Electronic Energy Transfer Processes in the Alkali/Alkaline Earth Metal Vapors

摘要

Collisional energy transfer rates from highly excited 1P states to nearby 3P, 1D, 3D, and F states of Ca and Sr and fine-structure mixing within the metastable 3P state of Sr have been studied. Several collisional and stimulated population-transfers between the lowest 1P, 3P, 1D, and 3D, states Sr have been isolated, and energy-pooling in collisions between pairs of these energy storage states has been studied. These processes interconnect the excited-state populations and produce energy leakage during high energy density storage in these metastable states. During the course of these studies, several multiphoton excitation and stimulated Raman population processes have been discovered. Cross sections for electronic state-changing collision. Large and remarkably selective alignment effects have been observed for energy transfer processes in both calcium and strontium upon collisions with rare gases and with some molecules revealing a new level of detail about the precise curve crossings and electronic potentials. Keywords: Electronic energy transfer, Laser, Alkali, Alkaline earth atoms, Metal vapor.