Reflection of x-rays with a change of frequency

Reflection of x-rays with a change of frequency


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ABSTRACT A CHANGE of frequency in the scattering of light or of X-rays is a familiar phenomenon. On the other hand, the coherent X-ray reflections given by crystals are a consequence of


classical optics and any change of frequency in such reflection might seem inadmissible. A closer consideration shows, however, that even on the classical theory, a change of frequency might


accompany a coherent reflection, if the structure-amplitude of the crystal planes responsible for the reflection were to vary periodically with time. This would occur, for example, when the


interpenetrating lattices in the crystal oscillate against each other with the characteristic infra-red frequencies and produce pulsations of the electron-density in the crystal. On the


principles of the quantum theory, therefore, such lattice oscillations, though initially non-existent, may be excited as the result of the incident radiation and give rise to a _coherent


reflection of altered frequency_. Access through your institution Buy or subscribe This is a preview of subscription content, access via your institution ACCESS OPTIONS Access through your


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FAQs * Contact customer support SIMILAR CONTENT BEING VIEWED BY OTHERS ANGULAR-SPECTRUM-DEPENDENT INTERFERENCE Article Open access 26 October 2021 SHAPING THE PROPAGATION OF LIGHT IN


COMPLEX MEDIA Article 08 September 2022 TRANSVERSE RECOIL IMPRINTED ON FREE-ELECTRON RADIATION Article Open access 06 September 2024 AUTHOR INFORMATION AUTHORS AND AFFILIATIONS * Department


of Physics, Indian Institute of Science, Bangalore C. V. RAMAN & P. NILAKANTAN Authors * C. V. RAMAN View author publications You can also search for this author inPubMed Google Scholar


* P. NILAKANTAN View author publications You can also search for this author inPubMed Google Scholar RIGHTS AND PERMISSIONS Reprints and permissions ABOUT THIS ARTICLE CITE THIS ARTICLE


RAMAN, C., NILAKANTAN, P. Reflection of X-rays with a Change of Frequency. _Nature_ 145, 860 (1940). https://doi.org/10.1038/145860a0 Download citation * Issue Date: 01 June 1940 * DOI:


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