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Projectile fission in /sup 58/Ni-induced reactions at 15. 3 MeV/u.

Author
Awes, T. C.
Published
United States : [publisher not identified], 1984
Springfield, Va.: National Technical Information Service, [approximately 1984]
Physical Description
microfiche : negative ; 11 x 15 cm
Additional Creators
Ferguson, R. L., Novotny, R., Obenshain, F. E., Plasil, F., Rauch, V., Sann, H., and Young, G. R.

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Summary
The present study was intended as a search for sequential fission of projectilelike fragments for reactions induced by intermediate-mass heavy ions. The objective was to determine the fission probability as a function of excitation energy or energy loss in the first step of the reaction. The inclusive charge distributions measured with the large-area ionization chamber for reactions of /sup 58/Ni + /sup 58/Ni at 15.3 MeV/u were found to be dominated by products with Z < 28. Very little yield was observed for nuclei with charges greater than that of the projectile. It has been shown that most of the shift toward lighter products is consistent with the effects of equilibrium evaporation. At the largest calculated energy losses, the inclusive charge distributions were found to be slightly asymmetric due to an increasing component of fragments with half or less of the projectile charge. These light fragments were observed to have much broader angular distributions than the corresponding heavier fragments of the same energy loss. These observations from the inclusive measurements already suggest the occurrence of sequential fission of the projectilelike fragment. More conclusive evidence is obtained from coincidence measurements. Results are presented. (WHK)
Report Numbers
DE84011651; CONF-8403101-7
Other Subject(s)
Collection
NTIS collection.
Note
DOE contract number: AC05-84OR21400
OSTI Identifier 6896531
Research organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States).
View MARC record | catkey: 47340622