STUDIES ON THE STABILITY OF IRON PHOSPHID E CLUSTER IONS

The formation and stability of FexPy+ cluster ion produced by laser ab lation were investigated. The gas-phase reaction equation in the forma tion of these cluster ions is P-x+Fe-x(+)-->FexPy+Px-y. And the odd-ev en variation related to the number of P atom in mass spectrum was expl ained with the calculation of the electronic occupied state in the clu ster ions in which the electronic structure of transition metal domina tes the bonding in cluster ions, and the higher ionization energy of e ven cluster ions results in removing easily electrons from the-single electron occupied states of cluster ions.