The decayThe spontaneous conversion of a nuclide into another nuclide... constant of radioactive decayThe spontaneous conversion of a nuclide into another nuclide... is equal to the reciprocal value of the average life time . Between the decayThe spontaneous conversion of a nuclide into another nuclide... constant , the medium life time and the half-lifeThe period during which half of the nuclei decay in a quanti... T the following relations exists: