An interferometric measurement of the 1s-2s transition frequency in atomic hydrogen
An interferometric measurement of the 1s-2s transition frequency in atomic hydrogen
Two photon Doppler free laser spectroscopy has been used to measure the 1S½--2S½ transition frequency in atomic hydrogen by interferometric comparison with a reference line in 130Te2. The measured 1S½--2S½ transition frequency of 2 466 061 397 (25) MHz is in good agreement with the theoretical value 2 466 061 405.5 (2.9) MHz. This measurement can be used to deduce a value for the ground state Lamb shift giving 8182(25) MHz, which may be compared with a theoretical value 8173.248(81) MHz. Alternatively a value of the Rydberg constant can be deduced as 10 973 731.50 (11) m-1 which is consistent with other measurements but with a slightly larger uncertainty. This is the first time that the Rydberg constant has been measured on a transition in atomic hydrogen other than Balmer (alpha) using techniques of laser spectroscopy.
University of Southampton
Barr, John Richard McAlpine
74742d08-7859-45c8-8c85-1b7bf4496435
May 1986
Barr, John Richard McAlpine
74742d08-7859-45c8-8c85-1b7bf4496435
Ferguson, A.I.
7764759c-2b56-4e74-ad3d-fc8b666853c3
Barr, John Richard McAlpine
(1986)
An interferometric measurement of the 1s-2s transition frequency in atomic hydrogen.
University of Southampton, Physics Department, Doctoral Thesis, 249pp.
Record type:
Thesis
(Doctoral)
Abstract
Two photon Doppler free laser spectroscopy has been used to measure the 1S½--2S½ transition frequency in atomic hydrogen by interferometric comparison with a reference line in 130Te2. The measured 1S½--2S½ transition frequency of 2 466 061 397 (25) MHz is in good agreement with the theoretical value 2 466 061 405.5 (2.9) MHz. This measurement can be used to deduce a value for the ground state Lamb shift giving 8182(25) MHz, which may be compared with a theoretical value 8173.248(81) MHz. Alternatively a value of the Rydberg constant can be deduced as 10 973 731.50 (11) m-1 which is consistent with other measurements but with a slightly larger uncertainty. This is the first time that the Rydberg constant has been measured on a transition in atomic hydrogen other than Balmer (alpha) using techniques of laser spectroscopy.
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Barr_1986_thesis_1730T.pdf
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Published date: May 1986
Organisations:
University of Southampton, Physics & Astronomy
Identifiers
Local EPrints ID: 396719
URI: http://eprints.soton.ac.uk/id/eprint/396719
PURE UUID: aea71c34-861b-423d-8a51-b89823278234
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Date deposited: 22 Jun 2016 12:38
Last modified: 15 Mar 2024 00:58
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Contributors
Author:
John Richard McAlpine Barr
Thesis advisor:
A.I. Ferguson
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