Terminating bands in {sup 98,99,100}Ru and neutron 2d{sub 5/2}-1g{sub 7/2} energy spacing

New high-spin bands have been established in {sup 98,99,100}Ru. Some are interpreted as terminating configurations using the Nilsson-Strutinsky cranking formalism. They are observed up to the predicted terminating states which are built from g{sub 9/2} protons and N=3 proton holes combined with d{sub 5/2}, g{sub 7/2} and h{sub 11/2} neutrons relative to a {sup 90}Zr core. The observed high-spin states assigned as terminating show systematic behavior and provide new information on the energy spacing between the 2d{sub 5/2} and 1g{sub 7/2} neutron subshells.