Chemical effects of β- decay in 99Mo(CO)6

The chemical consequences following β- decay of 99Mo in Mo(CO)6 have been investigated. The yields of sup(99m)Tc species in solid state and in solution of n-pentane were determined by various separation methods. The sup(99m)Tc species are identified as sup(99m)Tc(CO)5 radicals, sup(99m)Tc2(CO)10 and sup(99m)Tcsup(n+) ions. The product yields were 73,7 and 7% respectively for the solid and 31,0 and 39% respectively for the solution. These results are discussed on the basis of the energy distribution of recoiling sup(99m)Tc atoms and the charge effects owing to perturbation of electron shells. (author)