Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2009-07-14
Phys.Rev.C84:014301,2011
Physics
Nuclear Physics
Nuclear Theory
Scientific paper
10.1103/PhysRevC.84.014301
Modulated in time orbital electron capture (EC) decays have been observed recently in stored H-like $^{140}$Pr$^{58+}$ and $^{142}$Pm$^{60+}$ ions. Although, the experimental results are extensively discussed in literature, a firm interpretation has still to be established. Periodic transitions between the hyperfine states could possible lead to the observed effect. Both selected nuclides decay to stable daughter nuclei via allowed Gamow-Teller transitions. Due to the conservation of total angular momentum, the allowed EC decay can only proceed from the hyperfine ground state of parent ions. In this work we argue that periodic transitions to the excited hyperfine state (sterile) in respect to the allowed EC decay ground state cannot explain the observed decay pattern.
Bosch Fritz
Geissel Hans
Litvinov Yuri A.
Patyk Zygmunt
Siegien-Iwaniuk Katarzyna
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