[MOS] TODAY: 1/23: Special Seminar with Prof. Daniel Neumark (UC Berkeley)

[Christine Brooks]

Please join us for a special Modern Optics and Spectroscopy seminar today at 12pm in MIT Room 6-120:


Professor Daniel Neumark
University of California, Berkeley

Slow Electron Velocity Map Imaging of Cryogenically Cooled Anions

Slow-electron velocity-map imaging of cryogenically cooled anions (cryo-SEVI) is a high resolution variant of anion photoelectron spectroscopy that yields spectra of complex species with resolution as high as 1-2 cm-1. This resolution is achieved by trapping anions in an octopole trap in which buffer-gas cooling brings their temperature down to approximately 10 K. The anions are then extracted from the trap, mass-selected, and photodetached. The resulting photoelectrons are analyzed with velocity-map imaging electron optics set up to selectively collect slow electrons. This technique reveals extensive vibrational structure associated with the neutral species generated by photodetachment. Results will be presented for free radicals, bare and complexed metal oxide clusters, and transition state species associated with unimolecular and bimolecular reactions.

Refreshments will be served in the lobby of Building 6 immediately following the seminar


Christine Brooks
Administrative Assistant
Massachusetts Institute of Technology
Department of Chemistry
77 Massachusetts Ave, 6-333
Cambridge, MA 02139
p: 617.253.7239
e: cbrooks at mit.edu<mailto:cbrooks at mit.edu>

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