Sub-barrier backward quasielastic scattering: A probe of the hexadecapole deformation H.Q. Zhang, C.J. Lin, H.M. Jia, L. Yang, X.X. Xu, F. Yang, Z.D. Wu, Z.H. Liu, N.R. Ma, L.J. Sun and D.X. Wang EPJ Web of Conferences, 117 (2016) 04010 Published online: 11 May 2016 DOI: 10.1051/epjconf/201611704010