Modified reflection of X-rays

Raman, C. V. ; Nilakantan, P. (1940) Modified reflection of X-rays Nature, 146 (3703). p. 523. ISSN 0028-0836

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As stated in an earlier communication, quantum theory leads to the remarkable conclusion that the reflection of X-rays in crystals is of two types; first, the classical or unmodified reflections associated with the normal structure amplitudes of the crystal; and secondly, the quantum or modified reflections which arise when the vibrations of the crystal lattice are quantum-mechanically excited by the incident X-radiation. The direction and intensity of the reflections of the second kind have been considered theoretically in a recent paper. It is shown that when the energy taken up by the crystal lattice is in the form of acoustic waves, the recoil of the photon is observable as a diffuse scattering of the incident X-radiation, while on the other hand, when the optical vibrations of the crystal lattice are excited, the resulting effect is a regular reflection of the incident radiation.

Item Type:Article
Source:Copyright of this article belongs to Nature Publishing Group.
ID Code:52542
Deposited On:04 Aug 2011 07:38
Last Modified:04 Aug 2011 07:38

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