TY - JOUR A1 - Otto R.A1 - Mikosch, J.A1 - Trippel, S.A1 - Weidemuller, M.A1 - Wester R.T1 - Nonstandard Behavior of a Negative Ion Reaction at Very Low TemperaturesJF - Physical Review LettersY1 - 2008VL - 101SP - 063201EP - 063201ER -