Isotope shifts in cadmium as a sensitive probe for physics beyond the standard model
Isotope shifts in cadmium as a sensitive probe for physics beyond the standard model
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DOI：
10.1088/1367-2630/acacbb
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发表时间：
2022-08
影响因子：
3.3
通讯作者：
B. Ohayon;S. Hofsass;J. E. Padilla-Castillo;S. Wright;G. Meijer;S. Truppe;K. Gibble;B. Sahoo
中科院分区：
文献类型：
--
作者：
B. Ohayon;S. Hofsass;J. E. Padilla-Castillo;S. Wright;G. Meijer;S. Truppe;K. Gibble;B. Sahoo
原子能级的同位素位移是研究原子核结构和标准模型之外的新物理的灵敏探针。我们提出了一个分析的IS的镉原子（镉I）和单电荷镉离子（镉II）。IS的229 nm，326 nm，361 nm和480 nm线的镉I测量与各种技术;缓冲气体冷却束光谱，捕获原子的磁光阱，和光泵。本文采用解析响应相对论耦合团簇理论，在单重、双重和三重近似下，高精度地计算了Cd Ⅱ D_1和D_2线的IS常数。结合对Cd Ⅱ的计算和实验，我们推断出Cd Ⅰ所有低能级跃迁的IS常数。我们基准现有的计算通过不同的多体方法对这些常数。我们的计算镉II使镉同位素的核电荷半径提取前所未有的准确性。我们的精确计算和测量的结合表明，国王情节镉我可以提高国家的最先进的灵敏度，一个新的重玻色子高达两个数量级。
Isotope shifts (ISs) of atomic energy levels are sensitive probes of nuclear structure and new physics beyond the standard model. We present an analysis of the ISs of the cadmium atom (Cd I) and singly charged cadmium ion (Cd II). ISs of the 229 nm, 326 nm, 361 nm and 480 nm lines of Cd I are measured with a variety of techniques; buffer–gas-cooled beam spectroscopy, capturing atoms in a magneto-optic-trap, and optical pumping. IS constants for the D1 and D2 lines of Cd II are calculated with high accuracy by employing analytical response relativistic coupled-cluster theory in the singles, doubles and triples approximations. Combining the calculations for Cd II with experiments, we infer IS constants for all low-lying transitions in Cd I. We benchmark existing calculations via different many-body methods against these constants. Our calculations for Cd II enable nuclear charge radii of Cd isotopes to be extracted with unprecedented accuracy. The combination of our precise calculations and measurements shows that King plots for Cd I can improve the state-of-the-art sensitivity to a new heavy boson by up to two orders of magnitude.