Why the half life of radioisotope is less than actual half life

It appears that the half life of a disintegration is also affected by Relativity.
At the South Pole, as done by experiments with Fe, the half life is different.
Similarly for at velocity. Albert was right!


Surely, by definition, the half life is the half life, and cannot be less than itself.

Further improved. From a plain English point of view, the sentence just above is perfectly true.
What relativity does to the experiment, is to alter the half life to a new value. Thus the half life value in Washington may be say 20 min. Travelling at a different velocity however, it may have a different value, say 19.5 min.
For an analogous experiment, consider the behaviour of atomic clocks on the GPS stations buzzing about above. Their 'atomic vibrations' are affected by two relativistic effects. Firstly, because of their velocity (Relativistic). Secondly, because of the smaller effect of gravity (General). This is well reported in the literature. The effects are less than 50 microseconds per day. Out at one-half Earth radius (which is a bit low for a satellite), the gravitational (General) and Relativistic effects apparently would equal and cancel out. If you search for GPS+"relativistic effect" you'll get more math than I can comfortably handle.