Current Status on Plastic Scintillators Modifications

Bertrand, Guillaume; Hamel, Matthieu; Sguerra, Fabien

doi:10.1002/chem.201404093

Cited by 120 publications

(78 citation statements)

References 136 publications

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“…In this context, radiological and nuclear safety is a priority as it is mandatory to compartmentalize radioactive materials from the civil world. 1 For example, high concentrations of fluorophores successfully performed neutron/gamma discrimination which was considered unachievable years before. Plastic scintillators (PSs) are the cheapest, sturdiest and most accessible solution 1 as opposed to inorganic scintillators, NaI(Tl), CZT or HPGe technologies.…”

Section: Introductionmentioning

confidence: 99%

Understanding the behaviour of different metals in loaded scintillators: discrepancy between gadolinium and bismuth

Bertrand¹,

Dumazert²,

Sguerra³

et al. 2015

J. Mater. Chem. C

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Organometallic chemistry has recently gained a lot of attention in the domain of plastic scintillators.Homogenously dispersed metal complexes in a polymer matrix can afford plastic scintillators with unseen abilities. Heavy atom loading is very attractive as it gives access to plastics with increased sensitivity towards elusive radiations such as gamma and neutron. But this comes with a drawback, as heavy atoms tend to quench fluorescence, hence decreasing the scintillation yield. We present here a comprehensive study of this phenomenon with bismuth and gadolinium complexes. We investigate the influence of the ligand nature by varying organometallic and fluorophore concentration to probe their interaction. We also propose an explanation of the difference in behavior between these two metals. These results were applied to the fabrication of large volume loaded plastic scintillators (4100 cm 3 ). Bismuth loaded scintillators displayed characteristics equivalent to lead loaded commercial materials, and gadolinium samples proved to be able to capture thermal neutrons and release gamma rays. of our optimization, large scale loaded PSs (4100 cm 3 ) were synthesized and characterized.

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Section: Introductionmentioning

confidence: 99%

Understanding the behaviour of different metals in loaded scintillators: discrepancy between gadolinium and bismuth

Bertrand¹,

Dumazert²,

Sguerra³

et al. 2015

J. Mater. Chem. C

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“…Among other, it is noteworthy at this stage to introduce the scintillation light yield (or light output), which is the quantity of photons delivered by the material when excited by electrons with 1 MeV energy. When a special care is given to aford the plastic scintillator special applications-and this will be the topic of this chapter, it is possible to add various elements, for example, neutron absorbers or organometallics, the later allowing the Pseudogamma spectrometry in plastic scintillators [3]. However, we will see that such loading may afect the light yield, leading to a trade-of between high metal content and detector's performances.…”

Section: Plastic Scintillator Loadingmentioning

confidence: 99%

“…When combined to the shortage of eicient detectors (e.g., 3 He for thermal neutron detection) and a global, worldwide crisis, there is a real need of cheap, yet eicient detectors.…”

Section: Introductionmentioning

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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“…Modern refining techniques have made it possible for undoped aromatic ring polymers to be used as scintillation materials [7,8]. Examples include polycarbonates and poly (ethylene terephthalate) [2,[9][10][11][12][13][14][15][16][17][18][19][20][21]. Moreover, optical characteristics of high-purity polystyrene and poly (vinyltoluene) have been subsequently re-examined [22,23].…”

Section: Introductionmentioning

confidence: 97%