The European Physical Journal A

ISSN: 1434-6001 (printed version)
ISSN: 1434-601X (electronic version)

Table of Contents

Abstract Volume 2 Issue 3 (1998) pp 227-231

short notes: Fusion around the barrier in ^11,9Be + ²⁰⁹Bi

C. Signorini (1), Z.H. Liu (2)(8), A. Yoshida (3), T. Fukuda (4) (*), Z.C. Li (1)(8), K.E.G. Löbner (5), L. Müller (1), Y.H. Pu (3) (**), K. Rudolph (5), F. Soramel (6), C. Zotti (5), J.L. Sida (7)

(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

Abstract: The ⁹Be + ²⁰⁹Bi fusion cross sections were measured in the range 37.5 MeV \leq E_lab \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

(*) Correspondence to: Present addresses: KEK, Oho, Tsukuba, Ibaraki 305, Japan
(**) Present adresses: Mitsubishi Electric Co., Tsukaguchi, Amagasaki, Hyogo 661, Japan
Communicated by B. Povh

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Online publication: July 16, 1998
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