Vibrational predissociation of He–I2*(<i>v</i>)–Ne: An approximate quantal study

Abstract

The vibrational predissociation (VP) of the He–I2(B 3Π0+u,v)–Ne complex is studied in the range of initial vibrational excitations 25≤v≤35. The rare gas atoms are restricted to move on a perpendicular plane to the I2 axis. A simple addition of pairwise Morse atom–atom interactions is used to describe the potential energy surface. The breaking up of the I2–Ne bond is found to be the dominant dissociation channel for v≤29. However, due to the anharmonicity of the I2 stretch, the situation for v&amp;gt;29 is just the opposite and the He atom escapes first.