The molecule then drops down to one of the various vibrational levels of the ground electronic state again, emitting a photon in the process.
12.
It often results in a vibrationally excited molecular entity in the lower electronic state, which then usually decays to its lowest molecular vibrational level.
13.
The width and oscillatory nature of these lines are bound to the existence of transitions arising from high vibrational levels of excited radiative states.
14.
The orders of magnitude of k are summarized in Table 30 . k increases with the vibrational level of and heavier rare gases, Rg.
15.
For high vibrational levels, coupling overrides the vibrational relaxation while the contrary is true for the lowest levels, even if a rare gas is involved.
16.
However, the oscillator equation for predicting quantized vibrational levels shows that even when the vibrational quantum number is 0, the molecule still has vibrational energy.
17.
Because nitrogen is a homonuclear molecule, it cannot lose this energy by photon emission, and its excited vibrational levels are therefore metastable and relatively long-lived.
18.
As molecules may drop down into any of several vibrational levels in the ground state, the emitted photons will have different energies, and thus frequencies.
19.
A systematic study of the lifetimes of several vibrational levels ( vd " 136 ) of states B and C was conducted as reported in Table 19.
20.
Therefore, by analysing the different frequencies of light emitted in fluorescent spectroscopy, along with their relative intensities, the structure of the different vibrational levels can be determined.
