Rotation-vibration Spectra of Molecules
Supervisor: Dr. Volker Riede
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 Bjerrum´s 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
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