Deterioration of Anthracene under  -Particle Irradiation

Birks, J. B.; Black, Fiona A.

doi:10.1088/0370-1298/64/5/112

Cited by 80 publications

(33 citation statements)

References 2 publications

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“…A quenching factor matrix exists between the recoil energy and the visible energy "seen" by the PMTs. The light output in the liquid scintillator can be described by Birks' relation [38,43]:…”

Section: Light Output Response To Fast Neutronsmentioning

confidence: 99%

Measuring muon-induced neutrons with liquid scintillation detector at Soudan mine

Zhang

Mei

2014

Phys. Rev. D

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We report a direct detection of muon-induced high energy neutrons with a 12-liter neutron detector fabricated with EJ-301 liquid scintillator operating at Soudan Mine for about two years. The detector response to energy from a few MeV up to ∼ 20 MeV has been calibrated using radioactive sources and cosmic-ray muons. Subsequently, we have calculated the scintillation efficiency for nuclear recoils, up to a few hundred MeV, using Birks' law in the Monte Carlo simulation. Data from an exposure of 655.1 days were analyzed and neutron-induced recoil events were observed in the energy region from 4 MeV to 50 MeV, corresponding to fast neutrons with kinetic energy up to a few hundred MeV, depending on the scattering angle. Combining with the Monte Carlo simulation, the measured muon-induced fast neutron flux is determined to be (2.23 ± 0.52(sta.) ± 0.99(sys.)) × 10 −9 cm −2 s −1 (En > 20 MeV), in a reasonable agreement with the model prediction. The muon flux is found to be (1.65 ± 0.02(sta.) ± 0.1(sys.)) × 10 −7 cm −2 s −1 (Eµ > 1 GeV), consistent with other measurements. As a result, the muon-induced high energy gamma-ray flux is simulated to be 7.08 ×10 −7 cm −2 s −1 (Eγ > 1 MeV) for the depth of Soudan.

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Section: Light Output Response To Fast Neutronsmentioning

confidence: 99%

Measuring muon-induced neutrons with liquid scintillation detector at Soudan mine

Zhang

Mei

2014

Phys. Rev. D

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“…In PVT, it is known that ion irradiation drastically changes the chemical structure, leading to hydrogen and hydrocarbon groups 9 desorption before transformation to hydrogenated amorphous carbon at the highest doses, while luminescence is quenched [17]. The previous investigations on IBIL of BC-400 [10][11][12][13], non time-resolved and mostly using light ions, evidenced that theses modifications are associated to a degradation of scintillation intensity.…”

Section: Methodsmentioning

confidence: 99%

“…Their main drawback is however the degradation of their luminescence properties under irradiation. It has long been known that the energy deposition in organic scintillators not only excites the fluorophores but also breaks chemical bonds, leading to luminescence quenching [9]. Accordingly, the previous IBIL studies of BC-400 revealed a degradation of scintillation as a function of irradiation dose [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

SPORT: A new sub-nanosecond time-resolved instrument to study swift heavy ion-beam induced luminescence – Application to luminescence degradation of a fast plastic scintillator

Gardès¹,

Balanzat²,

Ban-d’Etat³

et al. 2013

Nuclear Instruments and Methods in Physics Research Section B:

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We developed a new sub-nanosecond time-resolved instrument to study the dynamics of UVvisible luminescence under high stopping power heavy ion irradiation. We applied our instrument, called SPORT, on a fast plastic scintillator (BC-400) irradiated with 27-MeV Ar ions having high mean electronic stopping power of 2.6 MeV/µm. As a consequence of increasing permanent radiation damages with increasing ion fluence, our investigations reveal a degradation of scintillation intensity together with, thanks to the time-resolved measurement, a decrease in the decay constant of the scintillator. This combination indicates that luminescence degradation processes by both dynamic and static quenching, the latter mechanism being predominant. Under such high density excitation, the scintillation deterioration of BC-400 is significantly enhanced compared to that observed in previous investigations, mainly performed using light ions. The observed non-linear behaviour implies that the dose at which luminescence starts deteriorating is not independent on particles' stopping power, thus illustrating that the radiation hardness of plastic scintillators can be strongly weakened under high excitation density in heavy ion environments.

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“…There are three different configurations of self-interstitial considered in this paper, namely Hexagonal, Tetrahedral and Split-h1 1 0i. The diffusion path considered here is from hexagonal site to neighbor hexagonal site since it is energetically favored [26].…”

Section: Calculation and Comparison Of Physical Propertiesmentioning

confidence: 99%

Comparative investigation of a newly optimized modified embedded atom method potential with other potentials for silicon

Liu

Zhang

Tao

et al. 2015

Computational Materials Science

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Deterioration of Anthracene under -Particle Irradiation

Cited by 80 publications

References 2 publications

Measuring muon-induced neutrons with liquid scintillation detector at Soudan mine

Measuring muon-induced neutrons with liquid scintillation detector at Soudan mine

SPORT: A new sub-nanosecond time-resolved instrument to study swift heavy ion-beam induced luminescence – Application to luminescence degradation of a fast plastic scintillator

Comparative investigation of a newly optimized modified embedded atom method potential with other potentials for silicon

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