Related Experiment Video
Updated: Mar 16, 2026

Measurement of Spatial Stability in Precision Grip
Published on: June 4, 2020
Precision Measurement of Fundamental Constants Using GAMS4
1National Institute of Standards and Technology, Gaithersburg, MD 20899-0001, USA.
Abstract:
We discuss the connection of high-energy gamma-ray measurements with precision atomic mass determinations. These rather different technologies, properly combined, are shown to lead to new values for the neutron mass and the molar Planck constant. We then proceed to describe the gamma-ray measurement process using the GAMS4 facility at the Institut Laue-Langevin and its application to a recent measurement of the 2.2 MeV deuteron binding energy and the neutron mass. Our paper concludes by describing the first crystal diffraction measurement of the 8.6 MeV (36)Cl binding energy.
Related Concept Videos
Measurement: Standard Units
Measurement: Derived Units
Estimation of the Physical Quantities
Uncertainty in Measurement: Reading Instruments
Accuracy and Precision
Units and Standards of Measurement

