ULTRAVIOLET PHOTOLYSIS AND FORMATION OF IRON PHOSPHIDE CLUSTER IONS

A variety of iron phosphide cluster ions were produced by laser ablati on. It is indicated that the reaction between iron ion and neutral pho sphorus cluster results in the production of these cluster ions, expla ining qualitatively the odd-even variation of mass abundance. Also inv estigated were the properties of photolysis of these cluster ions at 2 48 nm which shows some basic units, FeP2+ and Fe2P+. or complexes comp osed of several basic units existing in larger cluster ions, based on which a chain structure of cluster ions was then formed. The above con clusions are supported by the theoretical calculation of the DV-X alph a method.