DELAYED NEUTRON YIELDS FROM THE FISSION OF Pu$sup 239$ AND TH$sup 232$ INDUCED BY 14.5-Mev NEUTRONS (in Russian)
Journal Article
·
· Atomnaya Energ.
OSTI ID:4817856
Previous measurements indicated that in the fission of U/sup 235/ induced by 2.4-, 3.3- and 14.5-Mev monoenergetic neutrons, the delayed neutron yield remains unchanged up to 3.3 Mev and at 14.2 Mev it is increased by a factor of 2; similar observations were made with the even nuclei of U/sup 238/ and Th/ sup 232/. This made it of interest to study the delayed neutron yield of the fission of Pu/sup 239/ and Th/sup 232/ with 14.5-Mev neutrons, defining the delayed neutron yield as the ratio of delayed neutrons generated in 1 sec to the total number of fissions in the same period. The Cd-clad Pu or Th targets were exposed to a 14.5-Mev neutron flux from the T(d,n)He/sup 4/ reaction, using B counters in a paraffin block as detectors. The total yield was found to be 0.0130 plus or minus 0.0015 for Pu/sup 239/ and 0.075 plus or minus 0.007 for Th/sup 232/. The latter figure agrees well with previously published data. The Pu/sup 239/ yield is increased by a factor of 2 when the 14.5-Mev neutrons are used; this is attributed to the increased probability of neutron emission by a given nucleus. (TTT)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-16-008173
- OSTI ID:
- 4817856
- Journal Information:
- Atomnaya Energ., Journal Name: Atomnaya Energ. Vol. Vol: 11
- Country of Publication:
- Country unknown/Code not available
- Language:
- Russian
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Related Subjects
ANISOTROPY
CADMIUM
CONFIGURATION
COUNTERS
DEFORMATION
DELAYED NEUTRONS
DEUTERON BEAMS
DIFFERENTIAL EQUATIONS
EMISSION
ENERGY LEVELS
ENERGY RANGE
EXCITATION
FISSION
FISSION PRODUCTS
HAMILTONIAN
HELIUM 4
MATHEMATICS
MEASURED VALUES
MEV RANGE
NEUTRON BEAMS
NEUTRON FLUX
NILSSON MODEL
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEAR THEORY
NUCLEI
NUMERICALS
PARAFFIN
PHYSICS
PLUTONIUM 239
PROBABILITY THEORY
RADIATION DETECTORS
SHELL MODELS
SPHERES
STATISTICS
TARGETS
THORIUM 232
TRITIUM
URANIUM 235
URANIUM 238
CADMIUM
CONFIGURATION
COUNTERS
DEFORMATION
DELAYED NEUTRONS
DEUTERON BEAMS
DIFFERENTIAL EQUATIONS
EMISSION
ENERGY LEVELS
ENERGY RANGE
EXCITATION
FISSION
FISSION PRODUCTS
HAMILTONIAN
HELIUM 4
MATHEMATICS
MEASURED VALUES
MEV RANGE
NEUTRON BEAMS
NEUTRON FLUX
NILSSON MODEL
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEAR THEORY
NUCLEI
NUMERICALS
PARAFFIN
PHYSICS
PLUTONIUM 239
PROBABILITY THEORY
RADIATION DETECTORS
SHELL MODELS
SPHERES
STATISTICS
TARGETS
THORIUM 232
TRITIUM
URANIUM 235
URANIUM 238