6533b874fe1ef96bd12d63b0
RESEARCH PRODUCT
Production of neutron-rich isotopes in fission of uranium induced by neutrons of 20 MeV average energy
P. JardinJussi HuikariAri JokinenJuha ÄYstöA. NieminenC. LauJean VervierM. G. Saint-laurentJ. C. WangV. A. RubchenyaPeter DendoovenHeikki PenttiläKari PerajarviL. LebretonD. VakhtinV. KolhinenWladyslaw Henryk TrzaskaA.c. MuellerAntonio VillariG. LhersonneauS. NummelaZ. RadivojevicG. Canchelsubject
PhysicsNuclear and High Energy PhysicsCold fissionIsotopes of uranium010308 nuclear & particles physicsNeutron emissionIsotopes of samariumNuclear TheoryFission product yield[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]01 natural sciences7. Clean energyFast fissionNuclear physicsUranium-2380103 physical sciencesPhysics::Accelerator PhysicsNuclear Experiment010306 general physicsLong-lived fission productdescription
In the context of a parameter study conducted by several laboratories for future European radioactive beam facilities based on fast-neutron induced fission, in particular for the SPIRAL-II project at GANIL, we have measured the yields of neutron-rich isotopes in the mass range of 88 to 144. These nuclei were obtained as fission products of natural uranium bombarded by neutrons of 20 MeV average energy emitted by a thick carbon target irradiated by 50 MeV deuterons. Yields have been measured using on-line mass separation with the ion-guide method. Compared with proton-induced fission at 25 MeV the magnitude of cross-sections, except for the symmetric region, is similar. Z-distributions of isobars have the same width, 0.7 charge units, but their maxima are shifted by about 0.8 charge units, favouring production of the neutron-richer isobars. Our data allow calculations of absolute cross-sections for fission of natural uranium induced by neutrons of about 20 MeV.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2000-12-01 |