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Effect of internal energy on the repulsive Coulomb barrier of polyanions.

Horke, D.A. and Chatterley, A.S. and Verlet, J.R.R. (2012) 'Effect of internal energy on the repulsive Coulomb barrier of polyanions.', Physical review letters., 108 (8). 083003.


The nature of the repulsive Coulomb barrier in isolated molecular polyanions is studied by means of the photodetachment dynamics of the S1 excited state of the fluorescein dianion which is bound solely by the repulsive Coulomb barrier. Photoelectron spectra reveal a feature at a constant electron kinetic energy, regardless of the excitation energy. This is explained by using an adiabatic tunneling picture for electron loss through successive repulsive Coulomb barriers correlating to vibrationally excited states. This physical picture is supported by time-resolved photoelectron spectra, showing that the tunneling lifetime is also invariant with excitation energy.

Item Type:Article
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Publisher statement:Reprinted with permission from the American Physical Society: Physical Review Letters 108, 083003 © (2012) by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.
Date accepted:No date available
Date deposited:05 February 2016
Date of first online publication:February 2012
Date first made open access:No date available

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