Zur Theorie der nichtstationären Resonanzfluoreszenz an bewegten Molekülen. II. Untersuchungen zur hochauflösenden Resonanzfluoreszenzspektroskopie

Non-stationary Theory of Resonance Fluorescence for Moving Molecules. II. Highly Resolved Fluorescence Spectroscopy With respect to tke Doppler-effect a formula for the spectral energy density of fluorescence radiation of gases (vapours) generated by resonance scattering of short laser pulses is derived. The spectral energy density consists of a coherent and an incoherent part which differs in a characteristic way. The coherent fluorescence radiation reproduces the spectrum of the laser light. Informations about the homogeneous line widths are obtained only from the incoherent spectra. The results of numerical calculations of highly resolved spectra in forward and backward directions under different conditions are discussed.