Experimental barrier distributions for the fusion of 12C, 16O, 28Si, and 35Cl with 92Zr and coupled-channels analyses

J. O. Newton, C. R. Morton, M. Dasgupta, J. R. Leigh, J. C. Mein, D. J. Hinde, H. Timmers, K. Hagino

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125 Citations (Scopus)

Abstract

Precise excitation functions for the fusion of 12C, 16O, 28Si, and 35Cl on 92Zr were measured for bombarding energies spanning the Coulomb barrier regions. Experimental fusion barrier distributions were derived from these data and compared with the results of realistic coupled-channels calculations, which included couplings to all orders and treated excitation energies correctly. To gain reasonable agreement for the heavier projectiles it was necessary to include double-phonon excitations of the first 2+ and 3- vibrational states in 92Zr. The diffuseness parameter required to fit the high-energy cross sections increases with increasing charge of the projectile and, as found in earlier work, is higher than that required to fit elastic-scattering data. It is suggested that a potential which falls more rapidly at large distance than the Woods-Saxon form might help explain the anomaly.

Original languageEnglish
Article number064608
Pages (from-to)646081-6460812
Number of pages5814732
JournalPhysical Review C - Nuclear Physics
Volume64
Issue number6
DOIs
Publication statusPublished - 2001 Dec
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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