COLLISIONAL SHIFT AND BROADENING OF ANTIPROTONIC HELIUM SPECTRAL 
LINES

D.Bakalov*, B.Jeziorski+, T.Korona+, K.Szalewicz# and E.Tchoukova*

* Institute for Nuclear Research and Nuclear Energy,
  Bulgarian Academy of Sciences, Sofia, Bulgaria
+ Department of Chemistry, University of Warsaw, Warsaw, Poland
# Department of Physics and Astronomy, University of Delaware,
    Newark, DE, USA

We present the theoretical results on the collisional shift and
broadening of the transition lines between highly excited rotational
states of the exotic antiprotonic helium atoms, based on the
values of the interaction energy with helium atoms calculated
by means of the Symmetry-Adapted Perturbation Theory.