氢分子在磁场中回归谱的散射矩阵理论研究

利用散射矩阵理论,结合扩展的半经典闭合轨道理论和多通道量子亏损理论,计算了磁场中高里德堡H2分子的回归谱.该方法使用了两个空间散射矩阵来描述里德堡电子的动力学性质,计算中可以包括所有阶的实散射的作用.回归谱的每一个尖峰对应着一条闭合轨道,新的额外峰是由于弹性散射和非弹性散射所引起的通道内和通道间的轨道组合,进一步证明了体系通道间和通道内的散射具有同等的重要性.

Study on the scattering matrix of the recurrence spectra of H_2 molecules in magnetic field

Using the scattering matrix and combining the quantum defects theory with the extended closed-orbit theory, the recurrence spectra of H2 molecules in strong external magnetic field is investigated. This method uses two distinct spatial scattering matrices to describe the Rydberg electron's motion exactly and the result can be analytically resumed to include all orders of core-scattering automatically. The quantum resonance peaks are intimately related to the corresponding closed orbits and the new extra peaks in spectra are attributed to the combined recurrences of semiclassical closed orbits which arise from the influence of elastic scattering and inelastic scattering. It is demonstrated that the interchannel scattering and the intrachannel scattering are equivalently important.