Optical spectroscopy at colour centres and molecules
Supervisor: M. Sc. D. Reinhardt
The
common physical property of colour centers and the iodine
molecule (which will be investigated in this experiment) is
the interaction between electronic transitions and vibrations
of the atoms. Therefore the Franck-Condon principle holds for
both. The position of the absorption maxima of the measured
iodine vapour spectrum have to be determined, and from that
the convergence energy, the dissociation energy, and the
energy of the electronic transition are to be estimated. The
colour centers are generated in NaCl-,KCl-, and KBr-crystals
by UV- radiation or X-rays. The absorption spectra provide the
concentration of the centers in dependence on time, the energy
of the electronic transition and the line width. The results
have to be compared to values calculated with a classical and
a quantum mechanical model.
- Generation of colour centers
- Determination of energetic position and of concentration of the centers
- Calculations within the classical and quantum mechanical model
- Morse potential
- Energy schemes of molecules
- Franck-Condon principle
- Experimental determination of the characteristic energies
- Optical spectroscopy in the range of visible light, resolving power
- Calculation of the absorption coefficient
description of this experiment
Manua Lambda 365