Stable He- can exist in a strong magnetic field.
Stable He- can exist in a strong magnetic field.
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DOI：
10.1103/physrevlett.111.163003
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发表时间：
2013-07
影响因子：
8.6
通讯作者：
A. Turbiner;J. C. Lopez Vieyra
中科院分区：
文献类型：
--
作者：
A. Turbiner;J. C. Lopez Vieyra
利用变分法研究了磁场B中系统（α，e，e，e）束缚态的存在性.结果表明，对于B，α = 0.13 a.u.这个系统的总能量低于（α，e，e）系统的总能量。它表明了稳定的He原子离子的存在.它的基态是一个自旋二重态2（-1）+，在0.74 a.u.<$B <$0.13 a.u.并且对于更大的磁场它变成自旋四重态4（-3）+。对于0.8 a.u.，B ≤ 0.7 a.u. He-离子具有两个（稳定）束缚态2（-1）+和4（-3）+。
The existence of bound states of the system (α, e, e, e) in a magnetic field B is studied using the variational method. It is shown that for B≳0.13 a.u. this system gets bound with total energy below the one of the (α, e, e) system. It manifests the existence of the stable He- atomic ion. Its ground state is a spin doublet 2(-1)+ at 0.74 a.u.≳B≳0.13 a.u. and it becomes a spin quartet 4(-3)+ for larger magnetic fields. For 0.8 a.u.≳B≳0.7 a.u. the He- ion has two (stable) bound states 2(-1)+ and 4(-3)+.