Results 221 to 230 of about 52,108 (269)
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A new fission chamber dedicated to Prompt Fission Neutron Spectra measurements
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2016Abstract New fission chambers dedicated to Prompt Fission Neutron Spectra measurements with the time-of-flight technique have been developed. The actinide mass embedded in the chamber was maximized, while the alpha-fission discrimination and the time resolution were optimized.
B Laurent, G Belier, C Varignon
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On the impact of the fissile coating on the fission chamber signal
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2012Abstract In this paper, we address the question of how the signal of a uranium fission chamber is sensitive to the thickness of its fissile coating. We first review the electrodeposition technique in order to status on the maximum surface density reasonably achievable.
C Jammes, P Filliatre, B Geslot
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Electrical characteristics of fission chambers
Journal of Nuclear Energy (1954), 1954Abstract This paper contains a brief discussion of the factors affecting the performance of the fission chambers whose construction is described in a separate paper. Operating conditions bia bias curves are given.
J.E.R. Holmes +3 more
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Advances on fission chamber modelling
2013 3rd International Conference on Advancements in Nuclear Instrumentation, Measurement Methods and their Applications (ANIMMA), 2013In-vessel, online neutron flux measurements are routinely performed in mock-up and material testing reactors by fission chambers. Those measurements have a wide range of applications, including characterization of experimental conditions, reactor monitoring and safety.
Philippe Filliatre +3 more
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Flux Perturbation Produced by Ion Chambers and Fission Chambers
Nuclear Science and Engineering, 1959When flux measurements are made in reactors or in piles, large ion chambers are commonly used. The current output of these chambers is read in terms of flux. The chambers depress the flux, however, and a correction should be applied to get the value of the unpenturbed flux.
Alain Sola, William W. Managan
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Application of Fission Chamber to Uranium Microanalysis
Japanese Journal of Applied Physics, 1983The possibility of using a fission chamber for quantitative analysis of uranium impurity in dynamic memory materials was studied. The fission chamber had two pairs of parallel disk electrodes. One electrode of each pair was used as a collector and was made of Teflon with a pure aluminum coating, while the other electrode was the material to be ...
Kimio Yamada +3 more
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Photofission in fission chambers
Nuclear Instruments, 1958Abstract During shielding measurements in water on LIDO a large discrepancy was observed between fast neutron flux measurements with fission chambers and those using activation techniques. This effect is shown to be due to photofission of the fissionable material in the chambers.
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A reaction chamber for isomeric fission measurements
Nuclear Instruments and Methods, 1972Abstract A reaction chamber has been designed and constructed to allow measurements of the fission modes from isomers having about 10 −2 half life. Fission modes are obtained from coincident measurement of the energies of fragment pairs from each isomeric fission.
E.J. Feldl, R.B. Leachman
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Fast multilayer fission chamber with 239Pu
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1994Abstract For the investigation of neutron induced fission of heavy nuclei in the resonance energy range the fast multilayer ionization fission chamber with a 239Pu content of 1.6 g was constructed. The chamber is compact and a minimum of material has been used for its construction.
A.A. Bogdzel +4 more
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Interpretation of Threshold Fission Chamber Signals
Atomic Energy, 2001The total thermonuclear-neutron fluxes in the two energy groups 1.4–6.5 and 6.5–14.2 MeV are determined by mathematical analysis of the signal from a fission chamber with 238U using two proposed values of the effective fission threshold cross sections σeff1 and σeff2 in these groups and the generally accepted effective threshold cross section σeff ...
Yu. A. Kashchuk, V. V. Frunze
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