Intermediate mass fragment emission in the 161-MeV p+Ag reaction
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Spectra, angular distributions, and cross sections have been measured for Z=3 12 fragments produced in the reaction of 161-MeV protons with a silver target. Nonequilibrium mechanisms dominate the fragment yields at forward angles and for low-Z ejectiles. Equilibrated emission is primarily responsible for fragments observed at backward angles, an effect which grows in importance with increasing fragment Z value. A power-law fit to the elemental cross section distributions yields an exponent =4.7, significantly larger than observed for higher-energy protons. These data are compared with the predictions of statistical decay, accreting source, and preequilibrium calculations. © 1990 The American Physical Society.
author list (cited authors)
Yennello, S. J., Kwiatkowski, K., Rose, S., Woo, L. W., Zhou, S. H., & Viola, V. E.