Stilbene composite scintillators as detectors of fast neutrons emitted by a 252Cf source

Tarasenko, О.А.; Galunov, N.Z.; Karavaeva, N.L.; Lazarev, Igor; Panikarskaya, V. D.

doi:10.1016/j.radmeas.2013.08.005

Cited by 13 publications

(3 citation statements)

References 10 publications

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“…We also investigated composite scintillators of size 30×30×20 mm 3 . We used the optimal fraction of grain sizes (from 1.7 to 2.2 mm) to obtain heterogeneous organic scintillators with high light output (for more information, see [9]) Fig. 1 shows a block diagram of a simple installation for measuring the kinetics of radioluminescence by a singlephoton method.…”

Section: Methodsmentioning

confidence: 99%

“…dE / dx of the ionizing particle. Comparing (8) and 9, we can conclude that the factor N 0 , which is not taken into account in (9), is proportional to the number of initial T-states (for small β T will determine the intensity of the slow component. It also depends on the values of dE / dx.…”

Section: Theorymentioning

confidence: 99%

“…According to (9), the shape and intensity of the slow component of the scintillation pulse should depend significantly on the specific energy losses of the dE/dx ionizing particle. Indeed, the quantities l, D T , and r 0 determine the shape of the slow component according to (9). The T-state diffusion coefficient of D T and the dimension of this diffusion l depend on the characteristics of the object.…”

Section: Theorymentioning

confidence: 99%

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Separate detection of ionizing radiation with different specific energy losses by organic heterostructured scintillators

2019

The Journal of v. N. Karazin Kharkiv National University, Series "Physics"

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Molecular organic scintillation materials are the most effective objects for creating systems that detect the kinds of radiation, that the most harmful to humans (alpha particles, fast neutrons, etc.). In addition, organic crystals and liquids are capable to separate these types of radiation from photons of background gamma radiation. In these scintillators, ionizing radiation generates two types of luminescent response– prompt and delayed radioluminescence Ionizing radiation with a high specific energy loss dE/dx, i.e. energy loss E per unit path length x, generate a scintillation pulse in these media with a high proportion of the slow component. Recently, new types of scintillators have been developed, namely, heterogeneous organic scintillators containing single-crystal scintillation grains that can be combined by hot pressing sintering (polycrystals or Van der Waals ceramics) or can be incorporated into a transparent gel composition (composite scintillators). the ability of heterogeneous organic scintillators to separate signals from radiation with different dE/dx and the physical basis of this process in heterogeneous scintillation materials remain one of the urgent, unexplored problems. This work presents the results of the study of the form of scintillation pulse shapes for the samples of organic single crystals, polycrystals and compositional scintillators based on stilbene in comparison with the same results obtained for p-terphenyl and anthracene for various types of ionizing radiation excitations. The peculiarities of the influence of the triplet-triplet annihilation process on the formation of a slow component of the radioluminescence pulse in these systems have being studied. We found that the ability of new types of organic heterogeneous materials (polycrystals and composite scintillators) to the separate registration of ionizing radiation in the shape of the scintillation pulse is close to the corresponding values that characterize this ability of structurally perfect single crystals.

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Section: Methodsmentioning

confidence: 99%

Section: Theorymentioning

confidence: 99%

Section: Theorymentioning

confidence: 99%

See 1 more Smart Citation

Separate detection of ionizing radiation with different specific energy losses by organic heterostructured scintillators

2019

The Journal of v. N. Karazin Kharkiv National University, Series "Physics"

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Current Status on Plastic Scintillators Modifications

Bertrand

Hamel

Sguerra

2014

Chemistry A European J

118

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Recent developments of plastic scintillators are reviewed, from 2000 to March 2014, distributed in two different chapters. First chapter deals with the chemical modifications of the polymer backbone, whereas modifications of the fluorescent probe are presented in the second chapter. All examples are provided with the scope of detection of various radiation particles. The main characteristics of these newly created scintillators and their detection properties are given.

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