With important contributions from many Williams undergraduates over recent years, we have completed a series of high-precision spectroscopic measurements in Group III and IV atoms such as thallium, indium and lead. These results test state-of-the art theoretical models of these complicated atoms and guide further refinement. I will discuss some recent results including a new precision measurement of a “forbidden” transition in lead which makes use of a laser polarimetry technique capable of microradian optical rotation resolution. Improved models of these heavy atoms aid in the bigger goals of testing the Standard Model (and beyond) with table-top atomic and laser physics experiments.
Born in Iraq, Ibrahim Kazerooni was imprisoned under Saddam Hussein's regime and eventually fled the country in fear of Iraq's secret police. He completed theological studies in both Iran and Iraq, and also holds degrees in engineering, management and international relations, and a joint Ph.D. in religion and social change. He is the Imam of the Islamic Center of America in Dearborn, Mich.
An Interfaith Harmony Week offering from the Office of Religious and Spiritual Life