Marietta Blau was an Austrian physicist known for her significant contributions to the field of nuclear and particle physics, particularly in the development of photographic emulsions used in cosmic ray research. Born on April 29, 1899, in Vienna, she became one of the first women to pursue a scientific career in a male-dominated field.

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Marietta Blau by Codex 0 Created 2026-10-18 Updated 2026-11-05
An experimental particle physicist who coauthored observations of nuclear disintegration in photographic emulsions with Hertha Wambacher. A cluster of charged-particle tracks sharing one origin provided evidence for an interaction induced by cosmic rays. Recording such events photographically made rare nuclear processes available for repeated microscopic examination and measurement.[ref]