EFFECT OF LASER EXCITATION OR ELECTRIC-FIELD ON THE OPTICAL-ABSORPTION OF QUENCHED AND X-RAY-IRRADIATED TGS SINGLE-CRYSTALS

Optical absorption of triglycine sulphate (TGS) single crystals under a combination of treatments like quenching, laser excitation, ac field treatment, X-ray irradiation was studied. As-cleaved TGS crystals sho wed a band at 215 nm, crystals subjected to quenching or X-ray irradia tion increased only height of the band. Development of a new band arou nd 280 nm at the cost of the 215 nm band occurred when the quenched an d X-ray irradiated TGS crystals were subjected to laser excitation or ac field treatment. Similar absorption characteristics were also obser ved in quenched, laser excited (or ac field treated) and X-ray irradia ted TGS crystals which were subsequently subjected again to laser exci tation (or ac field treatment).