107 FLORENSOV 



he discovered the phenomena of spontaneous fission of heavy 

 nuclei. He discovered nuclear fission under influence of a 

 neutral component of cosmic rays. 

 Bibliography: 



Absorption of slow neutrons by cadmium and mercury. 



Zhur. Eksptl. i Teoret. Fiz., 1939, 9, #2. 



and K. A. Petrzhak. Spontaneous fission of uranium. Zhur. 



Eksptl. i Teoret. Fiz., 1940, 10, #9-10. 



and L. I. Rusinov . Experiments in uranium fission. Izvest. 



Akad. Nauk S.S.S.R., Ser. Fiz., 1940, 4, #2. 



and I. S. Panasyuk. Spontaneous fission of thorium. Doklady 



Akad. Nauk S.S.S.R., 1941, 30, #8. 



and F. A. Alekseev . The Utilization of Radioactive Radiation 



in Prospecting and Exploitation of Oil Deposits in the U.S.S.R. 



Moscow: 1955. 



and others . Spontaneous fission of thorium. (Letter to the 



editorial board) Zhur. Eksptl. i Teoret. Fiz., 1955, 28, #4. 



and V. V. Volkov, L. Pomorskii, Ya. Tys . Observation of a 



three neutron capture reaction and a rupture reaction of 



three protons in the interaction of N^^ and Ne^O ions with 



C, Al, Cu, and Ta nuclei. Zhur. Ekspt'l. i Teoret. Fiz. 1962, 



42, #2, 635-37. 

 Office: Department of Physico-Mathematical Sciences of 



USSR Academy of Sciences 

 Pyzhevskii Pereulok, 3 

 Moscow, USSR 



FLORENSOV, NIKOLAI ALEKSANDROVICH (Geologist) 



N. A. Florensov was born in 1909. In 1936, he graduated 

 from the Irkutsk State University, where he was an assistant 

 from 1937-38, senior instructor 1938-40, a docent and de- 

 partmental chairman 1940-56, and from 1956 to 1959, a pro- 

 fessor and departmental chairman. From 1945 to 1947, he was 

 also the Chief Geologist of the Irkutsk Geological Adminis- 

 tration. In 1949 he also began work at the Eastern-Siberian 

 branch of the U.S.S.R. Academy of Sciences, and in 1959 be- 

 came the director of the division on regional geology of the 

 U.S.S.R. Academy of Sciences East-Siberian Geological Insti- 

 tute. Florensov was awarded the title of Honored Scientist and 

 Technologist by the Buryat A.S.S.R. in 1959, and in 1960 was 

 made a Corresponding Member of the U.S.S.R. Academy of 

 Sciences. 



Florensov' s work has been in the field of East-Siberian 

 tectonics and neotectonics. 



