Radiative transition rates and collision strengths for Si II M. A. Bautista, P. Quinet, P. Palmeri, N. R. Badnell, J. Dunn and N. Arav A&A, 508 3 (2009) 1527-1537 Published online: 04 November 2009 DOI: 10.1051/0004-6361/200913179