Beiersdorfer, P Hyperfine splitting of the 2s1/2 and 2p1/2 levels in Li- and be-like ions of (59)(141) Pr. [electronic resource] - Physical review letters Jun 2014 - 233003 p. digital Publication Type: Journal Article ISSN: 1079-7114 Standard No.: 10.1103/PhysRevLett.112.233003 doi