Lise Meitner was an Austrian-Swedish physicist. She became the second woman to gain a PhD in physics at @univienna in 1905. In 1917, Meitner and Otto Hahn discovered the first long-lived isotope of protactinium while at the Kaiser-Wilhelm-Institut (KWI). #STEMlegends #WomenInSTEM In 1922, Meitner discovered the Auger emission process. This describes how a photon or electron is emitted from an atom when the inner-shell is filled by an electron. This effect is named after Pierre Auger who made the same discovery as Meitner independently, the following year.