New Millisecond Isomer Lifetime Measurements at LANSCE

New half-life measurements have been made of the millisecond isomers Ge-71m, I-114m2, Bi-208m, Y-88m1, Y-88m2, and As-75m populated in neutron-induced reactions. These measurements were made using the unique time structure of the LANSCE/WNR neutron source, by observing the gamma-ray decays of the isomers during the time between the LANSCE proton macropulses. Two different LANSCE proton beam time structures were used. The GEANIE array of HPGe detectors was used to detect the gamma-ray decays.