New heavy plastic scintillators

Britvich, G. I.; Vasil’chenko, V.G.; Lapshin, V.G.; Соловьев, А. С.

doi:10.1007/bf02758995

Cited by 15 publications

(23 citation statements)

References 4 publications

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“…The extent of the irreversible damage to the polymer base depends on the chemical structure of an LD and its concentration in a PS [59]. Most LDs exhibit radiation protection properties.…”

Section: The Thermal Stability and Radiation Resistance Of Scintillatmentioning

confidence: 99%

“…PPP, which is distinguished by an extremely high resistance to radiation (it is damaged only at doses above 100 Mrad [59]) exhibits radiation protection effect upon PMMA aging during the exposure to UV radiation of electrons [67]. Under illumination with UV light (λ = 253.7 nm), 0.032 breaks per energy quantum occur during PMMA destruction.…”

Section: The Thermal Stability and Radiation Resistance Of Scintillatmentioning

confidence: 99%

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Plastic Scintillators Based on Polymethyl Methacrylate: A Review

Salimgareeva

Колесов

2005

Instrum Exp Tech

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The scintillation properties of plastic scintillators based on polymethyl methacrylate with various luminescent dyes are considered. It is shown that replacing the naphthalene conventionally used in these scintillators as a secondary solvent with octadeuteronaphthalene and 1,3-divinylbenzene will not alter either their scintillation efficiency and optical transparency, or their thermal, light, and radiation-damage stability; replacing it with 1,1,3-trimethyl-3-phenylindan, however, improves all these characteristics. It is demonstrated that n-terphenyl, 2,5-diphenyloxazole, 2-biphenyl-5-phenyl-1,3-oxazole, 2-biphenyl-5-( α -naphthyl)-1,3-oxazole, 2-phenyl-5-(4-biphenylyl)-1,3,4-oxadiazole, and 2-(4'-tret -butylphenyl)-5-(4''-biphenylyl)-1,3,4-oxadiazole can be used as luminescent activators, and n-bis-( o -methylstyryl)-benzene and 1,4-di-(5-phenyl-2-oxazolyl)-benzene are applicable as wavelength shifters.

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“…The extent of the irreversible damage to the polymer base depends on the chemical structure of an LD and its concentration in a PS [59]. Most LDs exhibit radiation protection properties.…”

Section: The Thermal Stability and Radiation Resistance Of Scintillatmentioning

confidence: 99%

Section: The Thermal Stability and Radiation Resistance Of Scintillatmentioning

confidence: 99%

Plastic Scintillators Based on Polymethyl Methacrylate: A Review

Salimgareeva

Колесов

2005

Instrum Exp Tech

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“…In the literature, the following metals were tested, with more or less popularity, at least in plastic solutions. Thus, Iodine [7] (Z = 53), Holmium [8] (Z = 67), Tantalum [8] (Z = 73), and Mercury [9] (Z = 80) were less studied. An extensive methodological work was performed by Sandler and Tsou concerning the metals from the groups IVA and VA [10].…”

Section: Organometallic Complexmentioning

confidence: 99%

Pseudo-gamma Spectrometry in Plastic Scintillators

Carrel¹

2017

New Insights on Gamma Rays

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War against CBRN-E threats needs to continuously develop systems with improved detection eiciency and performances. This topic especially concerns the NR controls for homeland security. This chapter introduces how it is now possible to perform gamma identiication using plastic scintillators, which are not conventionally designed for this purpose. Two distinct approaches are discussed: the irst one is the chemical modiications of the scintillator itself and the second is introducing new algorithms, Speciically designed for this application.

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“…The scintillation characteristics of polystyrene scintillators (PSs) based on 3HF and 4 1 -vinyl-3hydroxyflavone were studied in [4,5]. It was established, in particular, that the radiation resistance (RR) of 3HF-based PSs is as high as ~2 Mrad and exceeds the RR of the well-known ternary PS by a factor of ~5 [6].Continuing with the synthesis and investigation of new scintillation systems, we synthesized and explored for the first time boron-containing PSs based on 3HF, with the aim of using them in thermal neutron detectors.Note that a boron-containing PS (isopropenyl carborane), doped with phosphor dyes of 4% para -terphenyl (PTP) and 0.04% 1,4-bis-(5-phenyloxazolyl-2-yl)-benzene (POPOP) and having a peak emission wavelength of 420-425 nm, was synthesized and investigated in [7]. In addition, a boron-containing PS is also produced by Bicron (United States) [8].…”

mentioning

confidence: 99%

mentioning

confidence: 99%

New boron-containing polystyrene scintillators based on 3-hydroxiflavone

Akopyan

Gavalyan

2005

Instrum Exp Tech

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3-Hydroxiflavone (3HF), a phosphor with a large Stokes shift, was investigated in [1][2][3], along with both monomers containing 3HF groups and polymers based on them. The scintillation characteristics of polystyrene scintillators (PSs) based on 3HF and 4 1 -vinyl-3hydroxyflavone were studied in [4,5]. It was established, in particular, that the radiation resistance (RR) of 3HF-based PSs is as high as ~2 Mrad and exceeds the RR of the well-known ternary PS by a factor of ~5 [6].Continuing with the synthesis and investigation of new scintillation systems, we synthesized and explored for the first time boron-containing PSs based on 3HF, with the aim of using them in thermal neutron detectors.Note that a boron-containing PS (isopropenyl carborane), doped with phosphor dyes of 4% para -terphenyl (PTP) and 0.04% 1,4-bis-(5-phenyloxazolyl-2-yl)-benzene (POPOP) and having a peak emission wavelength of 420-425 nm, was synthesized and investigated in [7]. In addition, a boron-containing PS is also produced by Bicron (United States) [8].Our PS samples were produced in glass ampoules (diameter, 16 mm) according to the method of thermal block polymerization of styrene (ST) in a flow of an inert gas (nitrogen), following the procedure in [9]. The ST was preliminarily distilled in vacuum. Prior to dissolving in the ST, the PTP, the POPOP, and 1,2-dicarbaclozododekaboran-12 ( ortho -carborane, o -CB) were all purified by recrystallization using standard techniques, and the 3HF was synthesized according to the procedure in [10].We obtained PSs of three different phosphor compositions: (1) ST + 2% PTP + 0.01% POPOP; (2) ST + 2% PTP + 1% 3HF; and (3) ST + 1% 3HF. By dissolving preliminarily calculated amounts of o -CB ( C 2 H 12 B 10 ) in each of these, we obtained four samples with boron concentrations of 1.84, 3.72, 5.11, and 10.22%, respectively. The concentrations of the 10 Ç isotope in the samples were 0.36, 0.73, 1.00, and 2.00%, respectively, since o -CB is 75.07% boron, and the natural boron content of 10 B is 19.57% [11]. After being removed from the ampoules, the PS samples of each composition were put into cylindrical forms 16 mm in diameter and 5 and 10 mm in height. The cylinders were then polished. For comparison, samples of the above three compositions containing no o -CB were manufactured under the same conditions, along with pure samples of a polystyrene light guide. The homogeneity of the o -CB distribution along the heights of the samples was assessed using the infrared spectroscopy method; we analyzed small samples taken from the top and bottom zones of the cylinders. The infrared spectra of 100-µ m-thick film samples prepared according to [4] were recorded using a Specord 75 IR instrument. The characteristic absorption band of B-H stretching vibrations corresponds to the range of 2610-2590 cm -1 [12].The efficiency of the systems synthesized was assessed by measuring the light yield in samples irradiated with thermal neutrons and α particles. We used a standard Po-Be neutron source with an intensity of ~5 × 10...

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New heavy plastic scintillators

Cited by 15 publications

References 4 publications

Plastic Scintillators Based on Polymethyl Methacrylate: A Review

Plastic Scintillators Based on Polymethyl Methacrylate: A Review

Pseudo-gamma Spectrometry in Plastic Scintillators

New boron-containing polystyrene scintillators based on 3-hydroxiflavone

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