Breakdown of the Born-Oppenheimer Approximation in Diatomic Molecules
Robert Field
No enrollment limit, no advance sign up
Participants welcome at individual sessions (series)
Prereq: 5.61 or equivalent and an interest in molecular dynamics
A lecture series on photofragmentation dynamics in diatomic molecules. The first lecture introduces terms in the Hamiltonian, especially troublesome Born-Oppenheimer breakdown terms that "cause" all intramolecular dynamics. Subsequent lectures include topics: perturbations, autoionization, predissociation, semiclassical calculation of vibrational overlap integrals, wavepacket dynamics, and the Landau-Zener picture of electronic transitions induced by crossing potential curves.
Contact: Robert Field, 6-219, 253-1489, rwfield@mit.edu
Cosponsor: Chemistry
Introduction to the Spectroscopic Effective Hamiltonian
Robert Field
The Born-Oppenhiemer approximation and matrix elements of terms in the effective molecular Hamiltonian that violate the BO approximation. Vibration, rotation, spin-orbit, interelectronic interaction. Hund's coupling cases.
Mon Jan 3, 09-10:30am, 6-233
Spectroscopic Perturbations, Predissociation, and Autoionization
Robert Field
Introduction to dynamical processes.
Tue Jan 4, 09-10:30am, 6-233
Semiclassical methods for calculating vibrational overlap integrals
Robert Field
All coupling processes are mediated by vibrational overlap integrals, which are computed numerically. Semiclassical calculation of overlaps reveals physical factors controlling computed values: the length of the stationary phase region is controlled by the slopes of the potential curves at the intersection and the velocity in the crossing region.
Wed Jan 5, 09-10:30am, 6-233
Wavepackets and Landau-Zener
Robert Field
What happens in the vicinity of a curve crossing?
Fri Jan 7, 09-10:30am, 6-233
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G. R. Harrison Spectroscopy Laboratory: Four "Whys" in Multidimensional Spectroscopy
Michael S. Feld
Wed Jan 19, 09-11:30am, 34-401A
No enrollment limit, no advance sign up
Single session event
Prereq: None
This symposium will explore the basis for coherent multidimensional spectroscopy.
John Waugh, MIT Professor Emeritus
Multidimensional Spectroscopy — Why it started with NMR and (mostly) stays there.
Robert Griffin, MIT Francis Bitter Magnet Laboratory
Multidimensional NMR in rotating solids — Why high resolution?
Joseph Loparo, MIT Department of Chemistry
Two-dimensional IR spectroscopy: Observing coherent vibrations and hydrogen bond dynamics in water — Why two dimensions are better than one.
Keith Nelson, MIT Department of Chemistry
Multidimensional Spectroscopy — Why it is moving to the optical regime and has a glowing future there.
Web: http://web.mit.edu/spectroscopy/events/iap.html
Contact: Vinnie Russo, 6-014, x3-9774, vrusso@mit.edu
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G.R. Harrison Spectroscopy Laboratory: Optical Imaging, Scattering, and Interference for Biological Investigations
Gabriel Popescu
No enrollment limit, no advance sign up
Participants welcome at individual sessions (series)
Prereq: Prior acquaintance with optics and EM theory
The theme of this course is the study of modern optical technologies based on microscopy, scattering, and interference for biomedical investigations. More details of topics can be found on the Spectroscopy Lab website.
Web: http://web.mit.edu/spectroscopy/events/iap.html
Contact: Gabriel Popescu, 6A-230D, x2-7831, gpopescu@mit.edu
Introduction
Gabriel Popescu
Introduction to optical imaging, scattering, and interference for biological investigations.
Wed Jan 5, 02-03:00pm, 1-375
Session 2
Gabriel Popescu
Math toolbox: Linear Sytems, covolutions, Fourier transform, useful theorems.
Thu Jan 6, 02-03:00pm, 1-375
Session 3
Gabriel Popescu
Elements of optical microscopy: imaging systems, resolution, contrast, examples.
Fri Jan 7, 02-03:00pm, 1-375
Session 4
Gabriel Popescu
Bright field, dark field, Schlerein, phase contrast, DIC/ Nomarski, confocal, etc.
Mon Jan 10, 02-03:00pm, 1-375
Session 5
Gabriel Popescu
Light scattering techniques: light scattering in inhomogeneous media, single scattering, multiple scattering, diffusion model.
Tue Jan 11, 02-03:00pm, 1-375
Session 6
Gabriel Popescu
Light scattering spectroscopy and diagnostics of early cancer.
Wed Jan 12, 02-03:00pm, 1-375
Session 7
Gabriel Popescu
Interferometric methods for diagnostics: field cross- correlations, cross-spectral densities; coherence time, area, interferometric geometries.
Thu Jan 13, 02-03:00pm, 1-375
Session 8
Gabriel Popescu
Michelson interferometry with polychromatic fields: optical gating, ODR- optical domain reflectometry, thickness/ refractive index measurements, OCT and applications.
Fri Jan 14, 02-03:00pm, 1-375
Session 9
Gabriel Popescu
Phase-based techniques of investigation: point measurements, harmonic, phase-referenced.
Tue Jan 18, 02-03:00pm, 1-375
Session 10
Gabriel Popescu
Quantitative phase microscopy: Fourier Phase Microscopy, applications for imaging cellular structure and dynamics.
Thu Jan 20, 02-03:00pm, 1-375
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