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Digital Archive International History Declassified

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  • October, 1940

    Technical Proposal of F. Lange, V. Maslov, and V. Shpinel, 'Fission of Uranium Isotopes by Using Method of Coriolis Acceleration'

    Kharkov Institute scientists proposed in this document the concrete steps to build a nuclear weapon. The document demonstrates that Ukrainian physicists understood how to receive weapons grade uranium and elaborated concrete technical proposals to achieve this goal through uranium enrichment in centrifuge.

  • October 17, 1940

    Claim for an Invention from V. Maslov and V. Shpinel, 'About Using of Uranium as an Explosive and Toxic Agent'

    In this letter two nuclear scientists from UIPhT described the construction of the nuclear bomb and proposed to start activities in producing of the nuclear arsenal and make these activities secret. Two Ukrainian physicists were first Soviet scientists who revealed the method of producing a nuclear weapon (of course they did not know about the similar inventions of western scientists which were made at the same time under great secrecy).

  • February, 1941

    Letter from V.A. Maslov to People’s Commissar of Defence of USSR, 'About Necessity to Organize Activities in Using of Atomic Energy in the Military Goals'

    In this letter from Victor Maslov to People's Commisar of Defence, Marshal Timoshenko, Maslov makes one final attempt to persuade Soviet leadership to start a military nuclear program, despite the strong criticism from leading Moscow scientists toward the idea.