Argon K-shell and bound-free emission from OMEGA direct-drive implosion cores - Florido, R.; Mancini, R.C.; Nagayama, T.; Tommasini, R.; Delettrez, J.A.; Regan, S.P.; Smalyuk, V.A.; Rodríguez, R.; Gil, J.M. (High Energy Density Physics, 2010)