The feasibility of using plastic scintillation fibers for fast neutron spectrometry

Design of a neutron-TPC prototype and its performance evaluation based on an alpha-particle test

“…4. An Am-241 alpha source with a radioactivity of ∼10 4 Bq was placed on top of a collimator made of two stainless steel plates with several circular holes. The holes in the bottom plate were arranged in a line, each hole with a diameter of 0.5 mm.…”

“…Based on the proton-recoil method, several kinds of fast neutron spectrometers have been developed, including proton recoil scintillators, gas proportional counters and proton recoil telescopes [3]. The proton recoil scintillators and gas proportional counters are faced with the complexity of spectrum de-convolution, making it difficult for them to achieve high energy resolutions (commonly FWHM>5%) [3][4][5]. Through the selection of proton recoil angles in the measurement, proton recoil tele-scopes can achieve a relatively high resolution (FWHM< 5%), but have to pay the price of low detection efficiency (∼10 −5 or even less) [1,2,6].…”

Numerical simulation of simple position-sensitive γ-ray detector based on plastic scintillating fiber array (OFT-06-102R1)

“…Thus, utilizing the geometric channeling of fibers in guiding the photons' propagation, fibers can provide better spatial resolution in detecting γ -rays comparing the bulk crystals. Among various scintillation fibers, plastic scintillation fibers (PSFs) have been used extensively in the detection of high energy particles [9,10]. The physical characteristics of many different PSFs are well-documented [9,10].…”

“…Among various scintillation fibers, plastic scintillation fibers (PSFs) have been used extensively in the detection of high energy particles [9,10]. The physical characteristics of many different PSFs are well-documented [9,10]. PSFs of various sizes are commercially available; the costs are significantly less than that of bulk scintillation crystals, making the construction of detectors for practical γ -ray imaging feasible [11][12][13][14][15].…”

14-MeV neutron directional fiber detector modeling using GEANT

“…Accordingly a 10% energy resolution at 14 MeV proton energy was used in the present simulation to account the above mentioned factors. Singkarat et al [12], using similar formulation as in [11], estimated the resolution to be 8.7±0.1% for BCF-20 fibers, which has more or less similar material characteristics specification as the BCF-12 fibers used in the present study. However, Singkarat et al, pointed out that even a better resolution can be achieved by having extra mural absorber (EMA) coated fibers.…”