Generation of high-purity, low-temperature samples of ${}^{39}$K for applications in metrology

L. Antoni-Micollier, B. Barrett, L. Chichet +4

We present an all optical technique to prepare a sample of ${}^{39}$K in a magnetically-insensitive state with 95\% purity while maintaining a temperature of 6 $\mu$K. This versatile p…