Weak decays of H-like 140Pr58+ and He-like 140Pr57+ ions
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The nuclear K-shell electron-capture (EC)and positron (beta+) decay constants, lambda_(EC) and lambda_(beta^+) of H-like 140Pr58+ and He-like 140Pr57+ ions, measured recently in the ESR ion storage ring at GSI, were calculated using standard weak interaction theory. The calculated ratios R = lambda_(EC)/lambda_(beta^+) of the decay constants agree with the experimental values within an accuracy better than 3 %.
Latex 14 pages, no figures, we have corrected some references, discussed in more detail the ratio of the EC-decay constants of the H-like and He-like ions and added Appendices with the detailed calculations of the weak decay constants
Latex 14 pages, no figures, we have corrected some references, discussed in more detail the ratio of the EC-decay constants of the H-like and He-like ions and added Appendices with the detailed calculations of the weak decay constants