Searching for symmetry violations with radioactive molecules

The Universe's matter-antimatter imbalance (baryogenesis) and the absence of charge conjugation and parity (CP) violation in strong interactions (the strong CP problem) are leading motivations to search for time reversal symmetry violation (TSV). Constraining TSV in nuclei and nucleons is intriguing, as such an experiment is sensitive to physics that addresses both problems through underlying hadronic interactions. Heavy elements are a natural choice for such experiments, because sensitivity scales as the atomic number cubed. Radium is such a heavy element, but it comes with an additional enhancement to TSV: a nucleus that has an octupole deformation. The enhancement can be further augmented by incorporating radium into a molecule. We discuss our work towards an experiment which aims to use a single radium-bearing molecular ion to constrain sources of TSV.