Spectroscopy and scattering matrices with nitrogen atom: Rydberg states and optical oscillator strengths

doi:10.1088/1674-1056/ac1f05

Abstract The scattering matrices of ${\rm e}+ {\rm N}^{+}$ with $J^\pi=1.5^{+}$ in discrete energy regions are calculated using the eigenchannel R-matrix method. We obtain good parameters of multichannel quantum defect theory (MQDT) that vary smoothly as the function of the energy resulting from the analytical continuation property of the scattering matrices. By employing the MQDT, all discrete energy levels for N could be calculated accurately without missing anyone. The MQDT parameters (i.e., scattering matrices) can be calibrated with the available precise spectroscopy values. In this work, the optical oscillator strengths for the transition between the ground state and Rydberg series are obtained, which provide rich data for the diagnostic analysis of plasma.

Keywords: eigenchannel R-matrix oscillator strengths

Received: 14 June 2021
Revised: 15 August 2021
Accepted manuscript online: 19 August 2021

PACS:	31.15.ae	(Electronic structure and bonding characteristics)
	31.15.ag	(Excitation energies and lifetimes; oscillator strengths)

Fund: Project supported by the Science Challenge Project (Grant No. TZ2016005), the National Key Research and Development Program of China (Grant Nos. 2017YFA0403200 and 2017YFA0402300), and the CAEP Foundation (Grant No. CX2019022). We thank the Institute of Applied Physics and Computational Mathematics for the supercomputing source.

Corresponding Authors: Yuhao Zhu, Yong Wu
E-mail: zhu_yuhao@foxmail.com;wu_yong@iapcm.ac.cn

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Yuhao Zhu(朱宇豪), Rui Jin(金锐), Yong Wu(吴勇), and Jianguo Wang(王建国) Spectroscopy and scattering matrices with nitrogen atom: Rydberg states and optical oscillator strengths 2022 Chin. Phys. B 31 043103

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Spectroscopy and scattering matrices with nitrogen atom: Rydberg states and optical oscillator strengths

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