Skip to main content
OSTI.GOVU.S. Department of Energy Office of Scientific and Technical Information
U.S. Department of Energy
Office of Scientific and Technical Information
 

THE MEAN NUMBERS OF PROMPT NEUTRONS PRODUCED IN PHOTOFISSION OF Th$sup 232$ AND U$sup 238$ BY THE $gamma$-RAYS FROM THE F$sup 19$(p,$alpha$$gamma$)O$sup 16$ REACTION (in Russian)

Journal Article · · Atomnaya Energ.
OSTI ID:4151249
;
S>The mean number of prompt neutrons nu -bar emitted per U/sup 238/ and Th/sup 232/ photofission by gamma rays from the F/sup 19/( p, alpha gamma q)O/ sup 16/ reaction produced in CaF/sub 2/ bombardment by 2.6 Mev protons was measured. The gamma spectrum has three lines of approximately 12 Mev from Fi/ sup 19/(p, gamma )Ne/sup 20/ was less than 0.2%. The mean gamma energy in U/ sup 238/ and Th/sup 232/ fissions was approximately 6.7 Mev. Measurements were made with a Van de Graaff electrostatic generator. The number of neutrons in U/sup 238/ and Th/sup 232/ fission was correlated with the corresponding number for spontaneous fission of Pu/sup 240/, determined with an order of accuracy of 2% to be nu -bar/sub 0/ = 2.26 plus or minus 0.05. After experimental corrections the ratio nu / nu /sub 0/ for the uranium was 1.86 plus or minus 0.09 and for thorium 1.42 plus or minus 0.09. Using these values, the /sub u/= 4.2 plus or minus 0.2 and nu /sub Th/ = 3.2 plus or minus 0.2. The obtained data show that a larger fragment deformation is found in U/sup 238/ and Th/sup 232/ photofission than in neutron fission. (R.V.J.)
Research Organization:
Originating Research Org. not identified
NSA Number:
NSA-14-017355
OSTI ID:
4151249
Journal Information:
Atomnaya Energ., Journal Name: Atomnaya Energ. Vol. Vol: 8
Country of Publication:
Country unknown/Code not available
Language:
Russian

Similar Records

MEASUREMENT OF $mu$ IN FAST NEUTRON FISSION OF Th$sup 232$ AND U$sup 23$$sup 8$
Journal Article · Thu Nov 30 23:00:00 EST 1961 · Nuclear Sci. and Eng. · OSTI ID:4821054
NUMBER OF PROMPT NEUTRONS EMITTED PER THORIUM-232 FISSION
Journal Article · Tue Sep 01 00:00:00 EDT 1959 · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D · OSTI ID:4215805
MEASUREMENT OF THE AVERAGE NUMBER OF PROMPT NEUTRONS EMITTED IN THE FISSION OF Th$sup 232$ INDUCED BY 14 Mev NEUTRONS
Journal Article · Wed Jul 16 00:00:00 EDT 1958 · Compt. rend. · OSTI ID:4321117

Related Subjects

ALPHA PARTICLES-- CALCIUM FLUORIDES-- DISTURBANCES-- ENERGY-- ENERGY LEVELS-- ENERGY RANGE-- ERRORS-- FLUORINE 19-- GAMMA RADIATION-- GAMMA SOURCES-- MEASURED VALUES-- MEV RANGE-- NEON 20-- NUCLEAR REACTIONS-- OXYGEN 16-- PHOTONS-- PROTON BEAMS-- SPECTRA-- TARGETSa
EFFICIENCY-- ENERGY-- ENERGY RANGE-- ERRORS-- FISSION PRODUCTS-- GAMMA RADIATION-- GAMMA SOURCES-- MEASURED VALUES-- MEV RANGE-- PHOTOFISSION-- PHOTONS-- PLUTONIUM 240-- PROMPT NEUTRONS-- TARGETS-- THORIUM 232-- URANIUM 238
PHYSICS