Continuous-wave measurement of the hydrogen 1S-2S transition frequency.
We have measured the 1S-2S transition frequency in atomic hydrogen with a precision of 7 parts in 1010 by continuous-wave Doppler-free two-photon spectroscopy. We employ cavity-enhanced multimilliwatt radiation near 243 nm produced by sum-frequency generation, and we observe the 1S-2S transition in...
| Main Authors: | , , , , , |
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| Format: | Journal article |
| Sprog: | English |
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1989
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| _version_ | 1826260249849364480 |
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| author | McIntyre, D Beausoleil, R Foot, C Hildum, E Couillaud, B Hänsch, T |
| author_facet | McIntyre, D Beausoleil, R Foot, C Hildum, E Couillaud, B Hänsch, T |
| author_sort | McIntyre, D |
| collection | OXFORD |
| description | We have measured the 1S-2S transition frequency in atomic hydrogen with a precision of 7 parts in 1010 by continuous-wave Doppler-free two-photon spectroscopy. We employ cavity-enhanced multimilliwatt radiation near 243 nm produced by sum-frequency generation, and we observe the 1S-2S transition in a low-pressure hydrogen-helium cell with a resolution of 3 parts in 109. For a frequency comparison we detect an optical heterodyne signal at the difference frequency between the 243-nm light used to excite the 1S-2S transition and the second harmonic of a reference laser locked to an interferometrically calibrated Te2130 absorption line near 486 nm. After determining systematic corrections due to the pressure shift of the F=1 hyperfine component in a 0.7 vol. % hydrogen 99.3 vol. % helium gaseous mixture, we obtain the energy-level separation f(1S-2S) =2 466 061 413.2(18) MHz. Choosing a value of the Rydberg constant measured independently by high-resolution spectroscopy of the hydrogen Balmer- transition, we find the hydrogen ground-state Lamb shift to be fLS(1S)=8173.9(19) MHz, in good agreement with the theoretical value of 8172.89(9) MHz. © 1989 The American Physical Society. |
| first_indexed | 2024-03-06T19:02:40Z |
| format | Journal article |
| id | oxford-uuid:14132d14-b19c-4e66-b18f-8b972f81b8a3 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T19:02:40Z |
| publishDate | 1989 |
| record_format | dspace |
| spelling | oxford-uuid:14132d14-b19c-4e66-b18f-8b972f81b8a32022-03-26T10:17:33ZContinuous-wave measurement of the hydrogen 1S-2S transition frequency.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:14132d14-b19c-4e66-b18f-8b972f81b8a3EnglishSymplectic Elements at Oxford1989McIntyre, DBeausoleil, RFoot, CHildum, ECouillaud, BHänsch, TWe have measured the 1S-2S transition frequency in atomic hydrogen with a precision of 7 parts in 1010 by continuous-wave Doppler-free two-photon spectroscopy. We employ cavity-enhanced multimilliwatt radiation near 243 nm produced by sum-frequency generation, and we observe the 1S-2S transition in a low-pressure hydrogen-helium cell with a resolution of 3 parts in 109. For a frequency comparison we detect an optical heterodyne signal at the difference frequency between the 243-nm light used to excite the 1S-2S transition and the second harmonic of a reference laser locked to an interferometrically calibrated Te2130 absorption line near 486 nm. After determining systematic corrections due to the pressure shift of the F=1 hyperfine component in a 0.7 vol. % hydrogen 99.3 vol. % helium gaseous mixture, we obtain the energy-level separation f(1S-2S) =2 466 061 413.2(18) MHz. Choosing a value of the Rydberg constant measured independently by high-resolution spectroscopy of the hydrogen Balmer- transition, we find the hydrogen ground-state Lamb shift to be fLS(1S)=8173.9(19) MHz, in good agreement with the theoretical value of 8172.89(9) MHz. © 1989 The American Physical Society. |
| spellingShingle | McIntyre, D Beausoleil, R Foot, C Hildum, E Couillaud, B Hänsch, T Continuous-wave measurement of the hydrogen 1S-2S transition frequency. |
| title | Continuous-wave measurement of the hydrogen 1S-2S transition frequency. |
| title_full | Continuous-wave measurement of the hydrogen 1S-2S transition frequency. |
| title_fullStr | Continuous-wave measurement of the hydrogen 1S-2S transition frequency. |
| title_full_unstemmed | Continuous-wave measurement of the hydrogen 1S-2S transition frequency. |
| title_short | Continuous-wave measurement of the hydrogen 1S-2S transition frequency. |
| title_sort | continuous wave measurement of the hydrogen 1s 2s transition frequency |
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