“…An impressive number of reports deal with ions and radicals, most of them cations, whose investigations were frequently carried out employing ion traps including 22-pole traps from Cologne. The contributions deal with the diatomics NO + [68] and NO [83] and with the early universe molecule candidate H 2 He + [57]. Three manuscripts address one of Stephan's favorite molecules, H + 3 : one involving recombination [71], one proposing how to access very highly excited rovibrational levels [84], and one on forbidden rotational transitions and their importance to astrophysics [88].…”