Accession Number : ADA267460


Title :   Recoil-Induced Resonances in Pump-Probe Spectroscopy Including Effects of Level Degeneracy


Corporate Author : NEW YORK UNIV NY DEPT OF PHYSICS


Personal Author(s) : Guo, J ; Berman, P R


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a267460.pdf


Report Date : May 1993


Pagination or Media Count : 15


Abstract : Theoretical calculations are presented for the probe absorption spectra of atoms having magnetically degenerate ground states which are subjected to weak pump fields that produce spatial polarization gradients. Apart from the Raman resonance contribution to the spectrum which has been observed experimentally, we predict that additional resonant structures should appear as a result of the atomic recoil that occurs during the absorption or emission of radiation by the atoms. The width of the atomic recoil resonances is directly related to the Doppler width associated with the driven transition. For sub- Doppler cooled atoms, the width can be much narrower than the optical pumping rate that determines the width of the Raman signal.


Descriptors :   *MAGNETIC PROPERTIES , *SPECTROSCOPY , *RESONANCE , *DOPPLER EFFECT , *COOLING , *ATOMIC STRUCTURE , *RECOIL ATOMS , *OPTICAL PUMPING , VELOCITY , FREQUENCY , EMISSION , POLARIZATION , GROUND STATE , ATOMIC ENERGY LEVELS , GRADIENTS , RAMAN SPECTRA , ABSORPTION SPECTRA , WIDTH , SIGNALS , FOUR WAVE MIXING , EXCITATION , COMPUTATIONS , SPATIAL DISTRIBUTION , REPRINTS , RADIATION


Subject Categories : Electricity and Magnetism
      Atomic and Molecular Physics and Spectroscopy
      Nuclear Physics & Elementary Particle Physics


Distribution Statement : APPROVED FOR PUBLIC RELEASE