Decay curve study in a standard electron capture decay

Abstract

We have searched for a time-modulated decay in a standard electron capture experiment for 140Pr, in order to confirm a report from GSI, where an oscillatory decay has been observed for hydrogen-like 140Pr and 142Pm ions in the cooler storage ring. 140Pr has been produced with the 140Ce(p, n) reaction by a pulsed proton beam accelerated from the Van de Graaff accelerator at Osaka University. Resultant time dependence of the Kα and Kβ X-ray intensities from the daughter shows no oscillatory behavior. © 2010 American Institute of Physics.