Detection of missing low-lying atomic states in actinium
Abstract
Two lowest-energy odd-parity atomic levels of actinium, 7s^27p 2P^o_1/2, 7s^27p 2P^o_3/2, were observed via two-step resonant laser-ionization spectroscopy and their respective energies were measured to be 7477.36(4) cm^-1 and 12 276.59(2) cm^-1. The lifetimes of these states were determined as 668(11) ns and 255(7) ns, respectively. In addition, these properties were calculated using a hybrid approach that combines configuration interaction and coupled-cluster methods in good agreement. The data are of relevance for understanding the complex atomic spectra of actinides and for developing efficient laser-cooling and ionization schemes for actinium, with possible applications for high-purity medicalisotope production and future fundamental physics experiments with this atom.
Cite
@article{arxiv.2005.03713,
title = {Detection of missing low-lying atomic states in actinium},
author = {Ke Zhang and Dominik Studer and Felix Weber and Vadim M. Gadelshin and Nina Kneip and Sebastian Raeder and Dmitry Budker and Klaus Wendt and Tom Kieck and Sergey G. Porsev and Charles Cheung and Marianna S. Safronova and Mikhail G. Kozlov},
journal= {arXiv preprint arXiv:2005.03713},
year = {2020}
}
Comments
6pages, 5figures