Abstract

The hyperfine structure of Hg197* was measured with greater accuracy than had been obtained in conventional spectroscopic work. The nuclear magnetic dipole and electric quadrupole interaction constants, A and B, were calculated: A=−2328.8±1.7 Mc/sec; B=−901±13 Mc/sec. The isotope shift is 2240±130 Mc/sec relative to Hg198. An electronic g value of 1.4861±0.00036 was found for the 3P1 level.

The data were gathered with the use of level-crossing, double-resonance, and magnetic scanning techniques. The relatively new level-crossing experiment was applied to Hg199 and Hg197.

The measurements reported here are useful in two ways: They lead to values of the nuclear moments and estimates of the nuclear charge distribution, and they pave the way for more accurate experiments that will yield data on the distribution of the nuclear magnetization.

© 1961 Optical Society of America

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