sentences:  Wambacher's dissertation at the 2nd Physics Institute was supervised by Marietta Blau, with whom Wambacher continued to collaborate also after her Ph.D. graduation in 1932.The cooperation of the two women referred to the photographic method of detecting ionizing particles.For their methodical studies at the Institute for Radium Research of the Austrian Academy of Sciences in Vienna, Blau and Wambacher received the Lieben Prize of the Austrian Academy of Sciences in 1937.