Hyperfine splitting and broadening have been measured for seven doublet series laser lines between the 2s22p4 (3P)3p and 2s22p4(3P)3s configurations of fluorine, allowing for unambiguous determination of the hyperfine splittings in these levels. The broadening is shown to be a strong indication that the upper-level fluorine atoms are remnants of dissociative states of HeF.
© 1978 Optical Society of America
L. O. Hocker, "High-resolution study of the helium-fluorine laser," J. Opt. Soc. Am. 68, 262-265 (1978)