Abstract
While the hyperfine structure of the arc spectrum of mercury has been satisfactorily interpreted on the basis of nuclear spin and isotope shift, analysis of the spark lines has not progressed possibly because most of the significant lines lie in the ultra-violet region. Schuler and his collabo¬rators' and. Murakawa2 have computed the even isotope shift in the level 5d9 6s 2D512, and the latter author has given a tentative level scheme for A 3981 A. In the cases of thallium and lead it has been found that the spark line analysis gives g(I) values agreeing with those obtained from a study of the arc lines. The present paper is concerned with the hyperfine structure study of some prominent mercury spark lines in the ultra-violet.
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