Protonated water clusters in TPC's
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Date
2016-07-11
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Elsevier
Abstract
Water vapour is added to the ALICE TPC gas to enhance its stability. These polar molecules create large protonated water clusters around a H+ core. In this context, the reactions H3O+ (H2O)(n-1) + H2O -> H-3 O+(H2O)(n) (n=1-9) were studied in the gas phase. Structures for these clusters are suggested and the most stable structures for each cluster size are shown. The thermodynamic parameters Delta H-n-1,n(0), Delta G(n-1,n)(0), Delta S-n-1,n(0) and equilibrium constants K-n-1,K-n for the reaction were calculated to determine the size of the water clusters. The results are close to experimental data found in the literature. Protonated water clusters at stp have a size of 6-9 which corresponds to a mass of 127.1-181.2 g/mole.
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Keywords
Instruments & Instrumentation, Nuclear science & technology, Physics, Protonated water cluster, DFT calculations, Thermodynamic parameters, Gas detectors, Gas-phase, Ion, Equilibrium constants, Gas detectors, Cluster sizes, DFT calculation, Polar molecules, Protonated water clusters, Stable structures, Thermodynamic parameter, Water cluster, Water vapour, Protonation
Citation
Kaya, Y. vd. (2016). "Protonated water clusters in TPC's". Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment, 824, 535-537.