Multiphonon mechanism of light scattering in glasses

Fleurov, V.; Levanda, M

doi:10.1088/0953-8984/4/4/009

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Rigid Double-well Potentials1

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1992

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“…A brief description of the model for rigid DWPS is given in this section. The aim is to remind us of the principal ideas and to introduce the notation which will be used in the present as well as in the following paper (Fleurov and Levanda 1992). A more detailed account of the model and the calculations can be found in Fleurov and Trakhlenberg (1986), Goldanskii et a l (1989) and Fleurov (1989).…”

Section: Rigid Double-well Potentialsmentioning

confidence: 99%

Multiphonon mechanism of neutron scattering in glasses

Fleurov¹,

Levanda²

1992

J. Phys.: Condens. Matter

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A multiphonon mechanism of neutron scattering in glasses is considered. It is due to the interaction of the neutrons with strongly fluctuating double-well potentials characteristic of glasses which may be of importance at not too low temperatures (above the liquid helium temperature). The cross section of this process is calculated and its dependence on the temperature and the neutron energy transfer is found. It is shown that, contrary to the relaxation mechanism, the multiphonon mechanism produces a cross section without a maximum in its temperature dependence. This, as well as some other features, corresponds better to the experimental observations.

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Section: Rigid Double-well Potentialsmentioning

confidence: 99%