Neutron-excess dependence of fusion-Ni+Sn

W. S. Freeman, H. Ernst, D. F. Geesaman, W. Henning, T. J. Humanic, W. Kühn, G. Rosner, J. P. Schiffer, B. Zeidman, F. W. Prosser

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Abstract

Excitation functions (Elab=235-320 MeV) for producing nuclei close to the compound system (evaporation residues) were measured for Ni58,64+ Sn112-124, corresponding to a 20% variation in the compound-nucleus neutron number. A dramatic, order-of-magnitude increase was observed in the maximum cross section as a function of the compound-nucleus neutron neutron excess. The subbarrier energy dependence of the cross sections is well described by an optical-model calculation, but not by the frequently used parabolic approximation.

Original languageEnglish (US)
Pages (from-to)1563-1566
Number of pages4
JournalPhysical Review Letters
Volume50
Issue number20
DOIs
StatePublished - 1983
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Freeman, W. S., Ernst, H., Geesaman, D. F., Henning, W., Humanic, T. J., Kühn, W., Rosner, G., Schiffer, J. P., Zeidman, B., & Prosser, F. W. (1983). Neutron-excess dependence of fusion-Ni+Sn. Physical Review Letters, 50(20), 1563-1566. https://doi.org/10.1103/PhysRevLett.50.1563