Nuclear reactions studied by quasi-elastic measurements with high precision at backward angles C.J. Lin, H.M. Jia, H.Q. Zhang, F. Yang, X.X. Xu, Z.H. Liu and S.T. Zhang EPJ Web of Conferences, 17 (2011) 05005 Published online: 19 October 2011 DOI: 10.1051/epjconf/20111705005