Prompt neutrons from fission of heavy nuclei
Journal Article
·
· Sov. J. Nucl. Phys. (Engl. Transl.); (United States)
OSTI ID:5865853
The yield of prompt neutrons from fission fragments has been studied as a function of the mass and combined kinetic energy for spontaneous fission of /sup 252/Cf and thermal-neutron fission of /sup 239/Pu. The masses of the fragments were found from measurements of the kinetic energies of pair fragments by means of a double ionization chamber. The neutrons were recorded by a plastic scintillator 175 mm in diameter and 70 mm thick with use of the time-of-flight method on a 40-cm flight path. The measurements were made for neutron-detector locations at angles 0 and 90/sup 0/ to the line of fragment emission. Analysis of the results permits the conclusion that there are neutrons emitted from the fissioning nucleus before breakup into fragments or from fragments before their complete acceleration in the Coulomb field. Possible mechanisms for emission of such neutrons are discussed.
- OSTI ID:
- 5865853
- Journal Information:
- Sov. J. Nucl. Phys. (Engl. Transl.); (United States), Journal Name: Sov. J. Nucl. Phys. (Engl. Transl.); (United States) Vol. 29:3; ISSN SJNCA
- Country of Publication:
- United States
- Language:
- English
Similar Records
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Measurements of the energy dependence of prompt neutron emission from /sup 233/U, /sup 235/U, /sup 239/Pu, and /sup 241/Pu for E /SUB n/ = 0. 005 to 10 eV relative to emission from spontaneous fission of /sup 252/Cf
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Related Subjects
652026* -- Nuclear Properties & Reactions
A=220 & above
Experimental-- Spontaneous & Induced Fission-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALPHA DECAY RADIOISOTOPES
BARYON REACTIONS
BARYONS
CALIFORNIUM 252
CALIFORNIUM ISOTOPES
DECAY
ELEMENTARY PARTICLES
EVEN-EVEN NUCLEI
FERMIONS
FISSION
FISSION FRAGMENTS
FISSION NEUTRONS
FISSION YIELD
HADRON REACTIONS
HADRONS
HEAVY NUCLEI
ISOTOPES
MASS
NEUTRON REACTIONS
NEUTRONS
NUCLEAR FRAGMENTS
NUCLEAR REACTION YIELD
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEONS
PLUTONIUM 239 TARGET
PROMPT NEUTRONS
RADIOISOTOPES
SPONTANEOUS FISSION
TARGETS
THERMAL FISSION
YEARS LIVING RADIOISOTOPES
YIELDS
A=220 & above
Experimental-- Spontaneous & Induced Fission-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALPHA DECAY RADIOISOTOPES
BARYON REACTIONS
BARYONS
CALIFORNIUM 252
CALIFORNIUM ISOTOPES
DECAY
ELEMENTARY PARTICLES
EVEN-EVEN NUCLEI
FERMIONS
FISSION
FISSION FRAGMENTS
FISSION NEUTRONS
FISSION YIELD
HADRON REACTIONS
HADRONS
HEAVY NUCLEI
ISOTOPES
MASS
NEUTRON REACTIONS
NEUTRONS
NUCLEAR FRAGMENTS
NUCLEAR REACTION YIELD
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEONS
PLUTONIUM 239 TARGET
PROMPT NEUTRONS
RADIOISOTOPES
SPONTANEOUS FISSION
TARGETS
THERMAL FISSION
YEARS LIVING RADIOISOTOPES
YIELDS