Mass-Asymmetric Barriers from Excitation Functions for Complex-Fragment Emission
M. A. McMahanNuclear Science Division, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720L. G. MorettoNuclear Science Division, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720M. L. PadgettNuclear Science Division, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720G.J. WozniakNuclear Science Division, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720L. G. SobotkaNuclear Science Division, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720Munshi G. MustafaNuclear Science Division, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720
1985en
ABI
Abstract
The conditional saddle-point heights (conditional barriers) that preside over the emission of complex fragments ($Z=2\ensuremath{-}11$) from compound nuclei have been obtained from the excitation functions of individual fragments in the reaction $^{3}\mathrm{He}$+$^{\mathrm{nat}}\mathrm{Ag}$. The magnitudes of the barriers and their dependence on mass asymmetry may be used to verify important features of the potential-energy surface including shell effects at the conditional saddle and to verify the validity of the liquid-drop model and recent refinements such as finite-range effects and surface diffuseness.
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