Frontier experiments: Tough science

Counting the atoms in a²⁸Si crystal for a new kilogram definition

Birk Andreas, Yasushi Azuma, Guido Bartl et al. · Metrologia · 2011 · 184 citations

Natural Sciences, Chemistry, Materials Science +17

Uncertainty Improvements of the NIST Electronic Kilogram

Richard Steiner, Edwin R. Williams, Ruimin Liu et al. · IEEE Transactions on Instrumentation and Measurement · 2007 · 142 citations

Engineering, Physics, Instrumentation +14

An initial measurement of Planck's constant using the NPL Mark II watt balance

I A Robinson, B P Kibble · Metrologia · 2007 · 130 citations

Engineering, Physics, Instrumentation +7