References and Notes for Radon ( Rn )
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).
R30 E. Rasmussen, Z. Phys. 62, 494 (1930).
R33 E. Rasmussen, Z. Phys. 80, 726 (1933).