However, radioactivity of this nuclear isomer has never been observed, and only a lower limit on its half life of 2.0 × 10 16 years has been set.
Only a lower limit on its half life of 2.0 x 10 16 years has been set. However, radioactivity of this nuclear isomer has never been observed.
However, radioactivity of this nuclear isomer has never been observed. Only a lower limit on its half life of 2.0 x 10 16 years has been set.
However, radioactivity of this nuclear isomer has never been observed. Only a lower limit on its half life of 2.0 x 10 16 years has been set.