First-Forbidden Continuum- and Bound-State beta- -Decay Rates of Bare 205Hg80+ and 207Tl81+ Ions
Abstract
We calculate the decay rates lambda(beta-c) and lambda(beta-b) of the continuum- and bound-state beta- decays for bare 205Hg80+ and 207Tl81+ ions. For the ratio of the decay rates R(b/c) = lambda(beta-b)/lambda(beta-c) we obtain the values R(b/c) = 0.161 and R(b/c) = 0.190 for bare 205Hg80+ and 207Tl81+ ions, respectively. The theoretical value of the ratio R(b/c) = 0.190 for the decays of 207Tl81+ agrees within 1% of accuracy with the experimental data Rexp(b/c) = 0.188(18), obtained at GSI. The theoretical ratio R(b/c) = 0.161 for 205Hg80+ is about 20% smaller than the experimental value Rexp(b/c) = 0.20(2), measured recently at GSI.
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