Opacity measurements of a hot iron plasma using an x-ray laser - Edwards, M H; Whittaker, D; Mistry, P; Booth, N; Pert, G J; Tallents, G J; Rus, B; Mocek, T; Koslová, M; McKenna, C; Delserieys, A; Lewis, C L S; et al. (Physical review letters, 2006)