Exact quantum defect theory approach for lithium in magnetic fields

Exact quantum defect theory approach for lithium in magnetic fields
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磁场中锂的精确量子缺陷理论方法

DOI:
10.1088/1674-1056/22/1/013204
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发表时间:
2013
期刊:
影响因子:
1.7
通讯作者:
Liu, Hong-Ping
Liu, Hong-Ping
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Chen, Hai-Qing;Chen, Hai-Qing;Liu, Hong-Ping;Liu, Hong-Ping

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我们用精确量子亏损理论方法计算了锂原子在高激发态下的抗磁谱。所涉及的激发是从基态2s到高激发态np的单光子跃迁,分别具有π和σ偏振。锂在np态有一个很小的量子亏损值0:05,它的抗磁谱在接近电离极限的能量范围内与氢非常相似。然而,当能量低于-70 cm(-1)时,其光谱与氢的光谱有很大的差异。量子亏损的影响也讨论了斯塔克光谱。研究发现,由于与沟道ns的零相互作用,在电场中到np态的sigma跃迁具有与氢类似的行为。
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 pi and sigma 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 sigma transition to the np states in an electric field has a similar behavior to that of hydrogen due to zero interaction with channel ns.
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