Unmasked: Top Oxford University professor codenamed ‘Agent Marta’ who handed over nuclear secrets to Czech spies and met her handler in Miss Selfridge
Having kept her Cold War role secret since the collapse of communism, Professor Stone – formerly Rikovska – remains a highly respected and active nuclear scientist, who published her most recent paper in January this year. Now 82, she is still a visiting researcher at Oxford University and an Adjunct Professor of Physics at the University of Tennessee, where she moved after retirement from Oxford. She is also listed on the US government's Oak Ridge National Laboratory, which specialises in nuclear research.