Core effect on the diamagnetic spectrum of barium Rydberg states
Core effect on the diamagnetic spectrum of barium Rydberg states
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钡里德伯态抗磁谱的核心效应
DOI：
10.1103/physreva.85.032508
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发表时间：
2012-03
影响因子：
2.9
通讯作者：
Liu, H. P.
中科院分区：
文献类型：
--
作者：
Liu, X. J.;Liu, X. J.;Liu, H. P.;Liu, H. P.
通过从基态6s(2) S-1(0)的单光子跃迁实验和理论研究了非氢碱土金属钡在其抗磁谱中的核心效应。与氢相比，离子核的非库仑势引入了额外的能量位移和不同n流形之间的能级反交，其特征是相关角动量态的量子缺陷。利用复旋转坐标技术和b样条展开方法，我们建立了一个基于有效势的矩阵形式哈密顿量，将角相关量子缺陷纳入角旋转项。通过在计算中扫描不同通道的量子缺陷来研究非氢核效应。结果表明，p态和f态的量子缺陷对谱线的强度和位置有不可否认的影响，尽管钡在所检测的能量范围内与氢非常接近。通过理论计算，确定了抗交叉谱线。计算结果与实验观测结果吻合较好。
We study the core effect of nonhydrogenic alkaline-earth-metal barium in its diamagnetic spectrum by one photon transition from the ground state 6s(2) S-1(0) experimentally and theoretically. The non-Coulombic potential of the ion core introduces an extra energy shift compared with hydrogen and a level anticrossing between different n manifolds, characterized by the quantum defect of the concerned angular momentum states. With a complex rotation coordinate technique and a B-spline expansion method, we develop a matrix-form Hamiltonian based on an effective potential incorporating the angular-dependent quantum defect into the angular rotation term. The nonhydrogen core effects are investigated by sweeping the quantum defects of different channels in the calculation. Results show that quantum defects of p and f states have a undeniable effect on the intensities and positions of the spectral lines, although barium is closely hydrogenlike in the energy range examined. The anticrossing spectral lines are also identified with the aid of theoretical calculations. The calculations are in good agreement with the experimental observations.
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DOI：
10.1103/physreva.34.2952
发表时间：
1986-10
期刊：
Physical review. A, General physics
影响因子：
--
作者：
Stoneman;Janík;Gallagher
通讯作者：
Stoneman;Janík;Gallagher
DOI：
10.1098/rspa.1980.0143
发表时间：
1980-11
期刊：
Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences
影响因子：
--
作者：
W. Garton;F. Tomkins;H. Crosswhite
通讯作者：
W. Garton;F. Tomkins;H. Crosswhite
影响因子：
2.9
作者：
M. Aymar;P. Camus;M. Dieulin;C. Morillon
通讯作者：
M. Aymar;P. Camus;M. Dieulin;C. Morillon
DOI：
10.1088/0953-4075/30/16/004
发表时间：
1997-08
期刊：
Journal of Physics B
影响因子：
--
作者：
J. Rao;K. Taylor
通讯作者：
J. Rao;K. Taylor
影响因子：
8.6
作者：
M. L. Zimmerman;M. Kash;D. Kleppner
通讯作者：
M. L. Zimmerman;M. Kash;D. Kleppner