Excitation functions for complex fragment emission in the E/A =20–100 MeV N14+natAg, Au197 reactions

J. L. Wile, D. E. Fields, K. Kwiatkowski, S. J. Yennello, K. B. Morley, E. Renshaw, V. E. Viola, C. K. Gelbke, W. G. Lynch, N. Carlin, H. M. Xu, W. G. Gong, M. B. Tsang, J. Pochodzalla, R. T. deSouza, D. J. Fields, and Sam M. Austin
Phys. Rev. C 45, 2300 – Published 1 May 1992
PDFExport Citation

Abstract

Excitation functions have been measured for complex fragments with atomic number Z=3–15 emitted in collisions of E/A=20–100 MeV N14 ions with targets of Agnat and Au197. The results are analyzed in terms of a three-source model which includes: projectilelike fragments from peripheral processes, nonequilibrium emission, and statistical decay of fully equilibrated compound nuclei. Nonequilibrium emission of complex fragments is found to increase rapidly relative to equilibrium emission up to E/A≊60 MeV and then remain approximately constant thereafter. Evidence for enhanced production of heavier intermediate-mass fragments is found in the data for reactions with the Agnat target at energies above E/A≊60 MeV. Fit parameters for the equilibrium and nonequilibrium sources are examined. In particular, it is observed that the temperature parameter for nonequilibrium emission of complex fragments is independent of bombarding energy up to E/A=100 MeV.

  • Received 16 December 1991

DOI:https://doi.org/10.1103/PhysRevC.45.2300

©1992 American Physical Society

Authors & Affiliations

J. L. Wile, D. E. Fields, K. Kwiatkowski, S. J. Yennello, K. B. Morley, E. Renshaw, and V. E. Viola

  • Departments of Chemistry and Physics and Indiana University Cyclotron Facility, Indiana University, Bloomington, Indiana 47405

C. K. Gelbke, W. G. Lynch, N. Carlin, H. M. Xu, W. G. Gong, M. B. Tsang, J. Pochodzalla, R. T. deSouza, D. J. Fields, and Sam M. Austin

  • Department of Physics and National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824

References (Subscription Required)

Click to Expand
Issue

Vol. 45, Iss. 5 — May 1992

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review C

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×