A Monte Carlo approach for determining cluster evaporation rates from concentration measurements
Item
Title (Dublin Core)
A Monte Carlo approach for determining cluster evaporation rates from concentration measurements
Description (Dublin Core)
Evaporation rates of small negatively charged sulfuric acid–ammonia clusters are determined by combining detailed cluster formation simulations with cluster distributions measured in the CLOUD experiment at CERN. The analysis is performed by varying the evaporation rates with Markov chain Monte Carlo (MCMC), running cluster formation simulations with each new set of evaporation rates and comparing the obtained cluster distributions to the measurements. In a second set of simulations, the fragmentation of clusters in the mass spectrometer due to energetic collisions is studied by treating also the fragmentation probabilities as unknown parameters and varying them with MCMC. This second set of simulations results in a better fit to the experimental data, suggesting that a large fraction of the observed HSO<sub>4</sub><sup>−</sup> and HSO<sub>4</sub><sup>−</sup> ⋅ H<sub>2</sub>SO<sub>4</sub> signals may result from fragmentation of larger clusters, most importantly the HSO<sub>4</sub><sup>−</sup> ⋅ (H<sub>2</sub>SO<sub>4</sub>)<sub>2</sub> trimer.
Creator (Dublin Core)
Kupiainen-Määttä, Oona
Date (Dublin Core)
2018-09-18
Type (Dublin Core)
info:eu-repo/semantics/Text
Format (Dublin Core)
info:eu-repo/semantics/application/pdf
Identifier (Dublin Core)
10.5194/acp-16-14585-2016
https://acp.copernicus.org/articles/16/14585/2016/
Source (Dublin Core)
eISSN: 1680-7324
Language (Dublin Core)
eng
Relation (Dublin Core)
info:eu-repo/grantAgreement/EC/FP7/257360
Rights (Dublin Core)
info:eu-repo/semantics/openAccess
