نتایج جستجو برای: neutron yield
تعداد نتایج: 239350 فیلتر نتایج به سال:
Taleyarkhan et al. (1) claimed evidence for D-D (deuterium-deuterium) fusion in cavitation experiments with deuterated acetone. A number of inconsistencies in that study, however—involving data on neutron yield, the reported response of the detector used, and coincidences between sonoluminescence (SL) and scintillator pulses—cast doubt on that claim. As pointed out by Taleyarkhan et al. (1), if...
Taleyarkhan et al. (1) claimed evidence for D-D (deuterium-deuterium) fusion in cavitation experiments with deuterated acetone. A number of inconsistencies in that study, however—involving data on neutron yield, the reported response of the detector used, and coincidences between sonoluminescence (SL) and scintillator pulses—cast doubt on that claim. As pointed out by Taleyarkhan et al. (1), if...
background: several landmine detection methods, based on nuclear techniques, have been suggested up to now. neutron-induced gamma emission, neutron and gamma attenuation, and fast neutron backscattering are the nuclear methods used for landmine detection. in this paper an optimized (safe and effective) moderating structure using an 241am-be neutron source for detecting landmines has been invest...
Introduction: Boron neutron capture therapy (BNCT) is recommended to treat the glioblastoma tumor. It is well known that neuron beams are more effective treatment than photon beams to treat hypoxia tumors due to interaction of neutron with nucleus and production of heavy particles such as 7Li and alpha particle. In this study to evaluate the suitability of BNCT for treating of ...
A compact, step range filter proton spectrometer has been developed for the measurement of the absolute DD proton spectrum, from which yield and areal density (ρR) are inferred for deuterium-filled thin-shell inertial confinement fusion implosions. This spectrometer, which is based on tantalum step-range filters, is sensitive to protons in the energy range 1-9 MeV and can be used to measure pro...
The D(d, n)3He reaction is one of the common monoenergetic neutron sources. We compile Frag Data table from literature as an external cross-section data for PHITS. confirm validity by calculation total and angular yield calculations ideal deuterium thin target. Finally, PHITS with applied to spectrum gas target deuterium-loaded titanium Tohoku University Fast Neutron Laboratory.
Tungsten isotope compositions of magmatic iron meteorites yield ages of differentiation that are within 72 Ma of the formation of CAIs, with the exception of IVB irons that plot to systematically less radiogenic compositions yielding erroneously old ages. Secondary neutron capture due to galactic cosmic ray (GCR) irradiation is known to lower the eW of iron meteorites, adequate correction of wh...
Introduction: In recent years, the use of neutrons has increased in various fields such as medicine and industry. One of the important applications of neutrons is in medical research. Neutrons have greater linear energy transfer than gamma rays and are considered more dangerous radiation. Hence, the detection and determination of neutron dose is a very important and vital issu...
introduction:owing to its favorable radionuclidic characteristics, such as tl/2 = 6.73 day and eβ (max) = 497 kev and ease of its large-scale production using medium flux research reactors, lutetium-177 (177lu) is an attractive radionuclide for various therapeutic applications. no carrier added (nca) 177lu was obtained by thermal neutron bombardment (4×1013n/cm2.s) of 176yb target through 176yb...
Recently, a new Neutron Radiography (NR) beam line has been designed, constricted, installed and tested based on the use of E-beam tube of Tehran Research Reactor (TRR). Initial tests have been shown that the system can be used for different samples and purposes such as nuclear plates and rods fuels. For this end the system need a suitable irradiation room which should be installed at the NR b...
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