| Citation | Jackson, Derek Ainslie (Oxford). D.Sc. (Oxon). University Reader in Spectroscopy.
Distinguished for his work on the hyperfine structure of spectra. First calculated nuclear magnetic moments. (Proc. Roy. Soc., A. 121, 432, 1928). First successfully used the reflexion echelon grating employing new resonance lamp. (Proc. Roy. Soc. , A, 128, 508, 1930). From intensity determination derived the nuclear mechanical moments of indium, gallium, caesium. (Z. Phys. 75, 229, 1932, and 80, 59, 1933, and Proc. Roy. Soc. A., 148, 455, 1934). With H Kuhn perfiected the used of an atomic beam as spectral source, thus overcoming Doppler broadening and separating lines ten times closer together than had previously been possible. Investigated the hyperfine structure of potassium and sodium and both isotropes of silver by this method and determined their nuclear moments (Proc. Roy. Soc., A 148, 335, 1935, and 'Nature', 137, 1030, 1936, and Proc. Roy. Soc., in press). Found isotope shift in resonance line of Magnesium. (Proc. Roy. Soc., A, 154, 679, 1936) |