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VERSION:2.0
PRODID:-//Memento EPFL//
BEGIN:VEVENT
SUMMARY:Chemistry below 1 K
DTSTART:20131031T163000
DTEND:20131031T173000
DTSTAMP:20260406T185158Z
UID:e494246e156605ec2eb6f5d68d3ae9d46095e963e2886dc68c81570e
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Andreas Osterwalder\nUntil last year\, no experimental d
 ata was available for chemical reaction rates below 7 K. Such low temperat
 ures are important in astrochemistry\, but also for an understanding of fu
 ndamental aspects of chemical dynamics like tunneling\, scattering resonan
 ces\, long-range forces\, or steric effects. Crossed-beam experiments\, th
 e main tool to study gas-phase chemistry for the past decades\, is difficu
 lt to extend to low temperatures. Newer approaches that involve the produc
 tion of slow molecules thus far have not provided any results in reactive 
 scattering.\nWe have developed a new technique that enables us to study mo
 lecular scattering in a temperature range from beyond 200 K to significant
 ly below 1 K: merged neutral molecular beams. We use technologies develope
 d for the deceleration of neutral molecules to bend two beams\, without ch
 anging the forward velocity\, such that they move along the same axis. Sin
 ce the center-of-mass velocity of the molecules is irrelevant for the coll
 ision energy\, this provides an elegant way to reach low temperatures with
  fast molecules.\nThis technique is a very powerful tool to study low-ener
 gy collisions between any pair of polar and paramagnetic particles\, and i
 t paves the way towards a quantitative understanding of interstellar chemi
 stry as well as of many fundamental effects in chemistry in general.\nIn t
 his talk I will introduce our experiment and show first results\, namely t
 he Ne*+ND3 Penning ionization which we have studied at temperatures in the
  range 0-250 K.
LOCATION:CH G1 495 https://plan.epfl.ch/?room==CH%20G1%20495
STATUS:CONFIRMED
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