Improved measurement of the hyperfine structure of the laser cooling level $4f^{12}{(}^3{H}_6)5d_{5/2}6s^2$ $(J=9/2)$ in ${}^{169}$Tm

S. A. Fedorov, G. A. Vishnyakova, E. S. Kalganova +7

We report on the improved measurement of the hyperfine structure of $4f^{12}{(}^3{H}_6)5d_{5/2}6s^2$ $(J=9/2)$ excited state in Tm-169 which is involved in the second-stage laser cool…