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High-precision measurements of electric-dipole-transition amplitudes in excited states of ${}^{208}{Pb}$ using Faraday rotation spectroscopy

https://doi.org/10.1103/PhysRevA.111.042808

Lacy, John_H; Kinney, Abby_C; Majumder, P_K (April 2025, Physical Review A)
Broadband High-Precision Faraday Rotation Spectroscopy with Uniaxial Single Crystal CeF3 Modulator

https://doi.org/10.3390/photonics11040304

Lacy, John H; Patenotte, Gabriel E; Kinney, Abby C; Majumder, Protik K (April 2024, Photonics)

We present a low-noise (<10 µrad/Hz) broadband Faraday Rotation Spectroscopy method which is feasible for near-ultraviolet through near-infrared wavelengths. We demonstrate this in the context of a high-precision spectroscopy experiment using a heated Pb vapor cell and two different lasers, one in the UV (368 nm) and a second in the IR (1279 nm). A key element of the experimental technique is the use of a uniaxial single crystal CeF3 Faraday modulator with excellent transmission and optical rotation properties across the aforementioned wavelength range. Polarimeter performance is assessed as a function of crystal orientation and alignment, AC modulation amplitude, laser power, and laser wavelength. Crystal-induced distortion of the (6p2)3P0→(6p2)3P1 (1279 nm) and (6p2)3P1→(6p7s)3P0 (368 nm) spectral lines due to misalignment-induced birefringence is discussed and modeled using the Jones calculus.
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High-precision measurement and ab initio calculation of the $(6 s^{2} 6 p^{2})^{3} P_{0} \to^{3} P_{2}$ electric-quadrupole-transition amplitude in ${}^{208}{Pb}$

https://doi.org/10.1103/PhysRevA.100.052506

Maser, Daniel L.; Hoenig, Eli; Wang, B.-Y.; Rupasinghe, P. M.; Porsev, S. G.; Safronova, M. S.; Majumder, P. K. (November 2019, Physical Review A)

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