A study of the spectrum of natural dysprosium with the laser-atomic-beam technique. I. Isotope shifts

Abstract
A high resolution study of 31 transitions in dysprosium in the wavelength regions 435-470 nm and 560-670 nm has been performed using CW dye lasers and a collimated atomic beam. Transitions from the 5I8 ground state as well as from the metastable states at 4134 cm-1 (5I7) 7050 cm-1 (5I6) of the 4f106s2 5I multiplet were studied. The results of isotope shift measurements on transitions to the excited-state configurations 4f106s6p, 4f96s25d, 4f96s5d2 are presented and values for the specific mass shift and atomic factor of the field shift for the various configurations are evaluated.