Pulse shape discrimination between (fast or thermal) neutrons and gamma rays with plastic scintillators: State of the art

Bertrand, Guillaume; Hamel, Matthieu; Normand, S.; Sguerra, Fabien

doi:10.1016/j.nima.2014.12.024

Cited by 100 publications

(72 citation statements)

References 66 publications

(36 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To overcome this issue, a previous example was found in the literature, where PMMA‐based plastic scintillators (also with an aliphatic matrix) were reported to be efficient when the first fluorophore was added at very high concentration, hence being considered as a “secondary solvent.” This is why we decided to load the PLA with large amounts of PPO, herein 10 wt %. The same strategy is typically applied for fast neutron/gamma discrimination . Thus, PPO and bis‐MSB were added to previously purified PLA (see topological representation of these molecules in the Scheme ), and the mixture was carefully melted until obtaining a homogenous solution.…”

Section: Resultssupporting

confidence: 76%

Attempting to prepare a plastic scintillator from a biobased polymer

Lebouteiller¹

2019

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

A new plastic scintillator was prepared from a renewable polymer source. It is composed of the mighty 2,5‐diphenyloxazole and 1, 4‐bis(2‐methylstyryl)benzene molecules (PPO and bis‐MSB), acting as primary and secondary fluorophores, respectively, together dissolved in a polylactic acid matrix—PLA. This polymer is indeed considered as the biomass‐based equivalent of petroleum‐derived plastics in terms of mechanical and optical properties. Subsequent to the bis‐MSB emission, the emission wavelength is centered around 424 nm and the fluorescence decay time is in the nanosecond range. The material was fully characterized, and its scintillation performances were compared to a commercial PVT‐based plastic scintillator: EJ‐200. Like polystyrene‐ or polyvinyltoluene‐based scintillators, the material displayed a good response linearity with the energy of the incident gamma‐ray. However, the observed scintillation yield was rather modest, with a reported 500 ph/MeV value when excited with a gamma‐ray‐emitting 60Co source. This preliminary test could pave the way to new and renewable polymers for unexpected applications such as nuclear physics. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48724.

show abstract

Section: Resultssupporting

confidence: 76%

Attempting to prepare a plastic scintillator from a biobased polymer

Lebouteiller¹

2019

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

show abstract

“…To achieve this goal a large scale deployment of detectors is necessary to monitor the flow of people and goods. 4 A major field of research is the incorporation of various elements in PSs, as it is an elegant and versatile solution to PS drawbacks. 2 But, as nothing is perfect, PS technology presents some drawbacks such as poor sensitivity towards gamma and neutron radiation and poor energy resolution.…”

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

Self Cite

View full text Add to dashboard Cite

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.

show abstract

“…Fori nstance, the last years have seen severald e-velopmentsw hereby liquid scintillators have been replaced by plasticsi nt he field of neutron/gammad iscrimination. [9] Ta ble 1 containsreference data from the literature (usually the Material Safety Data Sheet), except for the value for EHCz, which was experimentally determined. It can be seen that only four of the seven commons olvents have af lash point in the range 100-150 8C, and that xylene(s) and pseudocumene have very low flash points (25 and 48 8C, respectively).…”

Section: State Of the Artmentioning

confidence: 99%

N‐(2‐Ethylhexyl)carbazole: A New Fluorophore Highly Suitable as a Monomolecular Liquid Scintillator

Montbarbon

Sguerra

Bertrand

et al. 2016

Chemistry A European J

Self Cite

View full text Add to dashboard Cite

The synthesis, photophysical properties, and applications in scintillation counting of N-(2-ethylhexyl)carbazole (EHCz) are reported. This molecule displays all of the required characteristics for an efficient liquid scintillator (emission wavelength, scintillation yield), and can be used without any extra fluorophores. Thus, its scintillation properties are discussed, as well as its fast neutron/gamma discrimination. For the latter application, the material is compared with the traditional liquid scintillator BC-501 A, and other liquid fluorescent molecules classically used as scintillation solvents, such as xylene, pseudocumene (PC), linear alkylbenzenes (LAB), diisopropylnaphthalene (DIN), 1-methylnaphthalene (1-MeNapht), and 4-isopropylbiphenyl (iPrBiph). For the first time, an excimeric form of a molecule has been advantageously used in scintillation counting. A moderate discrimination between fast neutrons and gamma rays was observed in bulk EHCz, with an apparent neutron/gamma discrimination potential half of that of BC-501 A.

show abstract

Pulse shape discrimination between (fast or thermal) neutrons and gamma rays with plastic scintillators: State of the art

Cited by 100 publications

References 66 publications

Attempting to prepare a plastic scintillator from a biobased polymer

Attempting to prepare a plastic scintillator from a biobased polymer

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

N‐(2‐Ethylhexyl)carbazole: A New Fluorophore Highly Suitable as a Monomolecular Liquid Scintillator

Contact Info

Product

Resources

About