On the time–modulation of the K–shell electron capture decay of H-like 140Pr ions produced by neutrino mass differences
نویسنده
چکیده
According to recent experimental data at GSI, the rate of the number of daughter ions Ce, produced by the nuclear K–shell electron capture (EC) decay of the H–like ion Pr, is modulated in time with a period TEC = 7.06(8) sec and an amplitude aEC = 0.18(3). We show that this phenomenon can be explained by neutrino mass differences and derive a value for the difference of squared masses ∆m21 = m 2 2 − m 2 1 = 2.22(3) × 10 −4 eV. PACS: 12.15.Ff, 13.15.+g, 23.40.Bw, 26.65.+t
منابع مشابه
On the time–modulation of the K–shell electron capture decay of H-like 140Pr ions produced by neutrino–flavour mixing
According to recent experimental data at GSI, the rate of the number of daughter ions Ce, produced by the nuclear K–shell electron capture (EC) decay of the H–like ion Pr, is modulated in time with a period Td = 7.06(8) sec and an amplitude aEC = 0.18(3). We show that this phenomenon can be explained by neutrino– flavour mixing and derive a value for the quadratic mass difference ∆m21 = m 2 2 −...
متن کامل1 0 Fe b 20 08 Weak decays of H – like 140 Pr 58 + and He – like 140 Pr 57 + ions
The nuclear K–shell electron–capture (EC) and positron (β+) decay constants, λEC and λβ+ of H–like 140Pr and He–like 140Pr ions, measured recently in the ESR ion storage ring at GSI, were calculated using standard weak interaction theory. The calculated ratios R = λEC/λβ+ of the decay constants agree with the experimental values within an accuracy better than 3%. PACS: 12.15.Ff, 13.15.+g, 23.40...
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