2018 Impact factor 2.481
Hadrons and Nuclei
Eur. Phys. J. A 2, 227-231

Short note

Fusion around the barrier in 11,9Be + 209Bi

C. Signorini1 - Z.H. Liu2,8 - A. Yoshida3 - T. Fukuda4 - Z.C. Li1,8 - K.E.G. Löbner5 - L. Müller1 - Y.H. Pu3 - K. Rudolph5 - F. Soramel6 - C. Zotti5 - J.L. Sida7

1 Physics Department of University and INFN, via Marzolo 8, I-35131 Padova, Italy
2 INFN, Legnaro National Laboratories, Legnaro, Padova, Italy
3 RIKEN, Hirosawa, Wako, Saitama, 351-01 Japan
4 INS, The University of Tokyo, Midori-cho, Tanashi, 188 Tokyo, Japan
5 Sektion Physik, Ludwigs-Maximilian University, D-85748 Garching, Germany
6 Physics Department of University and INFN, via delle Scienze 208, I-33100 Udine, Italy
7 CEA/DSN/DAPNIA Saclay, F-91191 Gif sur Yvette, France
8 China Institute of Atomic Energy, P.O.Box 275(10), Beijing 102413, P.R.of China

Received: 2 April 1998 Communicated by B. Povh

Abstract
The 9Be + 209Bi fusion cross sections were measured in the range 37.5 MeV $\leq$ Elab $\leq$ 45.0 MeV at the Munich Tandem via the observation of ground state $\alpha$-decay of the evaporation residues. Fusion cross sections of 209Bi with the "halo" 11Be unstable projectile in the region around the Coulomb barrier were deduced from an experiment done with the same technique at the RIKEN Ring Cyclotron. Above the Coulomb barrier the 11Be cross sections are larger than the 9Be ones in agreement with theoretical predictions based on the larger 11Be halo radius. Also below the barrier these theories foresee the same behavior in disagreement with the experimental results, since the two cross sections are rather similar.

PACS
25.70.Jj Fusion and fusion-fission reactions


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