Diagnostics of Pulsed Laser Action on Wide-Gap Materials Using Thermoluminescent Dosimetry

The emission spectra of wide-gap materials based on SiO 2 , Al 2 O 3 , LiF, and AlN were studied by the laser induced breakdown spectroscopy method under the action of a single neodymium laser pulse at the fundamental harmonic of 1.064 μm, pulse duration 14 ns, surface energy density 13 J cm –2 , and spot diameter on the irradiated surface ~1.5 mm. Interest in the study of these materials is due to the fact that they are used as detectors for determining absorbed doses in thermoluminescent dosimetry of ionizing and ultraviolet radiation. TLD-K (SiO 2 ) detectors are not sensitive to light and are used to determine the dose of ionizing exposure. Detectors TLD-500 (Al 2 O 3 ) and AlN along with sensitivity to ionizing radiation have a strong sensitivity to ultraviolet radiation. The use of different types of detectors makes it possible to estimate the contributions of the laser pulse energy conversion in the sample material into ionizing radiation and ultraviolet light.