Dissociative recombination of ammonia clusters studied by storage ring experiments

Journal Article · Tue Nov 21 04:00:00 EST 2006 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.2387174· OSTI ID:20864344

Oejekull, J; Andersson, P U; Naagaard, M B; Pettersson, J B. C.; Neau, A; Rosen, S; Thomas, R D; Larsson, M; Semaniak, J; Oesterdahl, F; Danared, H; Kaellberg, A; Ugglas, M af ^[1]

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1. Department of Chemistry, Atmospheric Science, Goeteborg University, SE-412 96 Goeteborg (Sweden)

Dissociative recombination of ammonia cluster ions with free electrons has been studied at the heavy-ion storage ring CRYRING (Manne Siegbahn Laboratory, Stockholm University). The absolute cross sections for dissociative recombination of H{sup +}(NH{sub 3}){sub 2}, H{sup +}(NH{sub 3}){sub 3}, D{sup +}(ND{sub 3}){sub 2}, and D{sup +}(ND{sub 3}){sub 3} in the collision energy range of 0.001-27 eV are reported, and thermal rate coefficients for the temperature interval from 10 to 1000 K are calculated from the experimental data and compared with earlier results. The fragmentation patterns for the two ions H{sup +}(NH{sub 3}){sub 2} and D{sup +}(ND{sub 3}){sub 2} show no clear isotope effect. Dissociative recombination of X{sup +}(NX{sub 3}){sub 2} (X=H or D) is dominated by the product channels 2NX{sub 3}+X [0.95{+-}0.02 for H{sup +}(NH{sub 3}){sub 2} and 1.00{+-}0.02 for D{sup +}(ND{sub 3}){sub 2}]. Dissociative recombination of D{sup +}(ND{sub 3}){sub 3} is dominated by the channels yielding three N-containing fragments (0.95{+-}0.05)

• OSTI ID: 20864344
• Journal Information: Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 19 Vol. 125; ISSN JCPSA6; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
AMMONIA
COLLISIONS
CROSS SECTIONS
DEUTERIDES
DEUTERIUM IONS
DISSOCIATION
ELECTRONS
EV RANGE 01-10
EV RANGE 10-100
EXPERIMENTAL DATA
FRAGMENTATION
HEAVY IONS
HYDROGEN IONS 1 PLUS
ION PAIRS
ISOTOPE EFFECTS
MILLI EV RANGE
MOLECULAR CLUSTERS
RECOMBINATION
STORAGE RINGS