نتایج جستجو برای: fission chamber
تعداد نتایج: 56261 فیلتر نتایج به سال:
The 239Pu(n,f)/235U(n,f) cross-section ratio has been measured with the fission Time Projection Chamber (fissionTPC) from 100 keV to MeV. fissionTPC provides three-dimensional reconstruction of fission-fragment ionization profiles, allowing for a precise quantification measurement uncertainties. was performed at Los Alamos Neutron Science Center which pulsed white source neutrons. data are reco...
A series of measurements of neutron induced fission cross section of various TRU isotopes have been performed at the CERN n TOF spallation neutron facility, in the energy range from thermal to nearly 250MeV. The experimental apparatus consists in a fast ionization chamber (FIC), used as a fission fragment detector with a high efficiency. Good discrimination between alphas and fission fragments ...
A new fission chamber was developed and built for prompt-fission-neutron spectra (PFNS) measurements in neutron-induced of actinides, is described Taieb et al. (2016). It allowed us to minimize incident- outgoing-neutron scattering, optimize both time resolution alpha fragment discrimination. The validated used 238U 252Cf PFNS measurements. In order measure samples with a natural activity the 1...
Neutron - induced fission cross - section of 233 U in the energy range 0 . 5 < En < 20 MeV The n TOF
The neutron-induced fission cross-section of U has been measured at the CERN n TOF facility relative to the standard fission cross-section of U between 0.5 and 20MeV. The experiment was performed with a fast ionization chamber for the detection of the fission fragments and to discriminate against α-particles from the natural radioactivity of the samples. The high instantaneous flux and the low ...
Thin targets of 238U were bombarded with 45, 55, 65 and 69 MeV protons at the Cyclotron and Radioisotope Center (CYRIC) of Tohoku University in Japan. Gamma rays emitted from the fission products were recorded and analyzed by using gamma spectroscopy. Then, the cross sections for the formation of fission products, fragment mass distributions, and total fission cross sections were measured. Spec...
A Time Projection Chamber (TPC) is one of the promising candidates to perform unique measurements in solar neutrino physics. Its features will enable it to work at depths of the order of 2000 mwe. This paper describes an estimation of the expected cosmogenic background at different depths including also the background due to fission activation of the TPC material above ground.
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