249Bk half-life is 330 days. A solid kilogram of it would be a lot of decays in a small area. It would heat up close to its melting point before glowing bright

249Bk half-life is 330 days. A solid kilogram of it would be a lot of decays in a small area. It would heat up close to its melting point before glowing brightly enough in infrared to shed the heat as quickly as it's generated.