Work

Electron-capture decay of Tc 98

Year: 2025

Type: article

Abstract: From simple symmetry and energy considerations it can be concluded that Tc 98 might undergo electron capture decay (EC). In this work we provide evidence for an EC decay of Tc 98 measuring 2.67 g K [ Tc O 4 ] that contains approximately 1 GBq of Tc 99 . By use of a lead shielding for the sample, it was possible to identify the coincident 4 + → 2 + and 2 + → 0 + γ transitions in the daughter nuclide Mo 98 at the University of Cologne's Cologne Clover Counting setup of the Institute for Nuclear Physics. For the first time, the EC/ β − branching ratio of 0.29(3)% was determined directly. With a log f t of 14.21(7) this decay does almost tie with the log f t of the Cl 36 EC decay [14.23(1)] for the same highest second forbidden nonunique transition.

Source: Physical Review C

DOI: 10.1103/y5d7-85w5

Authors: Dominik Elchine, Martin Müller, Markus Schiffer, Erik Strub

Institution: University of Cologne

Language: English

Topic: Nuclear physics research studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funder: Deutsche Forschungsgemeinschaft

Award: G3356568826