نتایج جستجو برای: neutron detector
تعداد نتایج: 103020 فیلتر نتایج به سال:
Compact neutron detectors are being designed and tested for use as low-power real-time personnel dosimeters. The neutron detectors are pin diodes that are mass produced from high-purity Si wafers. Each detector has thousands of circular perforations etched vertically into the device. The perforations are backfilled with 6 LiF to make the pin diodes sensitive to thermal neutrons. The prototype d...
Multielements in a typical Japanese diet certified reference material prepared at the National Institute for Environmental Studies (NIES) of Japan, in collaboration with the National Institute of Radiological Sciences (NIRS) of Japan were determined by instrumental neutron activation analysis (INAA). Five samples (ca. 510-1000 mg) and comparative standards were irradiated for a short time (10 s...
The BD-100 is a neutron bubble detector which is available commercially from Chalk River Nuclear Laboratories, Canada. The detector consists of tiny superheated liquid droplets that are dispersed throughout a firm elastic polymer. The polymer is contained in a small capped and sealed glass (glass detector) or plastic (plastic detector) test tube. A low boiling point liquid floating above the po...
The properties as a neutron detector of a silicon photodiode of type Hamamatsu S3590-02 in conjunction with a multi-channel analyser Alphatron-3C were investigated in an Am-Be calibration field at the department of nuclear engineering at the University of Madrid. Since the photodiode is sensitive to charged particles, we covered it with two types of converters to enable its response to thermal ...
Presented here are results of simulations of neutron background performed for a time projection chamber acting as a particle dark matter detector in an underground laboratory. The investigated background includes neutrons from rock and detector components, generated via spontaneous fission and (α,n) reactions, as well as those due to cosmic-ray muons. Neutrons were propagated to the sensitive v...
A neutron diagnostic for inertial confinement fusion (ICF) experiments was designed and fabricated that is suitable for both the OMEGA and National Ignition Facility (NIF) laser systems. The diagnostic measures the spectrum of fusion neutrons that are generated at peak compression. The neutrons are downshifted, or lose energy, as they escape depending on the areal density (ρr) of the imploded t...
An epithermal neutron camera based on energy-filtered imaging with gas electron multipliers was developed. Epithermal neutron imaging is achievable without time-of-flight detection of neutrons by using a resonance filter and a thermal neutron absorber. This technique is applicable to compact accelerator-based neutron sources. Blurring of epithermal neutron images caused by neutron scattering in...
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