Abstract

Photoinduced Coulombic fission of doubly charged lithium-atom clusters is observed for cluster sizes around the critical size of stability. The absolute value of the outer part of the Coulombic barrier is deduced from kinetic-energy-release measurements. The inner part is obtained from unimolecular decay. Such analysis provides a complete characterization of the energetics of the fissioning system. \textcopyright{} 1996 The American Physical Society.

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