Abstract
Gas mixture of 1 : 100 BCl3 and Xe is blown against a cold plate to form a solid film.This sample is irradiated by a cw CO2 laser.After several hours of irradiation, it is found from infrared spectra that 11BCl3 molecules are excited selectively and are educed on the cold plate as fine crystals.This phenomenon is considered to be due to laser-induced migration of 11BCl3 molecules through Xe matrix.As Xe sublimates, 10BCl3 molecules are released from the cold plate so that 11BCl3 is enriched on the plate. The value of the separation factor obtained with 3.3 watt laser radiation is estimated to be8.4.
