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The detection of solar ultraviolet-C radiation using KCl: thermoluminescence dosemeters

The thermoluminescence excitation spectrum of single crystals of was measured and its convolution with solar spectral irradiances reaching the ground was estimated from a radiation-transfer model. The same crystals were used to register direct solar ultraviolet-C radiation reaching the ground at Madrid (N, W, 700 m ASL) on clear-sky days. By comparing the ultraviolet dose thermoluminescence sensitivity with the measured dose of solar irradiation, we concluded that, although UV-C irradiation at ground level is six orders of magnitude smaller than the UV-B, the solar UV-C radiation at ground level is nonetheless detectable and can be measured using dosemeters.