Search for bound-state electron+positron pair decay

Abstract

the heavy ion storage rings coupled to in-flight radioactive-ion beam facilities, namely the ability to produce and store for extended periods of time radioactive nuclides in high atomic charge states, for the search of yet unobserved decay modebound-state electron-positron pair decay.

Studies at the border between nuclear and atomic physics: Weak decays of highly charged ions

“…The future scientific programs are rich and include investigations of exotic decay channels such as two-photon and internal pair de-excitation [115], bound electron-positron decays [116], nuclear excitations by electron capture or electron transitions [117], α-decays [118], as well as EC decay of lithium-like ions and forbidden EC decays [82,85]. Last but not least, proton and neutron radioactivity as well as β-delayed particle emission [119] are interesting topics.…”

Electroweak Decays of Highly Charged Ions

“…Heavy-ion storage-cooler rings have proven to be excellent tools for performing highprecision decay experiments on HCRs. There are many ideas for unique investigations of decays of HCRs which guarantee the rich perspectives of the field, see [112,116,[138][139][140][141][142].…”

Precision Physics with Stored Exotic Ions: Storage Ring Mass Spectrometry

“…Through the development of the I+SMS, simultaneous mass and lifetime measurements are now enabled. The technique has been verified in the ESR and successfully employed to measure the two-photon de-excitation of the first exited 0 + state in 72 Ge [86,87].…”