Effects of reflector on intensity of thermal neutrons emitted from moderator for pulsed neutron source.

スポンサーリンク

概要

• 論文の詳細を見る

• Intensity of the thermal neutrons emitted from the moderator with a reflector was calculated to study the effects on the intensity caused by a macroscopic total neutron cross section and an average logarithmic energy loss of the reflector materials.<BR>A reflector with a large macroscopic total neutron cross section produced higher thermal neutron intensity than that with a small cross section if they had the same average logarithmic energy loss. Among the reflectors with the same total macroscopic neutron cross section, the thermal neutron intensity was not changed by decreasing the average logarithmic energy loss to a range less than about 0.1 but above this value the intensity was weakened. From this result it was found that a large macroscopic total cross section and a small average logarithmic energy loss are preferable characteristics for reflector materials.<BR>As actual reflector materials, three reflector materials were examined, namely beryllium, graphite and lead, which are now considered to be candidates. The lead reflector was effective for the moderator with a large emission-surface and the beryllium reflector for the moderator with a small one. This result indicates that the moderator size is important for choosing the best reflector material to produce the highest beam intensity.

• 一般社団法人 日本原子力学会の論文

著者

• KIYANAGI Yoshiaki

  Department of Atomic Energy, Faculty of Engineering, Hokkaido University

関連論文

• High Resolution Neutron Spectrometer LAM-80ET and Rotational Tunnelling in 4-Methypyridine N-Oxide
• Direct Observation of Effective Temperature of Ta Atom in Layer Compound TaS_2 by Neutron Resonance Absorption Spectrometer
• Quasielastic Neutron Scattering from Amorphous Polymers above Glass Transition Temperature
• Comparison of Slow-Neutron Intensities in Pulsed Spallation Neutron Sources with Various Proton Energies 0.8-3 GeV
• Pulsed neutron intensity from rectangular shaped light water moderator with fast-neutron reflector.
• Optimization of grooved thermal moderator for pulsed neutron source, and its characteristics.
• Effects of reflector on intensity of thermal neutrons emitted from moderator for pulsed neutron source.
• Time-dependence of cold neutron pulse emitted from methane at 20.DEG.K.

スポンサーリンク