화학공학소재연구정보센터
Journal of Physical Chemistry, Vol.98, No.46, 11931-11941, 1994
Fast Metal-Atom Generation by Laser Vaporization of Cu, Zn, and Ni Compounds
Fast metal atoms, generated when irradiating copper, zinc, and nickel compounds with 10 ns, 532 nm laser pulses in high vacuum, are investigated. The metal-atom intensities are observed to be more than an order of magnitude higher when irradiating compounds as opposed to the pure metal samples. At laser power densities below 10(9) W cm(-2), the metal-atom velocity distributions are generally well described by shifted Maxwellian distributions. At laser power densities exceeding 10(9) W cm(-2), the velocity distributions become distinctly non-Maxwellian for most investigated systems. Very fast Rydberg atoms are observed at the highest laser power densities and are attributed to three-body recombination collisions following plasma formation.