نتایج جستجو برای: neutron irradiation
تعداد نتایج: 108726 فیلتر نتایج به سال:
All the CMS muon stations will be equipped with Resistive Plate Chambers (RPCs). They will be exposed to high neutron background environment during the LHC running. In order to verify the safe operation of these detectors, an irradiation test has been carried out with two RPCs at high neutron flux (about 10 n cm 2 s ), integrating values of dose and fluence equivalent to 10 LHC-years. Before an...
The assumption that the shape of the epithermal neutron spectrum can be described, in any research reactor, by the 1/E1+α function is a fundamental starting point of the k0 standardization. This assumption may be questioned from a reactor physics viewpoint. The type of moderator, the existence of neutron reflectors, the additional production of (γ, n) neutrons and resonance capture by construct...
Ionizing radiation is applied as the standard treatment for glioblastoma multiforme (GBM). However, radiotherapy remains merely palliative, not curative, because of the existence of glioma stem cells (GSCs), which are regarded as highly radioresistant to low linear-energy-transfer (LET) photons. Here we analyzed whether or not high-LET particles can overcome the radioresistance of GSCs. Glioma ...
57 IMR KINKEN Research Highlights 2013 IMR KINKEN Research Highlights 2013 Neutron irradiation using material-testing reactors is common in research on the effects of irradiation on materials. For a more precise understanding of irradiation dose dependency, the maintenance of identical irradiation conditions, i.e., irradiation rate (neutron flux), neutron spectrum, and irradiation temperature, ...
Recently, several electronic personal dosemeters (EPDs) capable of measuring neutron dose equivalents were developed and have appeared on the market. The authors initiated the present study to assess performance of neutron EPDs. The EPD selected for this study was NRY21, manufactured by Fuji Electric Systems Co., Ltd. This dosemeter uses two silicon semiconductor detectors (a fast neutron senso...
Spectrum averaged cross sections for the Zn(n, p)Cu, Zn(n, p)Cu and Y(n, p)Sr reactions were measured using a 14 MeV d(Be) neutron source. In each case a clean radiochemical separation was performed and the radioactivity of the product was determined via highresolution γ -ray spectrometry or anticoincidence β− counting. The cross sections are three to five times higher than with a fission neutr...
We report the influence of atomic disorder introduced by sequential neutron irradiation on the basic superconducting properties, flux pinning and grain connectivity. Two different polycrystalline Sm-1111 samples (SmFeAsO1−xFx ) and two Ba-122 single crystals (BaFe1.8Co0.2As2) were investigated. The monotonic decrease of the transition temperature with neutron fluence degrades the upper critical...
The neutron energy spectra have been calculated in the fuel region, inner and outer irradiation sites of the zero power research reactor using the MCNP-4C code and the combination of the WIMS-D/4 transport code for generation of group constants and the three-dimensional CITATION diffusion code for core analysis calculations. The neutron energy spectrum has been divided into three regions and co...
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