A MEASUREMENT ON ENERGY-POOLING COLLISION CROSS SECTION IN Mg

The energy-pooling collision cross section for the transfer from 3s3p¹P to 3s4s³S of Mg has been determined by measuring the relative intensity of the fluorescence at 5184 Å and 2852 Å. The average cross section is (3.1±40%) x10^-15cm². By considering the influence of radiation trapping and other uncertain effects, the absolute uncertainty of our measurement is within one order of magnitude.