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A new fully quantum-mechanical method used to calculate the collisional broadening coefficients and shift coefficients of Rb D1 lines perturbed by noble gases He and Ar |
Wei Zhang(张伟), Yanchao Shi(史彦超), Bitao Hu(胡碧涛), Yi Zhang(张毅) |
School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China |
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Abstract In this work, a new full quantum method is proposed to calculate the broadening and shift coefficients of the D1 line in neutral collision. Based on the variable phase approach and Baranger theory, this method calculates the scattering phase shift instead of scattering matrix elements in order to simplify the calculation. As an illustration, this method is used to calculate the broadening and shift coefficients of the absorption lines of alkali metal atom Rb, as it collides with buffer gas He and Ar, in a temperature range from 150 K to 800 K. With a comparison with other calculations and experiment measurements, the reasonable agreements in all cases demonstrate the validity and simplicity of this method.
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Received: 01 April 2017
Revised: 11 September 2017
Accepted manuscript online:
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PACS:
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32.70.Jz
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(Line shapes, widths, and shifts)
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34.50.-s
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(Scattering of atoms and molecules)
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03.65.Nk
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(Scattering theory)
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Fund: Project supported by the National Natural Science Foundation of China (Grants Nos. 11405077 and 11575073). |
Corresponding Authors:
Yi Zhang
E-mail: yizhang@lzu.edu.cn
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Cite this article:
Wei Zhang(张伟), Yanchao Shi(史彦超), Bitao Hu(胡碧涛), Yi Zhang(张毅) A new fully quantum-mechanical method used to calculate the collisional broadening coefficients and shift coefficients of Rb D1 lines perturbed by noble gases He and Ar 2018 Chin. Phys. B 27 013201
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