He Zehui

He Zehui or Ho Zah-wei was a Chinese nuclear physicist who worked with Walther Bothe in Nazi Germany during World War II and with Irène Joliot-Curie in Paris, and later helped develop the Chinese nuclear programme. She is credited with discovering the phenomenon of elastic collision between positrons and electrons by 1945, and – jointly with her husband Qian Sanqiang – ternary and quaternary fission in the uranium nucleus in 1946.