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A dication is a molecular species which has two electrons removed. Dications often decay quickly into two singly charged particles. Energy levels of dications can be studied with good resolution by measuring the yield of pairs of zero-kinetic-energy electrons from double photoionization of a molecule as a function of the photoionizing wavelength (threshold photoelectrons coincidence spectroscopy - TPEsCO).

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Dication". A list of authors is available in Wikipedia.
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