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Fusion and nonfusion processes in reactions induced by 10--100-MeV /sup 6/Li ions with Fe targets

Journal Article · · Phys. Rev., C; (United States)
; ; ;
Excitation functions and projected recoil ranges for radioactive nuclei produced in the /sup 6/Li bombardment of /sup 54/Fe an /sup 56/Fe targets over 10 to 100 MeV energy range have been measured using the activation technique. At 55 and 85 MeV differential ranges have also been measured for the /sup 56/Fe target. Using the in-beam gamma-ray technique production cross sections for many residual nuclei were measured for the /sup 6/Li + /sup 56/Fe system for a /sup 6/Li energy range of 55 to 94 MeV. Close to 90% of the optical model reaction cross section is observed over the entire energy range. About 80% of the observed cross section corresponds to statistical evaporation of the compound nucleus. Above about 30 MeV /sup 6/Li energy /sup 56/Fe(/sup 6/Li,..cap alpha..)/sup 58/Co* transfer process can explain the observed behavior of recoil ranges. It contributes about 300 mb to the production of various nuclei reached through evaporation decay of /sup 58/Co*. Pre-equilibrium nucleon emission appears to be noticeable above 60 MeV and contributes 100 mb to the production process at 80 MeV. A reasonable account of the observed cross section for various product nuclei is given by the predictions of the fusion-evaporation model. In its fusion characteristics /sup 6/Li projectile appears to behave very much like other light heavy ions.
Research Organization:
Indiana University Cyclotron Facility, Bloomington, Indiana 47401
OSTI ID:
6308074
Journal Information:
Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 19:3; ISSN PRVCA
Country of Publication:
United States
Language:
English

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Related Subjects

651525* -- Nuclear Properties & Reactions
A=39-58
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA SPECTRA
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CHARGED-PARTICLE REACTIONS
COBALT 58
COBALT ISOTOPES
CROSS SECTIONS
DAYS LIVING RADIOISOTOPES
ELECTRON CAPTURE RADIOISOTOPES
ENERGY RANGE
EVAPORATION MODEL
FUSION REACTIONS
GAMMA SPECTRA
HEAVY ION REACTIONS
HOURS LIVING RADIOISOTOPES
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
IRON 54 TARGET
IRON 56 TARGET
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LITHIUM 6 REACTIONS
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 10-100
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
ODD-ODD NUCLEI
OPTICAL MODELS
PRECOMPOUND-NUCLEUS EMISSION
RADIOISOTOPES
SPECTRA
TARGETS