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Title: Doppler-free laser spectroscopy of atomic hydrogen using pulsed lasers
Author: Tolchard, John Michael
ISNI:       0000 0001 3534 467X
Awarding Body: University of Southampton
Current Institution: University of Southampton
Date of Award: 1988
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The lS1/2-2S1/2 transition frequency of atomic hydrogen has been measured by interferometric comparison with a reference line in 130Tea, tellurium. A dye laser, at 486nm was pulse amplified using a three-stage amplifier chain, transversely pumped with a Nd:YAG laser. The amplified light was spectrally filtered using a confocal interferometer and frequency doubled in area. The filter was frequency stabilised using an FM sideband technique to cw light acousto-optically upshifted in frequency to compensate for the 'amplifier shift'. Doppler- free two photon resonant, three photon ionization signals were detected. The value for the 1S1^2-2S1i2 transition frequency of 2466061407(9)MHz is in good agreement with the theoretical value of 2466061414.12(68)MHz. The lS1/2 Lamb shift can be inferred from this value and is 8180(9)MHz, agreeing within one standard deviation of other experiments and the theoretical value of 8172.94(9)MHz. Alternatively, a new value for the Rydberg constant of 109737.31542(40)cm~1 can be deduced. This value aiso agrees with the currently accepted value within one standard deviation.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: Atomic physics & molecular physics