Extreme-ultraviolet emissivity from Xe8+ to Xe12+ by using a detailed line-by-line method J. Zeng, C. Gao and J. Yuan Eur. Phys. J. D, 60 2 (2010) 309-316 Published online: 27 July 2010 DOI: 10.1140/epjd/e2010-00192-6