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THE EMISSION OF LONG-RANGE $alpha$-PRATICLES WITH Ealpha gt 10 Mev BY Pu$sup 239$ AND Po$sup 21$$sup 0$ (in Russian)

Journal Article · · Izvestiya Akademii Nauk, Seriya Fizicheskaya (U.S.S.R.) For English translation see Bull. Acad. Sci. USSR, Phys. Ser. (Engl. Transl.)
OSTI ID:4108157
;
Ader in the J. Phys. et Radium 15: 60, 191(1954) and 17: alpha particles for each alpha decay. These alpha particles have a range of 100to 300 mu in photoemulsions (12 to 25 Mev) and are thought to be due to spontaneous or forced triple fission. A specially constracted ionization chamber was set up to count the long-range alpha particles in the presence of ordinary alpha radiation. A 10 mg sample of Pu/sup 239/ was deposited on an aluminum disk having a density of 0.5 mg/cm/sup 2/, and was covered with an aluminum foil 28 V thick. The 70 mu g sample of Po/sup 210/ was electrodeposited on a nickel plate, and was covered with a tin foil 15.3 mu thick and with two aluminum foils having a totai thickness of 14.4 mu in order to avoid the interference from an ( alpha ,p) reaction on the aluminum. The total count rates were found to be 0.55 plus or minus 0.09 counts. hr/sup -1/ for the Pu /sup 239/ sample, and 1.0 plus or minus 0.1 counts - hr/sup -1/ for the Po/sup 210/ sample for 10 to 15 Mev alpha particles. It was concluded that Pu/sup 239/ emits <10/sup -10/ long-range alpha particles per alpha decay, and Pu/sup 210/ emits <7 x 10/ sup -13/ long-range alpha particles per alpha decay at the 95% confidence level. (TTT)
Research Organization:
Originating Research Org. not identified
NSA Number:
NSA-18-007708
OSTI ID:
4108157
Journal Information:
Izvestiya Akademii Nauk, Seriya Fizicheskaya (U.S.S.R.) For English translation see Bull. Acad. Sci. USSR, Phys. Ser. (Engl. Transl.), Journal Name: Izvestiya Akademii Nauk, Seriya Fizicheskaya (U.S.S.R.) For English translation see Bull. Acad. Sci. USSR, Phys. Ser. (Engl. Transl.) Vol. Vol: 27; ISSN IANFA
Country of Publication:
Country unknown/Code not available
Language:
Russian

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Related Subjects

ALPHA DECAY
ALPHA PARTICLES
ALUMINUM
COUNTERS
DENSITY
EMISSION
ENERGY RANGE
FISSION
FOILS
IONIZATION CHAMBERS
MEV RANGE
NUCLEAR EMULSIONS
PARTICLE TRACKS
PHYSICS
PLUTONIUM 239
POLONIUM 210
THICKNESS