| Issue |
Europhys. Lett.
Volume 74, Number 4, May 2006
|
|
|---|---|---|
| Page(s) | 630 - 636 | |
| Section | Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics | |
| DOI | https://doi.org/10.1209/epl/i2005-10568-1 | |
| Published online | 05 April 2006 | |
The coherent backscattering effect for moving scatterers
Center for Wave Phenomena and Department of Geophysics Colorado School of Mines, Golden, CO 80401-1887, USA
Corresponding author: rsnieder@mines.edu
Received:
20
October
2005
Accepted:
15
March
2006
The constructive interference of backscattered waves that propagate
along the same path in opposite directions doubles the intensity of
these waves. When the scatterers move during wave
propagation, the enhancement factor is reduced from 2 to a lower
value. I derive the enhancement factor for coherent backscattering
under the assumption that the scatterers move independently with a
constant velocity. The resulting enhancement value depends
exponentially on 
, which is the
ratio of the root-mean-square displacement of the scatterers during
the wave propagation to the wavelength, and on the number of
scatterers encountered.
PACS: 42.25.Bs – Wave propagation, transmission and absorption / 42.25.Fx – Diffraction and scattering / 43.20.+g – General linear acoustics
© EDP Sciences, 2006
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