Journal of Physics A Mathematical and GeneralExact analysis of the spherical Raman-Nath equationSan-kui GouPublished Jul 21, 1989• 4 citationsPublisherAbstractAn exact solution of the spherical Raman-Nath equation (1937) is given. The result is applied to discuss photon statistics and squeezing properties of a free-electron laser.DOI10.1088/0305-4470/22/14/015