Scattering of the halo nucleus 11Be from a lead target at 3.5 times the Coulomb barrier energy

Physics Letters B

J.B. Ma¹  Jin Lei²  V. Guimarães²  Z.Y. Sun³  Y.Y. Yang⁴  H.J. Ong⁵  A.M. Moro⁵  H.X. Li⁵  D.X. Wang⁵  Z. Bai⁵  P. Ma⁵  S.Y. Jin⁶  J.S. Yao⁶  F.F. Duan⁶  H.K. Qi⁶  Z.G. Hu⁶  X.H. Zhou⁶  D.Y. Pang⁶  X.X. Sun⁶  X.X. Xu⁶  K. Wang⁶  Y.H. Zhang⁶  Q. Liu⁶  L.J. Sun⁶  S.W. Xu⁶  H.M. Jia⁶  J.S. Wang⁷  Q. Hu⁸  A. Di Pietro⁹  J.L. Lou^1,10  C.J. Lin^1,11  H.S. Xu^1,12  X. Liu^1,13  N.R. Ma^1,14  G. Yang^1,15 

[1] CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China;Corresponding authors.;Instituto Interuniversitario Carlos I de Física Teórica y Computacional (iC1), Apdo. 1065, E-41080 Sevilla, Spain;School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China;School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100080, China;CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China;Departamento de FAMN, Universidad de Sevilla, Apartado 1065, 41080 Sevilla, Spain;INFN-Laboratori Nazionali del Sud, Via S. Sofia 62, I-95123 Catania, Italy;Instituto de Física, Universidade de São Paulo, Rua do Matão, 1371, São Paulo 05508-090, SP, Brazil;Key Laboratory of Radiation Physics and Technology of the Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu 610064, China;School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China;School of Physics and Materials Science, Anhui University, Hefei 230601, China;School of Physics, Beijing Key Laboratory of Advanced Nuclear Materials and Physics, Beihang University, Beijing, 100191, China;School of Physics, State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China;School of Science, Huzhou University, Huzhou 313000, China;

关键词: Elastic scattering;    Breakup reaction;    Breakup coupling effects;    CDCC;    XCDCC;   

DOI  :  

来源: DOAJ

【 摘 要 】

Angular distributions of quasielastic scattering and breakup of the neutron-rich halo nucleus 11Be on a 208Pb target at an incident energy of 140 MeV (about 3.5 times the Coulomb barrier) were measured at HIRFL-RIBLL. A strong suppression of the Coulomb nuclear interference peak is observed in the measured quasielastic scattering angular distribution. The result demonstrates for the first time the persistence of the strong breakup coupling effect reported so far for reaction systems involving neutron-halo nuclei at this relatively high incident energy. The measured quasielastic scattering cross sections are satisfactorily reproduced by continuum discretized coupled channel (CDCC) calculations as well as by the XCDCC calculations where the deformation of the 10Be core is taken into account. The angular and energy distributions of the 10Be fragments could also be well reproduced considering elastic breakup (CDCC and XCDCC) plus nonelastic breakup contributions, with the latter evaluated with the model by Ichimura, Austern and Vincent [1]. The comparison of the 10Be energy distributions with simple kinematical estimates evidence the presence of a significant post-acceleration effect which, in the (X)CDCC frameworks, is accounted for by continuum-continuum couplings.

【 授权许可】

Unknown