Probing Internal Conversion and Dark-Matter-Induced De-excitation of 180mTa with a gamma-ray TES Array

A. Gando, K. Ichimura, K. Ishidoshiro +5

We propose and evaluate a source-as-detector search for the de-excitation of the long-lived isomer ${}^{180\mathrm{m}}\mathrm{Ta}$ in natural tantalum (Ta), using a $\gamma$-ray transitio…