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Volume 123, Issue 13, 01 October 2005
123(2005); http://dx.doi.org/10.1063/1.2055287View Description Hide Description
As one of the typical examples of characteristic reaction field generated in inclusion (enclosure) compounds, the dynamics of an endohedral metallofullerene, , is studied with Be atom serving as a test probe. A very large dynamical and thermal fluctuation of electronic state of Be has been found, which is surprising since the highest occupied molecular orbital-lowest unoccupied molecular orbital gap of Be is so wide that such a large fluctuation in a low temperature is never expected. This finding demonstrates one of the special features of endohedral reaction field offered by the fullerene. The physical origin of this phenomenon is analyzed.
123(2005); http://dx.doi.org/10.1063/1.2062167View Description Hide Description
Collisional energy-transfer probability distribution functions of highly vibrationally excited molecules and the existence of supercollisions remain as the outstanding questions in the field of intermolecular energy transfer. In this investigation, collisional interactions between ground state Kr atoms and highly vibrationally excited azulene molecules ( internal energy) were examined at a collisionenergy of using a crossed molecular beam apparatus and time-sliced ion imaging techniques. A large amount of energy transfer in the backward direction was observed. We report the experimental measurement for the shape of the energy-transfer probability distribution function along with a direct observation of supercollisions.