6533b856fe1ef96bd12b253b
RESEARCH PRODUCT
Pre- and post-scission neutron emission in the reaction180Hf(40Ar, fission) atE lab=216 MeV
O. I. OsetrovD. N. VakhtinJuha ÄYstöV.a. RubchenyaI. D. AlkhazovV. G. LyapinG. P. TiourinAndrey KuznetsovWladyslaw Henryk TrzaskaS. V. Khlebnikovsubject
PhysicsNuclear physicsNuclear and High Energy PhysicsCluster decayFissionNeutron emissionNuclear TheoryNeutron cross sectionNuclear fusionNeutronNuclear ExperimentKinetic energyNeutron temperaturedescription
Neutron and fission fragment spectra following the180Hf(40Ar,f) reaction atE lab=216MeV were measured. The following neutron total, pre- and post-scission multiplicities were extracted:M tot =7.2±1.3,M pre =2.7±0.9,M post =4.5±0.9. The average temperature parameters of the neutron spectra areT pre=(1.63±0.16) MeV andT post=(1.14±0.26)MeV. The mean total kinetic energy of the fission fragments is TKE=(166±10) MeV and the measured width is σTKE=17.3MeV. The width of the fragment mass distribution is σ A =18.3u. The same reaction was analyzed using a modified statistical code which includes nuclear dissipation effects and particle and γ-ray emission in the equilibrium compound nucleus state and saddle-to-scission transition. The extracted value of nuclear friction coefficient indicates over-damped large-scale fission motion. The obtained total fission time τfiss=9·10−20s is in agreement with other existing data.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1996-12-01 | Zeitschrift für Physik A Hadrons and Nuclei |