SENSITIZED FLUORESCENCE IN VAPORS OF ALKALI METALS: II. ENERGY TRANSFER IN POTASSIUM–ARGON COLLISIONS

摘要: Sensitized fluorescence in potassium, induced by argon at pressures between 0.01 mm Hg and 350 mm Hg, was investigated to determine the cross sections for collisions of second kind potassium atoms 4 2P states their ground states. The experiment carried out a vapor pressure 2 × 10−6 mm which there is no trapping resonance radiation. collision very low pressures, frequencies do not exceed one per average lifetime excited states, are Q1 = 10 × 10−15 cm2 2P1/2 → 4 2P3/2 transition Q2 = 7.2 × 10−15 cm2 2P1/2 ←  transition. At higher where much more frequent, Q1 = 1.8 × 10−15 cm2, Q2 = 1.1 × 10−15 cm2, Q1/Q2 = 1.6, exact agreement with principle detailed balancing. variation ascribed different transfer mechanisms predominating various re...