Ivan Borgman

Ivan Ivanovich Borgman was a Russian physicist who first demonstrated in 1897 that Xrays and radioactive materials induced thermoluminescence.

Borgman was born to a Russified Finnishborn father and a Russian mother. He entered the Physics and Mathematics department of Saint Petersburg State University, in 1866 and graduated in 1870. In 1873, Borgman went to the University of Heidelberg, where he attended lectures and studied in the laboratory under the German physicist Gustav Kirchhoff. In 1875 he was appointed as a laboratory assistant at St. Petersburg University. Borgman received his Doctorate in 1882 after defending his thesis On Slight heating of iron in the magnetization.

Source: Wikipedia