L. Essen

Frequency of the Hydrogen Maser

L. Essen, R Donaldson, M. Bangham et al. · Nature · 1971 · 316 citations

Natural Sciences, Astronomy, Physics +7

An Atomic Standard of Frequency and Time Interval: A Cæsium Resonator

L. Essen, J. V. L. PARRY · Nature · 1955 · 286 citations

Engineering, Physics, Instrumentation +12

Frequency of Cesium in Terms of Ephemeris Time

Wm. Markowitz, R. G. Hall, L. Essen et al. · Physical Review Letters · 1958 · 190 citations

Natural Sciences, Earth Sciences, Geophysics +5

The Refractive Indices and Dielectric Constants of Air and its Principal Constituents at 24,000 Mc/s

L. Essen, K. D. Froome · Proceedings of the Physical Society Section B · 1951 · 151 citations

Natural Sciences, Physics, Instrumentation +16

The caesium resonator as a standard of frequency and time

L. Essen, J. V. L. PARRY · Philosophical Transactions of the Royal Society of London Series A Mathematical and Physical Sciences · 1957 · 97 citations

Natural Sciences, Physics, Electromagnetics +12