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Publication Date


First Advisor

Will Williams

Document Type

Honors Project

Degree Name

Bachelor of Arts




Lasers, Spectroscopy, Beryllium, Vacuum chambers, Physics, Atoms, Cesium, Cavity, Optical bloch equations, Optics, QED, Pound-Drever-Hall locks, Sub-Doppler spectroscopy, Saturated absorption spectroscopy, Hyperfine structure, Fitting algorithms, Beryllium-Spectra, Laser spectroscopy, Absorption spectra, Quantum electrodynamics


We report on the calibration and absolute frequency results for the 2s2p1P1 state in neutral atomic beryllium-9. We start off with a discussion of the method used to calibrate the laser, which includes a detailed explanation of the basic physics involved, and then discuss the results for the lowest singlet state in neutral beryllium-9. We discuss a way to predict the spectra using optical Bloch equations and then present and analyze the experimental results. We found the absolute frequency for the 1P1 state to be 42565.4487(30) cm-1, which is in agreement with the current best theoretical estimateof42565.441(11)cm-1 [49]. Amoresophisticatedanalyticaltechniqueisproposed; however, more studies need to be done to develop the complete uncertainty model. A proposed method to perform spectroscopy on another singlet state in beryllium is also presented.


2018 Alisha Daya Vira. Access limited to the Smith College community and other researchers while on campus. Smith College community members also may access from off-campus using a Smith College log-in. Other off-campus researchers may request a copy through Interlibrary Loan for personal use.




148 pages : illustrations (some color) Includes bibliographical references (pages 143-148)