D.
Studer
Zhang, K. ., Studer, D. ., Weber, F. ., Gadelshin, V. M., Kneip, N. ., Raeder, S. ., … Kozlov, M. G. (2020). Detection of the Lowest-Lying Odd-Parity Atomic Levels in Actinium. Physical Review Letters, 125. http://doi.org/10.1103/PhysRevLett.125.073001