ISSN:
1434-601X
Keywords:
PACS. 24.75.+i General properties of fission – 25.85.Ec Neutron-induced fisssion – 25.85.Ge Charged-particle induced fission
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract: 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.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s100500070023
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