Thallium204
Thallium-204 is a radioactive isotope of thallium. It has a half-life of 3.78 years. Thallium-204 decays primarily by beta emission to lead-204. It can also undergo electron capture to mercury-204, although this is a less common decay mode. Thallium-204 is produced artificially, typically as a byproduct of nuclear fission or through neutron activation of thallium isotopes. Its applications are limited due to its radioactivity and toxicity. Historically, radioactive isotopes like thallium-204 have been investigated for use in certain industrial gauging and tracing applications, but its specific role in modern industry is not widespread. Due to the inherent toxicity of thallium compounds, handling of thallium-204 requires strict safety precautions to prevent contamination and exposure. The decay products of thallium-204 are stable isotopes.