Results 131 to 140 of about 26,511 (166)

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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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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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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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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On the growth of temperature within neutron stars

Astrophysics, 1979
Analytic expressions are obtained that describe the variation of the temperature in the degenerate layers of the shell of a neutron star with electron heat conduction. The relativistic expression is used for the coefficient of thermal conductivity, and a possible crystallization of the ions is taken into account. For a neutron star with solar mass of 1
V. A. Urpin, D. G. Yakovlev
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Influence of Temperature on the Groups of Slow Neutrons

Nature, 1936
WE have investigated the influence of temperature on the activation of silver by slow neutrons, separating the effects due to the groups A, B and C as defined by Amaldi and Fermi1. The arrangement used is shown in plan in Fig. 1. Absorbers of cadmium (0.258 gm./cm.2) and silver (0.077 gm./cm.2) were employed to separate the groups, and the use of a ...
A. ARSENJEWA-HEIL, O. HEIL, C. H. WESTCOTT   +2 more
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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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