Precision Measurement Of The 2^3P_1-to-2^3P_0 Fine Structure Of Atomic Helium Using Frequency-Offset Separated Oscillatory Fields

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dc.contributor.advisorEric A Hessels & Matthew C. George
dc.contributor.authorHeydarizadmotlagh, Farshad
dc.date.accessioned2025-07-23T15:22:08Z
dc.date.available2025-07-23T15:22:08Z
dc.date.copyright2025-05-20
dc.date.issued2025-07-23
dc.date.updated2025-07-23T15:22:07Z
dc.degree.disciplinePhysics And Astronomy
dc.degree.levelMaster's
dc.degree.nameMSc - Master of Science
dc.description.abstractIncreasing accuracy of the theory and experiment of the 2^3 P fine structure of helium has allowed for increasingly precise tests of quantum electrodynamics (QED), determinations of the fine-structure constant 𝛼, and limitations on possible beyond-the-Standard-Model physics. The work presented is a 2-part-per-billion (ppb) measurement of the 𝐽=1-to-𝐽=0 interval. The measurement is performed using the frequency-offset separated-oscillatory-fields (FOSOF) method. The result of 29 616 955 018(60) Hz represents a landmark for helium fine-structure measurements, and, for the first time, will allow for a 1-ppb determination of the fine-structure constant when QED theory for the interval is improved.
dc.identifier.urihttps://hdl.handle.net/10315/43055
dc.languageen
dc.rightsAuthor owns copyright, except where explicitly noted. Please contact the author directly with licensing requests.
dc.subjectPhysics
dc.subjectAtomic physics
dc.subjectQuantum physics
dc.subject.keywordsPhysics
dc.subject.keywordsQuantum physics
dc.subject.keywordsHelium
dc.subject.keywordsFine structure
dc.subject.keywordsFine-structure constant
dc.subject.keywordsAtomic physics
dc.subject.keywordsPrecision measurement
dc.subject.keywordsSpectroscopy
dc.subject.keywordsMicrowaves
dc.subject.keywordsSeparated oscillatory fields
dc.subject.keywordsFOSOF
dc.titlePrecision Measurement Of The 2^3P_1-to-2^3P_0 Fine Structure Of Atomic Helium Using Frequency-Offset Separated Oscillatory Fields
dc.typeElectronic Thesis or Dissertation

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