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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Fine-structure energy levels, radiative rates and lifetimes in Si-like nickel
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Fine-structure energy levels, radiative rates and lifetimes in Si-like nickel

机译：硅状镍的精细结构能级，辐射速率和寿命

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摘要

Large scale CIV3 calculations of excitation energies from ground state as well as of oscillator strengths and radiative decay rates for all electric-dipole-allowed and intercombination transitions among the fine-structure levels of the terms belonging to the (1s ~22s ~22p ~6)3s ~23p ~2, 3s3p ~3, 3p ~4, 3s ~23p3d, 3s ~23p4s, 3s ~23p4p, 3s ~23p4d and 3s ~23p4f configurations of Ni XV, are performed using very extensive configuration-interaction wave functions. The relativistic effects in intermediate coupling are incorporated by means of the Breit-Pauli Hamiltonian. In order to keep our calculated energy splittings as close as possible to the National Institute of Standard and Technology (NIST) values, we have made small adjustments to the diagonal elements of the Hamiltonian matrices. Our calculated excitation energies, including their ordering, are in excellent agreement with the available NIST results. From our radiative decay rates we have also calculated radiative lifetimes of the fine-structure levels. It is noted that our calculated radiative rates show significant disagreement (23-30%) with those calculated by Ishikawa and Vilkas (2002 Phys. Scr. 65 219) for the transitions involving the 3s3p ~3(~5S _2) level. For this high spin level 3s3p ~3(~5S _2) our calculated lifetime is found to be in excellent agreement with the experimental value of Tr?bert et al (1989 Z. Phys. D 11 207). In this calculation, we also predict many additional new and accurate data for various optically allowed and intercombination transitions to complete the void in the existing data.
机译：对于（1s〜22s〜22p〜6）项的精细结构级之间的所有电偶极子允许的和组合的跃迁，从基态进行大能量的CIV3计算，以及从振荡器的强度和辐射衰减率的基态Ni XV的3s〜23p〜2、3s3p〜3、3p〜4、3s〜23p3d，3s〜23p4s，3s〜23p4p，3s〜23p4d和3s〜23p4f的配置是使用非常广泛的配置-交互波功能执行的。中间耦合中的相对论效应是通过Breit-Pauli Hamiltonian合并的。为了使我们计算出的能量分裂尽可能接近美国国家标准技术研究院（NIST）的值，我们对汉密尔顿矩阵的对角元素进行了细微调整。我们计算出的激发能，包括其排序，与可用的NIST结果非常吻合。根据我们的辐射衰减率，我们还计算出了精细结构能级的辐射寿命。值得注意的是，对于涉及3s3p〜3（〜5S _2）的跃迁，我们的计算辐射率与Ishikawa和Vilkas（2002 Phys。Scr。65 219）计算出的辐射率存在显着差异（23-30％）。对于这种高自旋能级3s3p〜3（〜5S _2），我们计算出的寿命与Tr？bert等人的实验值（1989 Z. Phys。D 11 207）非常一致。在此计算中，我们还预测了各种光学允许和相互结合跃迁的许多其他新的准确数据，以完善现有数据中的空隙。

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