ISSPIC XV – 15th international symposium on small particles and inorganic clusters Ignacio L. Garzón, Luis A. Pérez, Gabriela Díaz and Cecilia Noguez Eur. Phys. J. D, 63 2 (2011) 169 Published online: 05 July 2011 DOI: 10.1140/epjd/e2011-20260-7