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Title: Measurement of thermal neutron waves at high frequencies in BeO
Authors: Ritchie, AIM
Whittlestone, S
Keywords: Thermal neutrons
Neutron transport theory
Spatial distribution
Phase shift
Wave propagation
Issue Date: Mar-1972
Publisher: Australian Atomic Energy Commission
Citation: Ritchie, A. I. M., & Whittlestone, S. (1972). Measurement of thermal neutron waves at high frequencies in BeO. (AAEC/TM617). Lucas Heights, NSW: Australian Atomic Energy Commission.
Abstract: The amplitudes and phases of neutron waves have been measured in a BeO assembly in the frequency range 515.7 Hz. The results confirm earlier measurements that below ~ 520 Hz the neutron wave has the properties of a discrete mode of propagation. At frequencies > 720 Hz the attenuation α(z) and phase shift parameters ζ(z) change with distance from the source, the change being more marked the higher the frequency. The observed spatial variations of α(z) and ζ(z) do not agree with present theoretical predictions. Interference effects predicted by theory have not been observed.
Gov't Doc #: 903
ISBN: 0642994536
Appears in Collections:Scientific and Technical Reports

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