Title :
Determination of the fine-structure constant by measuring the quotient of the Planck constant and the neutron mass
Author :
Kruger, E. ; Nistler, W. ; Weirauch, W.
Author_Institution :
Physikalisch Tech. Bundesanstalt, Braunschweig, Germany
Abstract :
At the high-flux reactor of the Institut Laue-Langevin in Grenoble, the fine-structure constant was measured with a relative uncertainty of 3.9/spl times/10/sup -8/. After publication of this value, the experiment was continued. The latest results are given.
Keywords :
baryon mass; constants; fine structure; hydrogen neutral atoms; measurement errors; neutron beams; neutron polarisation; time of flight spectroscopy; H; H atom theory; Heusler crystals; Planck constant; Rydberg constant; TOF method; fine-structure constant; meander coil; modulation; neutron mass; neutron velocity; polarized neutron beam; quotient determination; relative uncertainty; Coils; Detectors; Hydrogen; Intensity modulation; Magnetic modulators; Neutrons; Polarization; Reflection; Silicon; Velocity measurement;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 1996 Conference on
Conference_Location :
Braunschweig, Germany
Print_ISBN :
0-7803-3376-4
DOI :
10.1109/CPEM.1996.547381
