# What is the half-life of Americium-242?

Americium-242 ($\text{^(242)"Am}$) has a half life of 16.02 hours . It decays to Curium-242 emitting ${\beta}^{-}$-particles and $\gamma$ photons.
The metastable variant of Americium-242 ($\text{^(242m)"Am}$) has a half-life of 141 years and emits $\alpha$-particles.