Exact quantum defect theory approach for lithium in magnetic fields

doi:10.1088/1674-1056/22/1/013204

Abstract We calculate the diamagnetic spectrum of lithium at highly excited states up to the positive energy range using the exact quantum defect theory approach. The concerned excitation is one-photon transition from the ground state 2s to the highly excited states np with π and σ polarizations respectively. Lithium has a small quantum defect value 0.05 for the np states, and its diamagnetic spectrum is very similar to that of hydrogen in the energy range approaching the ionization limit. However, a careful calculation shows that the spectrum has a significant discrepancy with that of hydrogen when the energy is lower than -70 cm^-1. The effect of the quantum defect is also discussed for the Stark spectrum. It is found that the σ transition to the np states in an electric field has a similar hydrogen behavior due to the zero interaction with channel ns.

Keywords: diamagnetic spectrum quantum defect theory

Received: 11 May 2012
Revised: 27 May 2012
Accepted manuscript online:

PACS:	32.60.+i	(Zeeman and Stark effects)
	32.30.Jc	(Visible and ultraviolet spectra)
	31.15.-p	(Calculations and mathematical techniques in atomic and molecular physics)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11174329 and 91121005) and the National Basic Research Program of China (Grant No. 2013CB922003).

Corresponding Authors: Liu Hong-Ping
E-mail: liuhongping@wipm.ac.cn

Cite this article:

Xu Jia-Kun (徐家坤), Chen Hai-Qing (陈海清), Liu Hong-Ping (刘红平) Exact quantum defect theory approach for lithium in magnetic fields 2013 Chin. Phys. B 22 013204

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Exact quantum defect theory approach for lithium in magnetic fields

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