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AbstractAbstract
[en] Indications that structure is enhanced for higher bombarding energies led to the study of the 56Fe+56Fe reaction at the Oak Ridge HHIRF using the 14.6 MeV/u 56Fe beam. Emphasis was placed on obtaining unit mass and charge resolution for all projectile-like products. The total kinetic energy spectra of the cobalt products detected at 30, 50 and 70 are shown. Several structures can be tentatively identified. The most striking feature is a strong peak corresponding to a total kinetic energy loss E/sub loss/=16-18 MeV (excitation energy E* of 12-14 MeV). While very prominent in the 50 and 70 spectra, this peak is not seen at 30 and may be interpreted as a proton transfer channel with an angular distribution characteristic of large angular momentum transfer. A second peak can clearly be identified at E/sub loss/ approx. 50 MeV for theta/sub lab/=50; however, a similar structure appears at E/sub loss/ approx. 45 MeV for 70 and there are indications of something at E/sub loss/ approx. 55 MeV for the 30 data. Evaporation calculations show that this is the region of feeding from the first sequential neutron evaporation of 58Co. Several other features are discernable at higher excitation energies which are difficult to understand in the framework of particle evaporation. While the results of the Z=27 energy spectra are encouraging, separation of the 50 data into spectra for individual cobalt isotopes does not greatly enhance the structure. The angular distributions of the four peaks defined by the 70 spectrum are plotted for 20 MeV bins in E/sub loss/. The lowest excitation energy bin, encompassing the E*=15 MeV structure, has an angular distribution which appears to be bell-shaped while the other excitation energy peaks become progressively more forward peaked with increasing excitation energy
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Source
Viola, V.E. Jr. (ed.); Indiana Univ., Bloomington (USA). Dept. of Chemistry; p. 76-79; Apr 1984; p. 76-79; 3. winter workshop on nuclear dynamics; Copper Mountain, CO (USA); 5-9 Mar 1984; Available from NTIS, PC A11/MF A01; 1 as TI84013540
Record Type
Report
Literature Type
Conference; Numerical Data
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