Rotation-vibration Spectra of Molecules
Supervisor: Dr. Mieczyslaw Pluta
The
investigation of rotation-vibration
spectra is done on a diatomic molecule (HCl). The theoretical
treatment
is done in the framework of quantum mechanics with help of the
so-called dumbbell model. The interaction of the oscillator
and the
rotator is included. Due to the precision and the spectral
resolving
power of the spectrometer it is possible to measure the
rotational
constant in dependence on the vibrational quantum number.
Besides the
influence of the chlorine isotopes on the spectrum may be
investigated.
The dependence of the intensity of the lines on the wave
number has to
be calculated for the interpretation of the Bjerrums double
bands. The
parameters of the used spectrometer (resolving power, stray
light) have
to be determined.
- Experimental determination of the vibration wave number, of the rotational constant, and of the distance between the ions
- Influence of the isotopes on the spectra
- Dumbbell model (quantum mechanical treatment)
- Interaction between oscillator and rotator
- Basics of infrared spectroscopy
