Results 181 to 190 of about 2,298 (210)

Neutron Transport with Temperature Feedback

Nuclear Science and Engineering, 1976
We consider a nonlinear neutron transport problem in a finite homogeneous body with temperature feedback.
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Neutron Diffraction Study of Water At High Temperature

Europhysics Letters (EPL), 1992
Neutron diffraction measurements on water at T = 523 K are presented. The comparison with room temperature data shows an evident weakening of the tetrahedral coordination. This effect has been accurately simulated by an ensemble of polarizable water molecules, interacting via the NEMO (Non Empirical Molecular Orbital) potential model.
U. Buontempo, POSTORINO, Paolo, M. A. Ricci, A. K. Soper   +3 more
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Effects of temperature on the structure of neutron stars at high temperature

General Relativity and Gravitation, 2017
In Newtonian physics, higher temperature leads to higher thermal pressure, which provides stronger support against the gravitational contraction of stars. However, in the temperature range of tens of MeV involved in the evolution of a proto-neutron star or a higher massive neutron star, the effects of temperature are richer.
Liang-gui Zhu, Jun-Li Lu, Li Wang
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Slowing Down Spectrum and Neutron Temperature in a Thermal Neutron Flux Density Standard

Metrologia, 1966
Epithermal and thermal flux parameters for the thermal flux density standard at the National Research Council have been measured to allow a more accurate calculation of activation rates. The epithermal spectrum is found to follow a E-0.95 law, where E is the neutron energy.
Geiger, K. W., van der Zwan, L.
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Neutron temperature measurements with 176Lu

Journal of Nuclear Energy. Part A. Reactor Science, 1959
A relative calibration of the Lu/sup 176/(n, gamma y) reaction is reported. It was found that the Lu/sup 176/(n, gamma ) reaction is potentially capable of measuring neutron temperature in the 0 to 110 deg C range to about 5 deg C. (C.J.G.)
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A low-temperature Weissenberg camera for neutrons

Journal of Applied Crystallography, 1981
The construction and performance of a neutron Weissenberg camera for temperatures down to 4 K is described. Exposure times are similar to the X-ray case. The background from the cryostat walls can be eliminated. Examples of applications in the fields of magnetic structures which are incommensurate with their chemical unit cells, crystallographic phase ...
D. Hohlwein, A. F. Wright
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Analysis of neutron-temperature oscilations in neutron multiplying systems with delayed neutrons

2017
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Vodyanitskii, A.A., Rudakov, V.A.
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High Temperature Neutron Diffraction Furnace

Review of Scientific Instruments, 1966
An induction transformer furnace for a neutron diffractometer is described. This furnace has been used for the examination of refractory carbides by neutron diffraction at temperatures up to 2500°C.
M. G. Bowman, D. E. Hull, W. G. Witteman, G. P. Arnold, A. L. Bowman   +4 more
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Neutron Capture Data at Stellar Temperatures

Reviews of Modern Physics, 1965
Neutron capture cross sections are averaged over Maxwell-Boltzmann neutron distributions for temperatures pertinent to slow nucleosynthesis ($s$ process) in red giant stars. Such cross sections, together with isotopic abundances, provide the major quantitative experimental tests of the theory.
R. L. MACKLIN, J. H. GIBBONS
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Temperature measurement by neutron resonance radiography

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1989
Abstract We present a new method of data analysis for determination of temperature from the Doppler broadening of neutron resonance absorption cross sections. The method is model independent and simple to use. It has been applied to measurements on samples of rhenium and tantalum and has given temperatures to an accuracy better than ±1°C.
J. Mayers, G. Baciocco, A.C. Hannon
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