【摘要】 用分子的内坐标给出的动能加上用动力学代数方法给出的用内坐标表示的分子势能得出对称三原子分子的总的能量表达式,给出了时间演化算子并计算了对称三原子分子在强激光场中振动激发.作为例子,计算了H2O分子在频率wF=3652 cm-1的激光场中的激发,通过讨论可以发现H2O在激光场中的跃迁几率随时间的变化是周期性的,水分子从激光场中吸收的能量由吸收的平均光子数确定,被吸收的平均光子数随时间的变化也是周期性的.更多还原

【Abstract】 We get the Hamiltonian of the symmetrical triatomic molecules with kinetic energy given by the inner coordinates and the potential energy got by the dynamical Lie algebraic method.We calculated the time evolution operators and discussed the multiphoton vibration excitation of symmetrical triatomic molecules in intense laser fields.For an example,we calculated the change of the transition probability and the average photon number at wF= 3652 cm-1absorbed from the external fields of H2 O molecule with time.The results expressed that the transition rate of H2 O in the laser field with time is periodic,the absorption energy of H2 O molecules from the laser field is determined by the absorbing average photon number,the absorbing average photon number’s changes over time is also periodic.更多还原