Isotope shift and hyperfine structure in the spectrum of tellurium

Abstract

With the use of enriched samples of the stable isotopes of tellurium, the isotope shifts in the spark line 4049 A were studied. Fabry-Perot fringes due to this line were measured against a mercury reference line; also the hyperline structures of the odd isotopes were measured. The shifts in the even isotopes are com pared with those in adjacent elements and discussed in term s of nuclear deformation. The odd-even staggering was found to be extremely large in tellurium . The ratio of the widths of the hyperfine structures of the isotopes 123 and 125 agrees, within the experimental limits of error of about 1 %, with the ratio of the nuclear magnetic moments.