Speaker
Dr
Yanyun Yang
(Institute of Modern Physics, Chinese Academy of Sciences)
Description
Elastic scattering, a simple process on peripheral reactions, is one of the ideal tools to study the weakly bound nuclei in order to investigate their unusual features [1,2]. A lot of the elastic scattering experiments have been performed for the weakly bound nuclei, such as $^{6}$He [3], $^{11}$Be [4] and $^{11}$Li [5]on heavy targets at the energies around the Coulomb barriers. However, the elastic-scattering data for the proton-halo nuclei above the Coulomb barrier are still scarce. A set of experimental method has been established to measure the differential cross-sections of the elastic scattering on the Radioactive Ion Beam Line in Lanzhou(RIBLL) [6] at the Heavy-Ion Research Facility in Lanzhou(HIRFL) [7]}. Special care was taken to overcome the disadvantages of the broad beam profiles and limited intensities of the radioactive ion beams [8]. The method has been successfully applied to carry out the elastic scattering angular distributions of the proton-rich nuclei $^{8}$B and $^{9,10,11}$C on $^{nat}$Pb target at the energies around 3 times of the Coulomb barrier [9,10].
The experimental data are analyzed using the optical model using a single-folding-type potential and the continuum discretized coupled-channels (CDCC) method. The CDCC calculation describes the angular distribution of $^{8}$B very well. The calculation without taking into account the breakup channel coupling does not differ from that of the full CDCC calculation. That is, the effect of breakup-channel coupling on the elastic scattering is small for $^{8}$B at the energy well above the Coulomb barrier, in contrast to what was observed in the elastic scattering of neutron-rich nuclei on heavy targets at the energies around the Coulomb barrier. The experimental data of $^{9,10,11}$C are analyzed using the optical model with a systematic nucleus-nucleus potential[11]. The experimental data are well described by the optical model calculations.
References:
[1] N. Keeley et al., Prog. Part. Nucl. Phys. 63 (2009) 396.
[2] L. F. Canto et al., Phys. Rep. 596(2015) 1.
[3] L. Acosta et al., Phys. Rev. C 84, 044604 (2011).
[4] A. Di Pietro et al., Phys. Rev. Lett. 105, 022701 (2010).
[5] M. Cubero et al., Phys. Rev. Lett. 109(1997) 262701.
[6] Z. Sun et al., Nucl. Instr. and Meth. A 503 (2003) 496
[7] J. W. Xia et al., Nucl. Instr. and Meth. A 488 (2002) 11
[8] Y. Y. Yang et al., Nucl. Instr. and Meth. A 701 (2013) 1
[9] Y. Y. Yang et al., Phys. Rev. C 87 (2013) 044613
[10] Y. Y. Yang et al., Phys. Rev. C 90 (2014) 044606
[11] Y. P. Xu, Phys. Rev. C 87 (2013) 044605
Primary author
Dr
Yanyun Yang
(Institute of Modern Physics, Chinese Academy of Sciences)
Co-authors
Dr
Danyang Pang
(School of Physics and Nuclear Energy Engineering, Beihang University)
Prof.
Jiansong Wang
(Institute of Modern Physics, Chinese Academy of Sciences)
Mr
Junbing Ma
(Institute of Modern Physics, Chinese Academy of Sciences)
Mr
Peng Ma
(Institute of Modern Physics, Chinese Academy of Sciences)
Prof.
Qi Wang
(Institute of Modern Physics, Chinese Academy of Sciences)
Dr
Shilun Jin
(Institute of Modern Physics, Chinese Academy of Sciences)
