Compound-Nucleus Decay along the Mass-Asymmetry Coordinate and the Role of the Businaro-Gallone Point
L. G. SobotkaNuclear Science Division, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720M. A. McMahanNuclear Science Division, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720R. J. McDonaldNuclear Science Division, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720C. SignarbieuxNuclear Science Division, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720G.J. WozniakNuclear Science Division, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720M. L. PadgettNuclear Science Division, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720J. H. GuNuclear Science Division, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720Z. H. LiuNuclear Science Division, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720Zepeng YaoNuclear Science Division, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720L. G. MorettoNuclear Science Division, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720
1984en
ABI
Abstract
Fragments with atomic numbers covering the entire range of the mass-asymmetry coordinate ($Z=1$ to $Z=\frac{{Z}_{\mathrm{CN}}}{2}$) were observed from the decay of compound nuclei (CN) produced in reactions of 7.4- and 8.4-MeV/nucleon $^{74}\mathrm{Ge}$, $^{93}\mathrm{Nb}$, and $^{139}\mathrm{La}$ with $^{9}\mathrm{Be}$ and $^{12}\mathrm{C}$. The evolution of the charge distribution with increasing mass of the compound nucleus ($A=83 \mathrm{to} 151$) reflects the topological change in the potential-energy surface associated with crossing the Businaro-Gallone point.
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