Sensitivity to multi-phonon excitations in heavy-ion fusion reactions

H. Esbensen
Phys. Rev. C 72, 054607 – Published 23 November 2005

Abstract

Measured cross sections for the fusion of Ni64 with Ni64, Ge74, and Mo100 targets are analyzed in a coupled-channels approach. The data for the Ni64 target above 0.1 mb are reproduced by including couplings to the low-lying 2+ and 3 states and the mutual and two-phonon excitations of these states. The calculations become more challenging as the fusing nuclei become softer and heavier, and excitations to multi-phonon states start to play an increasingly important role. Thus it is necessary to include up to four-phonon excitations to reproduce the data for the Ni64+Ge74 system. Similar calculations for Ni64+Mo100, and also for the symmetric Ge74+Ge74 system, show large discrepancies with the data. Possible ways to improve the calculations are discussed.

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  • Received 2 September 2005

DOI:https://doi.org/10.1103/PhysRevC.72.054607

©2005 American Physical Society

Authors & Affiliations

H. Esbensen

  • Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA

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Issue

Vol. 72, Iss. 5 — November 2005

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