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Non-scrambling of hydrogen in NH4+(H2O)3 clusters

Journal article
Authors Klavs Hansen
Erika Sundén
Kristian Støchkel
Steen Brøndsted Nielsen
Bertil Dynefors
Published in RSC Advances
Volume 9
Pages 6620-6626
ISSN 2046-2069
Publication year 2019
Published at Department of Physics (GU)
Pages 6620-6626
Language en
Keywords Water ammonia clusters, hydrogen scrambling
Subject categories Physical Chemistry, Atom and Molecular Physics and Optics


We have measured the metastable decay of protonated, ammonia-doped, deuterated water clusters produced in an electrospray source, dn-NH4 +(H2O)3, n ¼ 0–6. The mass spectra show a very strong odd–even effect, consistent with a low degree of scrambling of the hydrogen bound to water and to the ammonia. The relative evaporation rate constant for light water was almost twice the one for heavy water, with the rate for mixed protium–deuterium water molecule intermediate between these two values.

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