Influence of Ar, Ne, Xe, and CCl_(4) Impurities on Luminescence Kinetics of Cd II Ions (5s~(2) ~(2)D_(5/2)-5p ~(2)P_(3/2) Transition, lambda velence 441.6 nm) in He-Cd Mixture

摘要

The luminescence kinetics of the Cd II ion at a wavelength of 441.6 nm has been studied experimentally in a high-pressure He-Cd mixture in the presence of Ar, Ne, Xe, and CCl_(4) impurities. Cadmium ions were excited through the bombardment of a cadmium foil heated up to 240 deg C by a pulsed electron beam with an electron energy of 150 keV, a pulse duration of 3 ns, and a current of 500 A. The constants of collisional quenching of the Cd II 5s~(2) ~(2)D_(5/2) level by Ar, Ne, and Xe atoms and CCl_(4) molecules and the integral luminescence quenching constants of this level in the helium medium by these impurity gases have been determined. The constants of collisional quenching appeared to be 8.1 X 10~(-12) (Ar), 1.2 X 10~(-12) (Xe), 1.5 X 10~(-13) (Ne), and 1.8 X 10~(-10) cm~(3)/s (CCl_(4), for lambda velence 325 nm), while the integral constants were found to be, respectively, 4.1 X 10~(-11), 3.4 X 10~(-11), 9.5 X 10~(-12), 1.4 X 10~(-9) cm~(3)/s for Ar, Ne, Xe, and CCl_(4) at a buffer gas pressure of 1 atm.