Dissociative recombination of H+(H2O)3 and D+(D2O)3 water cluster ions with electrons: Cross sections and branching ratios
Journal article, 2007

Dissociative recombination (DR) of the water cluster ions H+(H2O)3 and D+(D2O)3 with electrons has been studied at the heavy-ion storage ring CRYRING (Manne Siegbahn Laboratory, Stockholm University). For the first time, absolute DR cross sections have been measured for H+(H2O)3 in the energy range of 0.001–0.8 eV, and relative cross sections have been measured for D+(D2O)3 in the energy range of 0.001–1.0 eV. The DR cross sections for H+(H2O)3 are larger than previously observed for H+(H2O)n (n=1,2), which is in agreement with the previously observed trend indicating that the DR rate coefficient increases with size of the water cluster ion. Branching ratios have been determined for the dominating product channels. Dissociative recombination of H+(H2O)3 mainly results in the formation of 3H2O+H (probability of 0.95±0.05) and with a possible minor channel resulting in 2H2O+OH+H2 (0.05±0.05). The dominating channels for DR of D+(D2O)3 are 3D2O+D (0.88±0.03) and 2D2O+OD+D2 (0.09±0.02). The branching ratios are comparable to earlier DR results for H+(H2O)2 and D+(D2O)2, which gave 2X2O+X (X=H,D) with a probability of over 0.9.

Author

Jenny Öjekull

University of Gothenburg

Patrik U Andersson

University of Gothenburg

Mats B Någård

University of Gothenburg

Jan B. C. Pettersson

University of Gothenburg

Nikola Markovic

Chalmers, Chemical and Biological Engineering, Physical Chemistry

A M Derkatch

Stockholm University

A Neau

Stockholm University

A al-Khalili

Stockholm University

S Rosén

Stockholm University

M Larsson

Stockholm University

J Semaniak

Akademia Swietokrzyska im. Jana Kochanowskiego w Kielcach

H Danared

Manne Siegbahn Laboratory

A Källberg

Manne Siegbahn Laboratory

F Österdahl

Manne Siegbahn Laboratory

M af Ugglas

Manne Siegbahn Laboratory

Journal of Chemical Physics

0021-9606 (ISSN) 1089-7690 (eISSN)

Vol. 127 19 194301- 194309

Subject Categories

Physical Chemistry

DOI

10.1063/1.2803901

More information

Latest update

3/1/2018 7