Radium (Ra)
References and Notes for Radium ( Ra )
AWT80 J. A. Armstrong, J. J. Wynne, and F. S. Tomkins, J. Phys. B 13, L133 (1980).
M58 C. E. Moore, Atomic Energy Levels, Natl. Bur. Stand. (U.S.) Circ. 467. Vol. III (1958); reprinted as Natl. Stand. Ref. Data Ser., Natl. Bur. Stand. (U.S.) 35 (1971).
R34a E. Rasmussen, Z. Phys. 86, 24 (1934).
R34b E. Rasmussen, Z. Phys. 87, 607 (1934).