ROTATIONAL SPECTRUM OF SO3 AND THEORETICAL EVIDENCE FOR THE FORMATION OF ROTATIONAL ENERGY LEVEL CLUSTERS IN ITS VIBRATIONAL GROUND STATE

DANIEL S UNDERWOOD, Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom; SERGEI N. YURCHENKO, Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom; JONATHAN TENNYSON, Department of Physics and Astronomy, University College London, London, IX, United Kingdom; PER JENSEN, Faculty of Mathematics and Natural Sciences, University of Wuppertal, Wuppertal, Germany.