  The Jahn-Teller effect used semi-theoretically to analyse UV-visible spectra
of the diamond like-carbon films on Si substrates. By deconvolution of
UV-visible absorption spectra of the typical films, different absorption lines
found. For each sample, six lines which were related to $\V^\circ$ by
Jahn-Teller effect are distinguished. Our theoretical approach based on
distortion of the $\V^\circ$ as the consequence of the stress in the films, is
in agreement with experimental results. The shift of the Jahn-Teller lines
toward the zero phonon line of $\V^\circ$ were found in accordance to stress
decrease in the films. The difference between room temperature and low
temperature spectra is discussed. We found that the splitting of the excited
state of $\V^\circ$ in the films under stress is twice as large as that of the
ground state.
