Covariance Matrix of a Double-Differential Doppler-Broadened Elastic Scattering Cross Section G. Arbanas, B. Becker, R. Dagan, M.E. Dunn, N.M. Larson, L.C. Leal and M.L. Williams EPJ Web of Conferences, 27 (2012) 00006 Published online: 30 May 2012 DOI: 10.1051/epjconf/20122700006