原子核与激光的相互作用(一)——激光引起的同质异能态衰变和γLaser

INTERACTIONS OF NUCLEI AND LASER(1)——LASER INDUCED ISOMERIC TRANSITIONS AND GAMMA LASER

用参量化的方法推导了激光引起的原子核同质异能态共振跃迁的几率,并考虑了激光频率宽度的效应.进而研究了基于以下概念发展γ激光器的可能性:即用强的可见光激光将长寿命的同质异能素转换到能量上近似兼并的短寿命同质异能素,并使后者达到粒子数反转.在分析了同质异能态的粒子占有数随时间变化的基础上,数值计算了这一途径所需要的激光强度.

Laser induced nuclear transitions between isomeric states were calculated by a parametrization approach. The effect of laser linewidth were taken into account. Based on the calculated transition probabilities, laser stimulated conversion from long to short lifetime states was studied. The kossibility of changing the lifetime of the long-lived isomers and developing gamma-ray laser is discussed. Numerical evaluations show that the laser intensity required to develop gamma-ray laser in this approach is higher than that available at nowdays technology.