Abstract
The hyperfine spectrum of 38−y207Bi in the 6p34S3/2−6p2(3P0)7s4P1/2 3,067-A resonance line was measured by absorption spectroscopy. The207Bi−209Bi isotope shift is 0.0999(20) cm−1. The relative isotope shifts in bismuth are found to follow the general pattern of the even-neutron number isotopes for the isotones withZ=80, 81, 82 and 87. The magnetic dipole and electric quadrupole hfs interaction constants for207Bi,A(4P1/2) =0.1630(3) cm−1 andB(4S3/2)=−0.016(3) cm−1, were obtained. Except for the isotope shift, these more precise values are in agreement with our previous results.
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