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Inelastic Neutron Scattering from Amorphous Germanium

 

作者: J. D. Axe,   D. T. Keating,   G. S. Cargill,   R. Alben,  

 

期刊: AIP Conference Proceedings  (AIP Available online 1974)
卷期: Volume 20, issue 1  

页码: 279-283

 

ISSN:0094-243X

 

年代: 1974

 

DOI:10.1063/1.2945974

 

出版商: AIP

 

数据来源: AIP

 

摘要:

Inelastic neutron scattering has been used to study vibrational spectra of amorphous germanium. For large momentum transfers, i.e. several times that of the first maximum in the amorphous x‐ray scattering pattern, neutron energy loss spectra should become insensitive to further changes in momentum transfer and are then simply related to the vibrational density of states. This incoherent limit neutron scattering method in principle avoids the matrix element uncertainties which enter interpretations of infrared absorption and Raman scattering experiments. Preliminary results, obtained with a 5 gram sample of evaporated amorphous germanium, indicate that the lowest energy peak in the density of states is broadened, and its center of gravity is shifted to somewhat lower energy than the corresponding TA phonon peak in the crystalline density of states.

 

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