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University of Colorado Physics Professor Emeritus Richard C. (Dick) Mockler passed away April 6, 2011 in Los Alamos, NM. He is survived by his sons Ted and Fritz.

Dick was born in Middleton, Ohio in 1925. He earned his B.S. in chemistry from Northwestern University in 1948, his M.S. in chemistry from the University of Chicago in 1950 and his Ph.D. from Duke University in 1954. He was an assistant professor at the University of Kentucky 1953-1954.

From 1954 to 1965, Dick Mocker was the Chief of the Atomic Frequency and Time Interval Standards Section of the National Bureau of Standards (NBS), later the National Institute for Standards and Technology (NIST), in Boulder, Colorado. He was Chief of the Quantum Electronics Section of NBS 1965-1966. During his time at NBS, Dick was the scientific leader responsible for the construction of NBS-1 and NBS-2, the earliest NBS Cesium atomic clocks. Four decades of subsequent atomic clocks, NBS-3 through NBS-6, were based on the same fundamental design principles as NBS-1 and NBS-2. Dick’s influential paper “Atomic Beam Frequency Standards” in Advances in Electronics and Electron Physics (Academic, New York, 1961) assembled and synthesized many aspects of atomic clock construction and is still widely read by scientists today.

Dr. Mockler was awarded a Department of Commerce Exceptional Service Gold Medal Award in 1961 for “scientific leadership and personal technical c