Pyotr Leonidovich Kapitsa

Пётр Леонидович Капица
Soviet Union Russia 1894–1984 ○ Natural causes

Nobel laureate who discovered superfluidity and refused to work under Beria

Over the last two decades, fundamentally new directions in world technology based on new discoveries in physics all developed abroad, and we adopted them only after they had received indisputable recognition. — Letter to Stalin, 1946

Soviet experimental physicist. Trained under Rutherford at Cambridge and detained in the USSR in 1934. Discovered the superfluidity of liquid helium in 1937 and famously refused to work under Beria on the atomic bomb project. Awarded the 1978 Nobel Prize in Physics.

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The 1934 Detention: From Cambridge to the USSR

Kapitsa worked under Rutherford at Cambridge's Cavendish Laboratory from 1921, earning international recognition for his ultrastrong magnetic field research. He became a Fellow of the Royal Society in 1929, and in 1933 the Society spent £15,000 to build the Mond Laboratory specifically for him. In September 1934, Kapitsa arrived in Leningrad with his wife to attend the Mendeleev centenary congress. Soviet authorities barred his return to England. Kuibyshev and Kaganovich proposed 'arrest as a last resort' to Stalin, who ordered that Kapitsa 'must be detained.' Devastated, Kapitsa considered abandoning physics to become Pavlov's assistant and appealed to Einstein and Rutherford. The Soviet government purchased the Mond Laboratory equipment for £30,000, and in 1935 the Institute for Physical Problems (IFP) opened in Moscow, allowing Kapitsa to resume his research.

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