Compound-Nucleus Decay along the Mass-Asymmetry Coordinate and the Role of the Businaro-Gallone Point

L. G. Sobotka; M. A. McMahan; R. J. McDonald; C. Signarbieux; G. J. Wozniak; M. L. Padgett; J. H. Gu; Z. H. Liu; Z. Q. Yao; L. G. Moretto

doi:10.1103/PhysRevLett.53.2004

Compound-Nucleus Decay along the Mass-Asymmetry Coordinate and the Role of the Businaro-Gallone Point

L. G. Sobotka, M. A. McMahan, R. J. McDonald, C. Signarbieux, G. J. Wozniak, M. L. Padgett, J. H. Gu, Z. H. Liu, Z. Q. Yao, and L. G. Moretto

Phys. Rev. Lett. 53, 2004 – Published 19 November 1984

Abstract

Fragments with atomic numbers covering the entire range of the mass-asymmetry coordinate ( $Z = 1$ to $Z = \frac{Z_{CN}}{2}$ ) were observed from the decay of compound nuclei (CN) produced in reactions of 7.4- and 8.4-MeV/nucleon ${}^{74}{Ge}$ , ${}^{93}{Nb}$ , and ${}^{139}{La}$ with ${}^{9}{Be}$ and ${}^{12}C$ . The evolution of the charge distribution with increasing mass of the compound nucleus ( $A = 83 to 151$ ) reflects the topological change in the potential-energy surface associated with crossing the Businaro-Gallone point.

Received 23 July 1984

DOI:https://doi.org/10.1103/PhysRevLett.53.2004

Authors & Affiliations

L. G. Sobotka^*, M. A. McMahan, R. J. McDonald, C. Signarbieux^†, G. J. Wozniak, M. L. Padgett, J. H. Gu^‡, Z. H. Liu^§, Z. Q. Yao^‡, and L. G. Moretto

Nuclear Science Division, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720

^*Permanent address: Chemistry Department, Washington University, St. Louis, Mo. 63130.
^†Permanent address: Centre d'Etudes Nucléaires de Saclay, F-91191 Gif-sur-Yvette Cedex, France.
^‡Permanent address: Shanghai Institute of Nuclear Research, Shanghai, China.
^§Permanent address: Institute of Atomic Energy, Beijing, China.