Speaker
Dr
Gaolong Zhang
(BUAA)
Description
G. X. Zhang1, S. P. Hu2, G. L. Zhang1, H. Q. Zhang3, C. J. Lin3, J. Lubian4, W. W. Qu5, Z. Huang1, M. L. Wang1, Y. J. Yao1, X. D. Su1, X. G. Wu3, C. B. Li3, L. Yang3, N. R. Ma3, D. Testov6, D. Mengoni6, J. J. Valiente-Dobon7, A. Goasduff6, D. Bazzazzo6, H. B. Sun2, Y. Zheng3
1 School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China
2 School of Physics and Energy, Shenzhen University, Shenzhen 518060, China
3 China Institute of Atomic Energy, Beijing 102413, China
4 Instituto de Física, Universidade Federal Fluminense, Avenida Litorânea s/n, Gragoatá, Niterói, Rio de Janeiro 24210-340, Brazil
5 State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Soochow University, Suzhou 215123, China
6 Dipartimento di Fisica and INFN, Sezione di Padova, I-35131 Padova, Italy
7 INFN, Laboratori Nazionali di Legnaro, I-35020 Legnaro, Italy
In the reactions induced by exotic and weakly bound nuclei at energies around coulomb barrier, breakup is an important reaction channel. It can provide rich information for nuclear reaction mechanisms and nuclear structure at energies around coulomb barrier. For breakup researches, the elastic scattering and fusion were used. The elastic scattering angular distributions were measured for 50 and 59 MeV 17F radioactive ion beam on a 89Y target. The experimental data were analyzed by means of the optical model with the double-folding Sao Paulo potential for both real and imaginary parts. The theoretical calculations reproduced the experimental data reasonably well. It is shown that the method of the data analysis is correct. Continuum-Discretized Coupled-Channels (CDCC) calculations were performed to consider the breakup coupling effect. It is found that the experimental data show the Coulomb rainbow peak and that the effect of the coupling to the continuum states is not very significant, producing only a small hindrance of the Coulomb rainbow peak and a very small enhancement of the elastic scattering angular distribution at backward angles, suggesting that the multipole response of the neutron halo projectiles is stronger than that of the proton halo systems.
The beam intensities of stable weakly bound nuclei such as 6,7Li and 9Be, which have significant breakup probability, are orders of magnitude higher. Precise fusion measurements induced by these nuclei have already been performed. However, the conclusion of reaction dynamics was not clear and has the contradiction. In order to have a proper understanding of the influence of breakup and transfer of weakly bound projectiles on the fusion process, the 6Li+89Y and 6Li+209Bi experiments were performed on Galileo array in combination with Si-ball EUCLIDES at Legnaro National Laboratory (LNL) in Italy. Using the coincidence by the charged particles and γ-rays, the different reaction channels can be clearly identified. Also the new energy levels of some nuclei were founded, and then the nuclear structure is explored.
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Primary author
Dr
Gaolong Zhang
(BUAA)
