12168-29-5Relevant academic research and scientific papers
Dissociative recombination of H+ (H2 O)3 and D+ (D2 O)3 water cluster ions with electrons: Cross sections and branching ratios
Oejekull, J.,Andersson, P. U.,Naagaard, M. B.,Pettersson, J. B. C.,Markovic, N.,et al.
, p. 1 - 8 (2009/12/02)
Dissociative recombination (DR) of the water cluster ions H+ (H2 O)3 andD+ (D2 O)3 with electrons has been studied at the heavy-ion storage rin g CRYRING (Manne Siegbahn Laboratory, Stockholm University). For the first time, absolute DR cross sections have been measured for H+ (H2 O)3 inthe energy range of 0.001-0.8 eV, and relative cross sections have been measured for D+ (D2 O)3 in the energy range of 0.001-1.0 eV. The DR cro ss sections for H+ (H2 O)3 are larger than previously observed for H+ (H2 O)n (n=1,2), which is in agreement with the previously observed trend indicating that the DR rate coefficient increases with size of the watercluster ion. Branching ratios have been determined for the dominating p roduct channels. Dissociative recombination of H+ (H2 O)3 mainly resultsin the formation of 3 H2 O+H (probability of 0.95±0.05) and with a possible minor channel resulting in 2 H2 O+OH+ H2 (0.05±0.05). The dominating channels for DR of D+ (D2 O)3 are 3 D2 O+D (0.88± 0.03) and 2 D2 O+OD+ D2 (0.09±0.02). The branching ratios are comparable to earlier DR results for H+ (H2 O)2 and D+ (D2 O)2, which gave 2 X2 O+X (X=H,D) with a probability of over 0.9.
