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00925njm 22002777a 4500 dc Gigosos, M. A. author González, M. Á. author Konjević, N. author 2006 We report results of the Stark broadening calculations for Sr+ and Ba+ resonance lines in ultra- cold plasmas using semiempirical formulas and numerical computer simulation technique. The simulation results show that strong collisions dominate Stark broadening at very low electron temperatures and weak collision approximation used recently by Vrinceanu et al. cannot be applied in this temperature region. Consequently, the temperature trend of Stark widths and shifts changes from 1/ T successfully used at elevated temperatures to an increasing trend with temperature, which is characteristic for strong collisions at low temperature. The European Physical Journal D-Atomic, Molecular, Optical and Plasma Physics, 2006, vol. 40, n.1, p. 57-63. 1434-6060 https://uvadoc.uva.es/handle/10324/84165 10.1140/epjd/e2006-00169-0 57 1 63 The European Physical Journal D 40 1434-6079 On the Stark broadening of Sr+ and Ba+ resonance lines in ultracold neutral plasmas