Measurement by Fourier spectroscopy of the hyperfine structure of the lines λ=11522 Å (2s2to 2p4) and λ=15234 Å (2s2to 2p1) of neon (21Ne)

Abstract
The values of the A and B hyperfine structure constants for the 2s2 and 2p4 levels of 21Ne have been measured using Fourier transform spectroscopy. In addition it is found that the centre of gravity for the 21Ne line lies between the 20Ne and 22Ne components in agreement with the isotope shift theory.