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Fusion evaporation-residue cross sections for sup 28 Si+ sup 40 Ca at E ( sup 28 Si)=309, 397, and 452 MeV

Journal Article · · Physical Review, C (Nuclear Physics); (United States)
; ; ; ;  [1]; ; ; ; ;  [2];  [3];  [4];  [5];  [6]
  1. Department of Physics, University of Richmond, Richmond, Virginia 23173 (United States)
  2. Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
  3. Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee 37235 (United States)
  4. Division of Educational Programs, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
  5. Department of Physics, University of Kansas, Lawrence, Kansas 66045 (United States)
  6. Laboratory for Nuclear Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
Velocity distributions of mass-identified evaporation residues produced in the {sup 28}Si+{sup 40}Ca reaction have been measured at bombarding energies of 309, 397, and 452 MeV using time-of-flight techniques. These distributions were used to identify evaporation residues and to separate the complete-fusion and incomplete-fusion components. Angular distributions and upper limits for the total evaporation-residue and complete-fusion evaporation-residue cross sections were extracted at all three bombarding energies. The complete-fusion evaporation-residue cross sections and the deduced critical angular momenta are compared with earlier measurements and the predictions of existing models. The ratios of the complete-fusion evaporation-residue cross section to the total evaporation-residue cross section, along with those measured for the {sup 28}Si+{sup 12}C and {sup 28}Si+{sup 28}Si systems at the same energies, support the entrance-channel mass-asymmetry dependence of the incomplete-fusion evaporation-residue process reported earlier.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL
DOE Contract Number:
W-31109-ENG-38
OSTI ID:
7034989
Journal Information:
Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 45:4; ISSN 0556-2813; ISSN PRVCA
Country of Publication:
United States
Language:
English