A Precise Measurement of the Indium 6P1/2 Stark Shift Using Two-Step Laser Spectroscopy

Description
We have completed a measurement of the scalar polarizability of the 6P1/2 state of indium. Our results give a value of a0=7688+41(stat)+32(sys)a30, which is in statistical agreement with the theoretically predicted value. We lock a 410 nm laser to the 5P1/2 --> 6S1/2 transition and scan a 1343 nm laser across the 6S1/2 --> 6P1/2 transition, with the lasers passing through both an atomic beam and a vapor cell. We have developed a new method of locking the 410 nm laser directly to the atomic beam transition, and we use single-tone FM spectroscopy to obtain the necessary signal. We also detect the spectrum from the 6S1/2 --> 6P1/2 transition for a variety of applied electric fields in the atomic beam using two-tone FM spectroscopy. In the course of this experiment, we have also obtained a precise measurement of the hyperfine splitting of the 6P1/2 state of 1257.0(5) MHz, for which the uncertainty is dominated by systematic effects. This value is about three times more precise than the previous measurement.

In collections

File details
ID Label Size Mimetype Created
OBJ 2016_June_Carter_Allison_Thesis_Final_PHYS.pdf 2.82 MiB application/pdf 2017-04-07
TN TN 3.13 KiB image/jpeg 2017-04-07