<p>Tracking the dynamic behavior of electrons produced by the decay of radioactive nuclides is an important and challenging issue. The time-dependent property of laser fields can be used to track the collision and exchange processes between emitted electrons (generated by ⁹⁰Sr decay) and electrons in the plasma. It is found that the emitted electrons can contribute to the plasma’s stability. That is to say the emitted electrons can not only serve as supplements to enter the plasma to compensate for the loss of ionized electrons caused by collisions and recombination, but also provide energy to the plasma through collisions with positive ions. This article not only provides the conditions for high-frequency collisions to occur, but also, by analyzing the distribution of collision probability, gives the time when the maximum collision probability occurs, as well as the exact numerical value of plasma energy in a very short period of rapid increase.</p>