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According to experimental data at GSI, the rates of the number of daughterions, produced by the nuclear K-shell electron capture (EC) decays of theH-like 140Pr58+, 142Pm60+ and 122I52+ ions, are modulated in time with periodsT_{EC} of the order of a few seconds, obeying an A-scaling T_{EC} = A/20 s,where A is the mass number of the mother nuclei, and with amplitudes a^{EC}_d ~0.21. In turn, the positron decay mode of the H-like 142Pm60+ ions showed notime modulation of the decay rates. As has been shown in Phys. Rev. Lett. 103,062502 (2009) and Phys. Rev. Lett. 101, 182501 (2008), these data can beexplained by the interference of two massive neutrino mass-eigenstates. In thisletter we give a reply on the comments on our paper Phys. Rev. Lett. 103,062502 (2009) by A. Gal (arXiv:0809.1213v2).

Time Modulation of Orbital Electron Capture Decays of H-like Heavy Ions