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SUMMARY:Scattering of OH at the gas-liquid interface
DTSTART:20220530T163000
DTSTAMP:20260928T210204Z
UID:923717bd80510ba1cb3e36ced274477b755b3de39802cd4f0f7ba934
CATEGORIES:Conferences - Seminars
DESCRIPTION:Professor Kenneth G McKendrick - Physical Chemistry Institute 
 of Chemical Sciences\, School of Engineering and Physical Sciences - Herio
 t-Watt University\, Edinburgh UK\nAbstract: The gas-liquid interface is ce
 ntral to many problems of real-world significance\, but mechanisms of upta
 ke and reaction are relatively poorly understood compared to gas-phase or 
 gas-solid interactions. As a specific example\, OH radicals are a principa
 l oxidant of organic species at the surfaces of atmospheric aerosol partic
 les. This 'ageing' of the aerosols has important climatic consequences. We
  have been studying collisions of OH molecules with proxy liquid surfaces 
 under controlled conditions to understand the factors affecting the transf
 er of energy and probability of reaction. A pulsed molecular beam of OH is
  directed at a liquid surface in vacuum. The spatial distribution of OH in
  specific quantum states is detected by pulsed\, planar laser-induced fluo
 rescence. Recording a sequence of images as a function of delay allows t
 he motions of the incident packet and of the scattered OH molecules to be 
 tracked. The image sequence can be analysed to determine the OH survival p
 robability and the dynamical properties of the scattered molecules\, from 
 which mechanisms of reaction and inelastic energy exchange are inferred.
LOCATION:CH G1 495 https://plan.epfl.ch/?room==CH%20G1%20495
STATUS:CONFIRMED
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