  Surface waves propagating in the semi-bounded collisional hot QCD medium
(quark-gluon plasma) are considered. To investigate the effect of collisions as
damping and non-ideality factor, the longitudinal and transverse dielectric
functions of the quark-gluon plasma are used within the Bhatnagar-Gross-Krook
(BGK) approach. The results were obtained both analytically and numerically in
the long wavelength limit. First of all, collisions lead to smaller values of
surface wave frequency and their stronger damping. Secondly, the results show
that non-ideality leads to the appearance of a new branch of surface waves
compared to the collisionless case. The relevance of the surface excitations
(waves) for the QGP realized in experiments is discussed.
