Vol. 53, No. 3
September 1999
pp. 513-520

Exploiting barrier distributions to investigate breakup effects in the fusion of ⁹Be +²⁰⁸Pb

M DASGUPTA¹, D J HINDE¹,R D BUTT¹, A C BERRIMAN¹,C R MORTON¹,J O NEWTON¹ and K HAGINO²

1Department of Nuclear Physics, Research School of Physical Sciences and Engineering, Australian National University, Canberra, ACT 0200, Australia
² Institute for Nuclear Theory, Department of Physics, University of Washington, Seattle, WA98915, USA

Abstract.

The availability of precisely measured fusion excitation functions have allowed the de-termination of experimental fusion barrier distributions. This concept is utilised in ⁹ Be + ²⁰⁸ Pb reaction, to reliably predict the expected complete fusion cross-sections. However, the measured cross-sections are found to be only 68% of those predicted. The large cross-sections observed for incomplete fusion products support the interpretation that this suppression of fusion is caused by ⁹Be breaking up into charged fragments before reaching the fusion barrier.

Keywords. Fusion; barrier distribution; breakup; incomplete fusion.

PACS No. 25.70.Jj

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