CROSS-SECTIONS FOR THE COLLISIONS OF ALKALINE-EARTH ATOMS IN THE P-3 EXCITED-STATE WITH CHLORINE MOLECULE

The total attenuation cross sections, σ*, were measured for collisions of an excited atomic beam of Mg, Ca or Sr with a target of Cl2 molecules. The experimental σ* values equal: 85 Å2, 100 Å2 and 180 Å2 for Mg*, Ca* and Sr*, respectively. Moreover, the reactive cross sections, öģ were calculated, assuming the “harpoon mechanism” for the reactions in question. The obtained values are: σȓ* (Mg* + Cl2) ≦ 61 Å2, σȓ* (Ca* + Cl2) ≦ 102 Å2, σģ* (Sr* + Cl2) ≦ 130 Å2. The good agreement between the experimental and theoretical values shows that for this type of reaction the “harpoon mechanism” takes place. © 1979, Walter de Gruyter. All rights reserved.