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Some aspects of scintillation mechanism in organic molecular dielectrics
Galunov, N.Z.,Grinev, B.V.,Tarasenko, O.A.,Martynenko, E.V. The Korean Association for Radiation Protection 2005 방사선방어학회지 Vol.30 No.2
Aspects of the scintillation mechanism in organic systems obtained on the base of precise measurements of the radioluminescence pulse shape are discussed. It shown that the process of scintillation light pulse formation is mainly determined by initial conditions of exited states generation.
New Effective Organic Scintillators for Fast Neutron and Short-Range Radiation Detection
Budakovsky, S.V.,Galunov, N.Z.,Karavaeva, N.L.,Jong Kyung Kim,Yong Kyun Kim,Tarasenko, O.A.,Martynenko, E.V. Professional Technical Group on Nuclear Science 2007 IEEE transactions on nuclear science Vol.54 No.6
<P>This paper describes the techniques used for making new organic scintillators and detectors based on these scintillators. Research has focused on designing large dimension organic scintillators to increase the efficiency of detecting ionizing radiation. The techniques described here have allowed us to produce (1) organic crystals of stilbene and p-terphenyl with diameters up to 120 mm and heights up to 100 mm; (2) p-terphenyl polycrystals doped with diphenylbutadiene molecules, as well stilbene polycrystals up to 250 mm in diameter and 5 mm in height; (3) the first prototypes of a composite scintillation material based on stilbene grains added to a silicone glue base, achieving a high efficiency of fast neutron detection.</P>
Development of large-area composite stilbene scintillator for fast neutron detection
Lee, S.K.,Son, J.B.,Jo, K.H.,Kang, B.H.,Kim, G.D.,Seo, H.,Park, S.H.,Galunov, N.Z.,Kim, Y.K. Atomic Energy Society of Japan 2014 Journal of nuclear science and technology Vol.51 No.1
Fast neutron applications have gained popularity with the growth of fast neutron production facilities. Covering a larger area and/or wider angle can be one of the advantages of a fast neutron detector. In the present study, a large-area composite stilbene scintillator with the dimensions of 200mm (D) x 20mm (H) was fabricated to examine its scintillation properties and to evaluate its applicability to fast neutron detection. The detector response of small- and large-area composite stilbene scintillators for neutrons and gamma rays was measured and compared with that of commercial and small single-crystal stilbene scintillators. To this end, the response of each scintillator was measured for radioisotopes as well as mono-energetic neutrons generated by a Tandem accelerator. The neutron-gamma separation performance of the large-area composite stilbene scintillator was evaluated in terms of figure-of-merit (FoM) using the digital pulse shape discrimination method. The composite stilbene scintillator showed good energy linearity, as determined from its recoil proton spectra, with reasonable n- separation capability. The results indicated that the composite stilbene scintillator could be applied to the field of fast neutron detection, especially when a large area and/or a wide angle is to be covered and could be a good alternative to liquid scintillators.