Observation of the radiative transitions between 4d(9)(D-2(5/2,3/2))5s(2)nl and 4d(10)5p(P-2(1/2,3/2)0)nl autoionization states of cadmium atom excited by electron-ion collisions

摘要

Radiative transitions between the 4d(9)(D-2(5/2,3/2))5s(2)nl and 4d(10)5p(P-2(1/2,3/2)0)nl autoionization states of the cadmium atom, representing dielectronic recombination satellites of the laser lines of Cd+ ion with lambda = 325.0 nm (4d(9)5s(2) D-2(3/2) -> 4d(10)5p(2)P(1/2)(0)) and lambda = 353.6 nm (4d(9)5s(2) D-2(3/2) -> 4d(10)5p(2)P(3/2)(0)), have been observed for the first time in the regime of electron-ion collisions. The energy dependence of the effective cross sections for the electron-impact excitation of satellite lines has been studied in the interval from 7 to 10 eV. The effective cross sections for the excitation of dielectronic recombination satellites are on the order of similar to 10(-17) cm(2), which is comparable with the efficiency of excitation of the main laser lines. (C) 2005 Pleiades Publishing, Inc.