Collisional broadening and shift of Doppler-free two-photon thallium lines perturbed by rare-gas atoms
Institute of Physics, Nicholas Copernicus University,
Grudziądzka 5/7, 87-100 Toruń, Poland
Accepted: 18 November 1998
Published online: 15 March 1999
The extended Omont-Ueda-Kaulakys treatment of collisional effects on quasi-Rydberg states, in which the perturbation of the lower state is taken into account is applied to thallium-rare gas systems. The pressure broadening and shift coefficients of two-photon transitions in thallium involving the (n = 9-14) states are calculated and compared with experimental data obtained by Hermann et al. [Eur. Phys. J. D 1, 129 (1998)].
PACS: 32.70.-n – Intensities and shapes of atomic spectral lines / 31.50.+w – Excited states / 34.20.-b – Interatomic and intermolecular potentials and forces, potential energy surfaces for collisions
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 1999