Molecular structure conversion of fluorescein monoanions in an electrostatic storage ring T. Tanabe, M. Saito, K. Noda and E.B. Starikov Eur. Phys. J. D, 66 6 (2012) 163 Published online: 29 June 2012 DOI: 10.1140/epjd/e2012-20763-7