V; Cherepy, N; Stoeffl, W; Payne, S

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.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA
• Sponsoring Organization: USDOE
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 966911
• Report Number(s): LLNL-JRNL-414904
• Journal Information: SPIE Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XI, vol. 7449, N/A, January 9, 2009, pp. 744911-(1-10), Journal Name: SPIE Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XI, vol. 7449, N/A, January 9, 2009, pp. 744911-(1-10) Vol. 7449
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL PROTECTION
BIBENZYL
COMPUTERS
CRYSTAL GROWTH
DETECTION
EXCITONS
GAMMA RADIATION
LIQUID SCINTILLATORS
MONOCRYSTALS
NEUTRON DETECTION
NEUTRONS
PHOSPHORS
SIMULATION
STILBENE