Absorption oscillator strengths for some low-lying transitions of Ga^{2 +}

<b>Table 2.</b> Absorption oscillator strengths for some low-lying transitions of Ga^{2 +}. The acronyms MP and RCC are defined in the text while RMBPT refers to relativistic many body perturbation theory and MCHF refers to (non-relativistic) multi-configuration Hartree–Fock. <strong>Abstract</strong> The blackbody radiation shift of the Ga⁺4{\rm s}^2 \ ^1{\rm S}^{\rm e}_0 \rightarrow 4{\rm s}4{\rm p} \ ^3{\rm P}^{\rm o}_0 clock transition is computed to be −0.0140 ± 0.0062 Hz at 300 K. The small shift is consistent with the blackbody radiation shifts of the clock transitions of other group III ions which are of a similar size. The polarizabilities of the Ga⁺4{\rm s}^2 \ ^1{\rm S}^{\rm e}_0, 4{\rm s}4{\rm p} \ ^3{\rm P}^{\rm o}_0, and 4{\rm s}4{\rm p} \ ^1{\rm P}^{\rm o}_1 states were computed using the configuration interaction method with an underlying semi-empirical core potential. Quadrupole and non-adiabatic dipole polarizabilities were also computed. A byproduct of the analysis involved calculations of the low-lying spectrum and oscillator strengths, including polarizabilities, of the Ga^{2 +} ion.**表 2.** Ga²+若干低能跃迁的吸收振子强度。缩写MP与RCC的定义见正文，其中RMBPT指代相对论多体微扰理论（relativistic many body perturbation theory），MCHF指代（非相对论）多组态哈特里-福克（multi-configuration Hartree–Fock）。 **摘要** 本研究计算了Ga+的4s² ¹S₀^e → 4s4p ³P₀^o钟跃迁在300 K下的黑体辐射漂移，结果为−0.0140 ± 0.0062 Hz。该漂移量较小，与其他第Ⅲ族离子钟跃迁的黑体辐射漂移量级相近，二者具有良好的一致性。采用基于半经验核势的组态相互作用方法，计算了Ga+的4s² ¹S₀^e、4s4p ³P₀^o以及4s4p ¹P₁^o态的极化率，同时还计算了四极极化率与非绝热偶极极化率。本分析的一项附带成果为：对Ga²+离子的低能能谱、振子强度（含极化率）进行了计算。

搜集汇总

背景与挑战

背景概述

该数据集提供了Ga2+离子低能跃迁的吸收振子强度及相关理论计算结果，数据来源于计算Ga+时钟跃迁黑体辐射位移的副产品分析，包含基于RMBPT、MCHF等多种理论方法计算的谱线、极化率等参数。数据集属于原子与分子物理领域，发布于2013年，采用开放许可。