Gas mixture of 1 : 100 BCl
3 and Xe is blown against a cold plate to form a solid film.This sample is irradiated by a cw CO
2 laser.After several hours of irradiation, it is found from infrared spectra that
11BCl
3 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
11BCl
3 molecules through Xe matrix.As Xe sublimates,
10BCl
3 molecules are released from the cold plate so that
11BCl
3 is enriched on the plate. The value of the separation factor obtained with 3.3 watt laser radiation is estimated to be8.4.
View full abstract