Prompt fission neutron spectra and fragment characteristics for spontaneous fission of even-numbered plutonium isotopes

Journal Article · Tue Oct 01 04:00:00 EDT 1991 · Nuclear Science and Engineering; (United States)

OSTI ID:5546766

Maerten, H; Ruben, A; Seeliger, D ^[1]

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1. Technische Univ. Dresden, Mommsenstrasse 13, O-8027 Dresden (DE)

This paper reports on a phenomenological scission point model including temperature-dependent shell effects that is used to solve the energy partition problem as a function of mass asymmetry (A{sub 1}/A{sub 2}) for plutonium fission. Relevant fragment data such as average excitation energy {bar E}*(A) and total kinetic energy {ovr TKE}(A{sub 1}/A{sub 2}) are used as the basis for applying a temperature distribution model based on the Modland-Nix theory that includes the full mass number dependence of spectra, a realistic temperature distribution of fragments, a modified center-of-mass (CMS) spectrum ansatz, CMS anisotropy of neutron emission, and competition of neutron and gamma-ray emission. The new model describes neutron multiplicity energy, and angular distribution of prompt fission neutrons. Calculated data for {sup 238}Pu, {sup 240}Pu, and {sup 242}Pu spontaneous fission are presented and discussed in comparison with experimental data.

• OSTI ID: 5546766
• Journal Information: Nuclear Science and Engineering; (United States), Journal Name: Nuclear Science and Engineering; (United States) Vol. 109:2; ISSN 0029-5639; ISSN NSENA
• Country of Publication: United States
• Language: English

Related Subjects

665100* -- Nuclear Techniques in Condensed Matter Physics -- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALPHA DECAY RADIOISOTOPES
ASYMMETRY
BARYONS
CENTER-OF-MASS SYSTEM
DECAY
ELEMENTARY PARTICLES
ENERGY
EVEN-EVEN NUCLEI
FERMIONS
FISSION
FISSION NEUTRONS
FRAGMENTATION
HADRONS
HEAVY ION DECAY RADIOISOTOPES
HEAVY NUCLEI
ISOTOPES
KINETIC ENERGY
MASS NUMBER
MATHEMATICAL MODELS
MODIFICATIONS
MULTIPLICITY
NEUTRON SPECTRA
NEUTRONS
NUCLEAR DECAY
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
PLUTONIUM 238
PLUTONIUM 240
PLUTONIUM 242
PLUTONIUM ISOTOPES
PROMPT NEUTRONS
RADIOISOTOPES
SCISSION-POINT MODEL
SHELL MODELS
SILICON 32 DECAY RADIOISOTOPES
SPECTRA
SPONTANEOUS FISSION
SPONTANEOUS FISSION RADIOISOTOPES
TEMPERATURE DISTRIBUTION
YEARS LIVING RADIOISOT
YEARS LIVING RADIOISOTOPES