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Updated: Jan 18, 2026

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超稳定的寿命 6d ^{2}D_{5/2} 和 6d ^{2}D_{3/2} 状态 Ra^{+}
Haoran Li1, Huaxu Dan1, Mingyu Fan1
1University of California, Santa Barbara, Department of Physics, California 93106, USA.
Physical review letters
|September 10, 2025
概括
我们测量了Ra+元稳定D状态的寿命,这对于光学钟和原子理论至关重要. 使用新的合集群方法进行的计算准确地预测了这些寿命,验证了它对重元素的使用.
科学领域:
- 原子物理 原子物理
- 量子化学 是一个量子化学.
- 频谱学是一种光谱学.
背景情况:
- 像Ra+这样的重离子中的元稳定状态对于先进的应用至关重要.
- 精确的寿命测量对于光学频率标准和理论基准测试至关重要.
- 由于相对论和相关性效应,预测重元素的原子性质具有挑战性.
研究的目的:
- 测量Ra+的6d 2D5/2和6d 2D3/2元稳定状态的寿命.
- 验证一种新的合集群单双三重 (CCSDT) 方法,用于预测重元素的原子性质.
- 评估这些生命周期对光学频率标准和原子理论的潜力.
主要方法:
- 使用光谱学的实验性生命周期测量.
- 理论计算采用合集群单双三倍 (CCSDT) 方法,包括代核心和价值三倍激发.
- 与实验结果对比理论预测.
主要成果:
- 测量寿命: 6d 2D5/2 的 τ5 = 303.8(1.5) ms 和 6d 2D3/2.9 的 τ3 = 642(9) ms.
- CCSDT方法准确地预测了这些寿命,在实验不确定性范围内显示了一致性.
- 这标志着CCSDT方法首次用于重元素中过渡性质的应用.
结论:
- 测量的寿命为开发精确的光学频率标准提供了关键数据.
- 经过验证的CCSDT方法在预测重元素的原子性质方面表现出很高的准确性.
- 准确的原子性质预测对于基本对称性测试和光学时钟开发至关重要.
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