Evaporation Residue, Fission Cross Sections, and Linear Momentum Transfer for 14N Induced Reactions from 35A to 155A MeV

A. A. Sonzogni, Nuclear Physics Laboratory, University of Washington
A. Elmaani, Nuclear Physics Laboratory, University of Washington
C. Hyde-Wright, Nuclear Physics Laboratory, University of Washington
W. Jiang, Nuclear Physics Laboratory, University of Washington
D. Prindle, Nuclear Physics Laboratory, University of Washington
R. Vandenbosch, Nuclear Physics Laboratory, University of Washington
J. Dinius, National Superconducting Cyclotron Laboratory, Michigan State University
G. Cron, National Superconducting Cyclotron Laboratory, Michigan State University
D. Bowman, National Superconducting Cyclotron Laboratory, Michigan State University
C. K. Gelbke, National Superconducting Cyclotron Laboratory, Michigan State University
W. Hsi, National Superconducting Cyclotron Laboratory, Michigan State University
G. Lynch, National Superconducting Cyclotron Laboratory, Michigan State University
C. Montoya, National Superconducting Cyclotron Laboratory, Michigan State University
Graham F. Peaslee, National Superconducting Cyclotron Laboratory, Michigan State UniversityFollow
C. Schwarz, National Superconducting Cyclotron Laboratory, Michigan State University
M. B. Tsang, National Superconducting Cyclotron Laboratory, Michigan State University
C. Williams, National Superconducting Cyclotron Laboratory, Michigan State University
R. de Souza, Indiana University Cyclotron Facility, Indiana University
D. Fox, Indiana University Cyclotron Facility, Indiana University
T. Moore, Indiana University Cyclotron Facility, Indiana University

Document Type

Article

Publication Date

1-1-1996

Publication Source

Physical Review Letters

Volume Number

53

Issue Number

1

First Page

243

Last Page

248

Publisher

American Physical Society

Abstract

Differential cross sections for evaporation residues and fission fragments for 35A, 100A, 130A and 155A MeV N14 on targets ranging from Sm154 to Au197 have been measured. The angle-integrated cross sections are larger than what might be expected. The fission fragment-fission fragment folding angle correlations for 35A, 100A MeV N14 and 25AMeV O16 on similar targets were also measured. The average linear momentum transfer has been deduced from both the fission angle correlation and from the fore-aft asymmetry of the fission angular distributions in the laboratory system. The data are all consistent with a picture where pre-equilibrium particle emission removes an increasing fraction of the orbital angular momentum as the bombarding energy increases. This allows a large range of partial waves to contribute to formation of a composite nucleus with a finite fission barrier.

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