Measurement of the Unperturbed Hydrogen Hyperfine Transition Frequency
- 1 November 1970
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Instrumentation and Measurement
- Vol. 19 (4), 200-209
- https://doi.org/10.1109/tim.1970.4313902
Abstract
The results of a joint experiment aimed primarily at the determination of the frequency of the H1 hyperfine transition (F = 1, mF = 0) ↔ (F = 0, mF = 0) is reported. In terms of the frequency of the Cs133 hyperfine transition (F = 4, mF = 0) ↔(F = 3, mF = 0), defined as 9192 631 770 Hz, for the unperturbed hydrogen transition frequency the value υH = 1420 405 751.768 Hz is obtained. This result is the mean of two independent evaluations against the same cesium reference, which differ by 2 × 10-3 Hz. We estimate the one-sigma uncertainty of the value υH also to be 2 × 10-3 Hz. One evaluation is based on wall-shift experiments at Harvard University; the other is a result of a new wall-shift measurement using many storage bulbs of different sizes at the National Bureau of Standards. The experimental procedures and the applied corrections are described. Results for the wall shift and for the frequency of hydrogen are compared with previously published values, and error limits of the experiments are discussed.Keywords
This publication has 25 references indexed in Scilit:
- H Maser Wall ShiftMetrologia, 1970
- Multiple-Region Hydrogen Maser with Reduced Wall ShiftPhysical Review A, 1970
- Atomic Hydrogen Maser Development at the National Research Council of CanadaMetrologia, 1968
- Measurement of the frequency drift of a hydrogen standard owing to atomic impacts on the flask wallMeasurement Techniques, 1968
- Spin-Exchange Shifts in the Hydrogen MaserPhysical Review B, 1967
- Cesium Beam Atomic Time and Frequency StandardsMetrologia, 1965
- HYDROGEN MASER FREQUENCY COMPARISON WITH SWISS CESIUM ATOMIC BEAM STANDARDApplied Physics Letters, 1965
- HYDROGEN MASER AND CESIUM BEAM TUBE FREQUENCY STANDARDS COMPARISONApplied Physics Letters, 1965
- The Atomic Hydrogen MaserMetrologia, 1965
- Hyperfine Separation of Ground-State Atomic HydrogenPhysical Review Letters, 1963