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Calculation of helium 1D—3D term intervals for 1snd(n=4—11) states

He Li-Ming Cao Wei Chen Xue-Qian Zhu Yun-Xia

Calculation of helium 1D—3D term intervals for 1snd(n=4—11) states

He Li-Ming, Cao Wei, Chen Xue-Qian, Zhu Yun-Xia
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  • Abstract views:  2665
  • PDF Downloads:  635
  • Cited By: 0
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  • Received Date:  04 March 2005
  • Accepted Date:  15 April 2005
  • Published Online:  20 November 2005

Calculation of helium 1D—3D term intervals for 1snd(n=4—11) states

  • 1. 华东理工大学物理系,上海 200237

Abstract: With many-body perturbation theory (MBPT), 1D—3D term intervals of helium 1snd(n=4—11) configurations have been calculated. Based on two different models, Rayleigh-Schrdinger perturbation expansion terms only consisting of bound states and those of continua are calculated respectively. For bound states, the zeroth-order wave functions are strictly generated from self-iteration solutions of Hartree equation and residues of infinite perturbation series are dealt with by integral processing method. For continuum parts, a simplified hydrogen potential model is adopted. According to Rayleigh-Schrdinger expansion, the perturbation corrections to Rydberg states have been evaluated up to the third-order terms. From the calculation, the energy splittings are mainly attributed to bound parts. Singlet-triplet level splittings yielded here are found to agree quite well with two sets of experimental results.

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