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Abstract

Bound-state β⁻-decay is an exotic decay mode that produces temperature-dependent stability in nuclei. A striking example is ²⁰⁵Tl, in part because of its impact on the ²⁰⁵Pb/²⁰⁴Pb cosmochronometer—a short-lived radionuclide clock that can provide unique constraints on s process material in the early solar system. The bound-state β⁻-decay of ²⁰⁵Tl was measured at GSI, where fully stripped ²⁰⁵Tl⁸¹⁺ ions were produced and stored in the Experimental Storage Ring. Decay occurred during storage producing increased ²⁰⁵Pb daughters with increased storage time. This contribution briefly outlines the experiment and describes analytical corrections required to extract the half-life.