Systematic study of particle quenching in organic scintillators

Santiago, L.M.; Bagán, H.; Tarancón, A.; Rauret, G.; Garcı́a, J.F.

doi:10.1016/j.nima.2012.09.041

Cited by 24 publications

(10 citation statements)

References 24 publications

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“…Phase boundary estimates derived from the emission wavelength and emission intensity curves were in good accord at ω 0,T = 0.40 (8) and ω 0,T = 0.44(9), respectively. Analogous wavelength and intensity data for the TW-h series found the phase boundary at ω 0,T = 0.50 (16) and ω 0,T = 0.55 (27), respectively.…”

Section: Methodsmentioning

confidence: 62%

“…1−7 A precise knowledge of the counting efficiency is essential to fundamental measurements of radioactivity, so any loss of energy by a decay product (e.g., a β-particle or Auger electron) that does not produce scintillation light introduces a potential problem in radionuclide metrology. While we recently demonstrated that the micelle size effect is extremely small, 7 it is clear that other micelle effects, including changes in transmission of scintillation photons, 8 will still be important in LSC experiments. The most drastic changes of this type might occur when crossing a boundary such as a critical micelle concentration (cmc) separating two optically distinct phases.…”

Section: Introductionmentioning

confidence: 98%

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Identification of Phase Boundaries in Surfactant Solutions via Compton Spectrum Quenching

Bergeron

2014

J. Phys. Chem. A

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The critical micelle concentration and the phase boundary between isolated surfactant molecules and aggregates are probed via fluorescence spectroscopy and a Compton spectrum quenching technique for aqueous and toluenic solutions of Triton X-100 (TX-100). The internal fluorophore of TX-100 provides a convenient probe for the fluorescence measurements, and the appearance of redder bands in the fluorescence spectra and their relationship with aggregation (clustering of TX-100) phenomena is addressed. The Compton spectrum quenching approach makes use of quench indicating parameters (QIPs) commonly measured in liquid scintillation counting experiments. Phase boundaries identified by the QIP-based approach are in excellent accord with the fluorescence-based approach.

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Section: Methodsmentioning

confidence: 62%

Section: Introductionmentioning

confidence: 98%

Identification of Phase Boundaries in Surfactant Solutions via Compton Spectrum Quenching

Bergeron

2014

J. Phys. Chem. A

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“…For the radioactivity measurements, Pico Prias polyethylene vials of 6 mL (Perkin Elmer, USA) were used to prepare the samples using the following active stock solutions: a low-energy beta emitter, 3 …”

Section: Methodsmentioning

confidence: 99%

“…The counting time in the Quantulus for the blank, 3 H, 14 C and 241 Am samples was 60 min and 90 min for the 90 Sr/ 90 Y samples. The measurement of the external standard quenching parameter SQP(E) was fixed at 10 min.…”

Section: Measurementsmentioning

confidence: 99%

“…When measuring with plastic scintillators, the energy of the radioactive particle or radiation is transferred to the polymeric matrix whereas the fluorescent solutes (primary and secondary) are responsible to convert this energy deposited into photons that are detected by means of photomultiplier tubes [1,2]. Plastic scintillators produced in form of microspheres with a diameter ranging from ten to hundreds micrometers, named Plastic Scintillation microspheres (PSm) [3], can be applied in the field of the radioactivity measurements and more specifically in the routine determination of beta and alpha emitting radionuclides in preparation from polymers using organic solvent extraction/evaporation [10]; microfluidic devices [11], electro-spray technique [12] and supercritical fluids [13]. Organic solvent evaporation/extraction methodology has been adapted successfully for the synthesis of polystyrene based PSm using dichloromethane (DCM) as the organic solvent of the polymer and the fluorescent solutes, obtaining spherical microparticles with a diameter around 70 m and a yield of 100% [2].…”

Section: Introductionmentioning

confidence: 99%

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Polystyrene based sub-micron scintillating particles produced by supercritical anti-solvent precipitation

Santiago

Masmoudi

Tarancón

et al. 2015

The Journal of Supercritical Fluids

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Quantifying the impact of lead doping on plastic scintillator response to radiation

et al. 2019

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Purpose Through the addition of high‐Z dopants, the sensitivity of plastic scintillators to low‐energy radiation can be increased. This study quantifies this change in sensitivity as a function of dopant concentration. Methods Measurements were conducted using four different lead‐doped scintillators (0%, 1%, 1.5%, and 5% Pb) in high‐energy electrons (6 to 15 MeV) and low‐energy photon (100 to 300 kVp) radiation fields. High‐energy and low‐energy irradiations were done using a clinical linear accelerator and an orthovoltage unit, respectively. Light emitted by the scintillator was quantified using a photosensor module. The experimental setup was replicated in Geant4.10.3 Monte Carlo and scintillator parameters (Quenching parameter: kB and the light yield: L0) were varied until agreement between measured and simulated results was reached. Monoenergetic electrons were used to simulate the high‐energy electron beam while a spectrum generated using SpekCalc® software was used in the low‐energy simulations. Light produced by the scintillator was quantified using a flux scorer sensitive only to photons in the visible wavelength range. In order to compare measured and simulated results, the light produced by the scintillator was normalized to the absorbed dose‐to‐water at the point of measurement. Results At high lead dopant concentrations, the scintillator's sensitivity to the 100 kVp beam increased by 474% relative to the 15 MeV electron beam; the scintillator's kB parameter increased from 0.126 to 0.27 mm/MeV. A model quantifying the change in kB and L0 as a function of Zeff was derived; presenting a modified Birks' Law for metal‐doped plastic scintillators. Conclusion The impact of high‐Z doping on plastic scintillator response was quantified; this can allow for the controlled induction of energy dependence in plastic scintillator detectors.

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Systematic study of particle quenching in organic scintillators

Cited by 24 publications

References 24 publications

Identification of Phase Boundaries in Surfactant Solutions via Compton Spectrum Quenching

Identification of Phase Boundaries in Surfactant Solutions via Compton Spectrum Quenching

Polystyrene based sub-micron scintillating particles produced by supercritical anti-solvent precipitation

Quantifying the impact of lead doping on plastic scintillator response to radiation

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