EXCITATION TRANSFER BETWEEN UPPER SE-COLUMN HE-SE+ LASER( LEVELS IN APOSITIVE)

The rate coefficients for collision induced transitions from a laser l evel to neighboring levels of active medium particles are theoreticall y connected with the intensity of the spontaneous emission originating from these levels and its variation due to 100% modulation of the las er oscillation. The levels pertaining to the configuration 4s(2)4p(2)( P-3)5p of Se+ are explored at conditions of operation of a positive co lumn He-Se+ laser. Normalized population transfer rate coefficients ar e defined. Their values are obtained based on the measured spontaneous emission intensity and its variation. The dominating partners for the mixing collisions with excited selenium ions are suggested as Se+, Se and He+ in contrast with the free electrons and helium atoms.