Author/Authors :
Eric B. Norman، نويسنده , , Bhaskar Sur، نويسنده , , K.T. Lesko، نويسنده , , Ruth-Mary Larimer، نويسنده , , Donald J. DePaolo، نويسنده , , Thomas L. Owens، نويسنده ,
Abstract :
We have compared the decay rate of freshly prepared 40K to that of 40K that is >4.5 × 109 years old. We find that to within the experimental uncertainly of ± 11%, the decay rates are the same. This indicates that the exponential nature of the decay law is valid down to time-scales of approximately 10−10 t12.
