The incoherent scattering of electromagnetic waves from electron-plasma oscillations in a thermal plasma is investigated. In particular, the effect of collisions on the shape of the isolated peak in the scattered intensity at a frequency displaced from the incident frequency by the plasma frequency is discussed making use of Nyquist's theorem and recent conductivity calculations.

• Received 23 May 1963

DOI:https://doi.org/10.1103/PhysRev.132.497