The beryllium atom and beryllium positive ion in strong magnetic fields
The beryllium atom and beryllium positive ion in strong magnetic fields
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DOI：
10.1007/s100530170194
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发表时间：
2001-06-01
影响因子：
1.8
通讯作者：
Schmelcher, P
中科院分区：
文献类型：
--
作者：
Ivanov, MV;Schmelcher, P
铍原子在外部均匀磁场中的基态和一些激发态通过我们的 2D 网格 Hartree-Fock 方法计算，场强范围从 0 到 2.35 x 10(9) T。随着场强的变化，Be 原子的基态经历三个跃迁，涉及四种不同的电子配置，这些电子配置属于具有不同自旋投影 S-z = 0、-1、-2 的三组。对于弱场，基态构型源自 1s(2)2s(2)、S-z = 0 配置。随着场强的增加，基态演变成两种 S-z = -1 配置 1s(2)2s2p(-1) 和 1s(2)2p(-1)3d(-2)，然后是全自旋极化 S-z = -2 配置 1s2p(-1)3d(-2)4f(-3)。后一种构型形成铍原子在高场伽玛 > 4.567 的基态。 Be+ 离子的类似计算提供了以下三种基态配置的序列：1s(2)2s 和 1s(2)2p(-1) (S-z = -1/2) 和 1s2p(-1)3d(-2) (S-z = -3/2)。
The ground and a few excited states of the beryllium atom in external uniform magnetic fields are calculated by means of our 2D mesh Hartree-Fock method for field strengths ranging from zero up to 2.35 x 10(9) T. With changing field strength the ground state of the Be atom undergoes three transitions involving four different electronic configurations which belong to three groups with different spin projections S-z = 0, -1, -2. For weak fields the ground state configuration arises from the 1s(2)2s(2), S-z = 0 configuration. With increasing field strength the ground state evolves into the two S-z = -1 configurations 1s(2)2s2p(-1) and 1s(2)2p(-1)3d(-2), followed by the fully spin polarised S-z = -2 configuration 1s2p(-1)3d(-2)4f(-3). The latter configuration forms the ground state of the beryllium atom in the high field regime gamma > 4.567. The analogous calculations for the Be+ ion provide the sequence of the three following ground state configurations: 1s(2)2s and 1s(2)2p(-1) (S-z = -1/2) and 1s2p(-1)3d(-2) (S-z = -3/2).