Plastic scintillator with phosphorescent dopants for α-particles registration

Adadurov, A.F.; Zhmurin, P.N.; Lebedev, V.N.; Kovalenko, E. N.

doi:10.1016/j.nima.2010.04.055

Cited by 16 publications

(5 citation statements)

References 2 publications

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“…Doping of guest elements into host matrices, such as the intentional introduction of acceptor or donor impurities into intrinsic semiconductors, and laser crystals containing rare-earth ions or transition metal ions as an active gain medium, , has been a widely used and powerful strategy to alter and modulate the properties and performances of materials. In the field of organic scintillators, doping with various phosphor elements into plastic matrix provides low-cost and large-volume ionizing radiation detectors with the scope of detection of various radiation particles, particularly for high-energy neutrons. − In this context, the plastic host acts mainly as a diluting matrix to support the active elements and to suppress the concentration-induced exciton self-quenching. On the other hand, for many advanced application scenarios that require precise resolutions, ordered matrices become necessary compared to the amorphous ones.…”

Section: Introductionmentioning

confidence: 99%

Growth Regulation of Pentacene-Doped p-Terphenyl Crystals on Their Physical Properties for Promising Maser Gain Medium

Cui

Liu

Li³

et al. 2020

Crystal Growth & Design

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Doped organic crystals possess wide application potential in the fields of scintillators and maser gain medium. However, the growth of doped organic single crystals with bulk size and high quality is still a big challenge due to the well-known poor crystallization capacity for organic materials. Here we report a thermal field-elevating technique to realize optimized growth conditions for organic crystals, where a pentacene-doped p-terphenyl single crystal with a size of Φ18 mm × 80 mm is obtained. Crystal quality and doping concentration effect on the optical properties of the crystalline wafers are investigated. The results show that p-terphenyl single crystal as an ordered matrix not only separates the guest molecules from one another to prevent quenching, but also constructs a Shpolskii-type host as an orienting medium to increase the interaction of pentacene with light. Moreover, a slightly reducing growth atmosphere is found to generate longer excitation lifetimes and a larger magnetic susceptibility of the grown doped crystal, which may be favorable for the spin-related physical process occurring in the excited state.

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Section: Introductionmentioning

confidence: 99%

Growth Regulation of Pentacene-Doped p-Terphenyl Crystals on Their Physical Properties for Promising Maser Gain Medium

Cui

Liu

Li³

et al. 2020

Crystal Growth & Design

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“…Further improvement of the light output is concerned with increasing light emission efficiency of the scintillator using special phosphorescent dopants [19,20].…”

Section: Development Feasibilitymentioning

confidence: 99%

Feasibility of a large area detector for fast neutron imaging

Bogolubov¹,

Koshelev²,

Mikerov³

et al. 2012

J. Inst.

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Proton beam characterisation of a prototype thin-tile plastic scintillator detector with SiPM readout for use in fastneutron tracker R Preston, J Jakubek, D Prokopovich et al. ABSTRACT: The paper analyses the factors affecting the detection efficiency and the spatial resolution of the luminescent detectors intended for fast neutron imaging. An analytical approach has been used for this purpose. A design of the large area detector based on the application of a matrix screen and a set of crossed wavelength shifting fibers (WLS) for reading out the scintillation signal has been suggested. The spatial resolution of the detector depends on the cross section of the matrix cell. The detection efficiency of the detector is sufficiently high and can amount to about 25% for the screen made of polyvinyl toluene in the case of 14 MeV neutrons.

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“…An appropriate selection of the organometallic is needed since some iridium complexes may display undesirable thermoluminescence [18]. In addition to iridium complexes, plastic scintillator films with tris(dibenzoylmethane)mono(1,10phenanthroline)europium(Ⅲ) (Eu[DBM]3phen) complex as phosphorescent dopants demonstrate a moderate scintillation yield of 5,650 photons/MeV, but with a penalizing undesired long scintillation decay of 469 μs [19] [20]. Thus, an incorporation of organometallic phosphorescent complexes into organic polymer matrix was regarded as an alternative approach to enhance light yield of plastic scintillators.…”

Section: Introductionmentioning

confidence: 99%

Preparation and performance of plastic scintillators with copper iodide complex-loaded for radiation detection

Nikl

et al. 2022

Polymer

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Plastic scintillator with phosphorescent dopants for α-particles registration

Cited by 16 publications

References 2 publications

Growth Regulation of Pentacene-Doped p-Terphenyl Crystals on Their Physical Properties for Promising Maser Gain Medium

Growth Regulation of Pentacene-Doped p-Terphenyl Crystals on Their Physical Properties for Promising Maser Gain Medium

Feasibility of a large area detector for fast neutron imaging

Preparation and performance of plastic scintillators with copper iodide complex-loaded for radiation detection

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