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Dissociative Recombination of CD3OD2+

Published online by Cambridge University Press:  21 March 2006

W. D. Geppert ,
F. Hellberg ,
F. Österdahl ,
J. Semaniak ,
T. J. Millar ,
H. Roberts ,
R. D. Thomas ,
M. Hamberg ,
M. af Ugglas  and
A. Ehlerding
...Show all authors
W. D. Geppert
Affiliation:
Molecular Physics Division, Department of Physics, Stockholm University AlbaNova, SE 10691, Stockholm, Sweden, e-mail: wgeppert@physto.se
F. Hellberg
Affiliation:
Molecular Physics Division, Department of Physics, Stockholm University AlbaNova, SE 10691, Stockholm, Sweden, e-mail: wgeppert@physto.se
F. Österdahl
Affiliation:
Institute of Physics, Royal Institute of Technology, AlbaNova, SE 10691, Stockholm, Sweden
J. Semaniak
Affiliation:
Świȩtokrzyska Akademy, ul. Świȩtokrzyska 15, Pl-245406 Kielce, Poland
T. J. Millar
Affiliation:
University of Manchester, Manchester M13 9PL, United Kingdom
H. Roberts
Affiliation:
University of Manchester, Manchester M13 9PL, United Kingdom
R. D. Thomas
Affiliation:
Molecular Physics Division, Department of Physics, Stockholm University AlbaNova, SE 10691, Stockholm, Sweden, e-mail: wgeppert@physto.se
M. Hamberg
Affiliation:
Molecular Physics Division, Department of Physics, Stockholm University AlbaNova, SE 10691, Stockholm, Sweden, e-mail: wgeppert@physto.se
M. af Ugglas
Affiliation:
Molecular Physics Division, Department of Physics, Stockholm University AlbaNova, SE 10691, Stockholm, Sweden, e-mail: wgeppert@physto.se
A. Ehlerding
Affiliation:
Molecular Physics Division, Department of Physics, Stockholm University AlbaNova, SE 10691, Stockholm, Sweden, e-mail: wgeppert@physto.se
V. Zhaunerchyk
Affiliation:
Molecular Physics Division, Department of Physics, Stockholm University AlbaNova, SE 10691, Stockholm, Sweden, e-mail: wgeppert@physto.se
M. Kaminska
Affiliation:
Świȩtokrzyska Akademy, ul. Świȩtokrzyska 15, Pl-245406 Kielce, Poland
M. Larsson
Affiliation:
Molecular Physics Division, Department of Physics, Stockholm University AlbaNova, SE 10691, Stockholm, Sweden, e-mail: wgeppert@physto.se
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Abstract

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The branching ratios of the different reaction pathways and the overall rate of the dissociative recombination of CD$_{3}$OD$_{2}^{+}$ were measured at the CRYRING storage ring located at the Manne Siegbahn Laboratory in Stockholm, Sweden. A preliminary analysis of the data yielded that formation of methanol accounts for only 6 $\pm$ 2% of the total reaction rate. Largely, dissociative recombination of CD$_{3}$OD$_{2}^{+}$ involves fragmentation of the C–O bond, the major process being the three-body break-up forming CD$_{3}$, OD and D (branching ratio 0.59). A non-negligible formation of interstellar methanol by the previously proposed mechanism is therefore very unlikely.

Keywords

ISM: molecules — methods: laboratory — molecular processes