在核物理学中,把原子核放出α粒子或β粒子变成新原子核的过程,称为原子核的衰变;原子核在其他粒子的轰击下产生新原子核的过程,称为核反应。无论是原子核衰变还是核反应原子核的质量数和电荷数都是守恒的,宏观的质量守恒定律、动量守恒定律、能的转化和守恒定律等同样是适 In nuclear physics, the process of releasing α particles or β particles into new nuclei is called the decaying of nuclei. The nucleus produces a new nucleus under the attack of other particles and is called the nuclear reaction. Both the atomic decay and nuclear reaction nuclear mass and the number of charges are conserved, macroscopic mass conservation law, the law of conservation of momentum, energy conversion and conservation laws are equally suitable