# Precision calculation of hyperfine structure of $^{7,9}$Be$^{2+}$ ions

@inproceedings{Qi2022PrecisionCO, title={Precision calculation of hyperfine structure of \$^\{7,9\}\$Be\$^\{2+\}\$ ions}, author={Xiao-Qiu Qi and Pei-pei Zhang and Zong-Chao Yan and Ting-yun Shi and G. W. F. Drake and Ai-xi Chen and Zhen-Xiang Zhong}, year={2022} }

Xiao-Qiu Qi, Pei-Pei Zhang, Zong-Chao Yan, Ting-Yun Shi, G. W. F. Drake, Ai-Xi Chen, and Zhen-Xiang Zhong 1 Key Laboratory of Optical Field Manipulation of Zhejiang Province and Physics Department of Zhejiang Sci-Tech University, Hangzhou 310018, China 2 State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China 3…

## References

SHOWING 1-10 OF 35 REFERENCES

### Precision Calculation of Hyperfine Structure and the Zemach Radii of ^{6,7}Li^{+} Ions.

- Physics, Materials SciencePhysical review letters
- 2020

The conclusion that the Zemach radius of ^{7}Li is about 40% larger than that of ^(6)Li is confirmed, and the hyperfine splittings of the 2^{3}P_{J} states of ^{6,7} Li^{+}, where an order of magnitude improvement over the previous theory has been achieved for ^{6}Li^{+}.

### Fine and hyperfine splitting of the 2P state in Li and Be

- Physics
- 2009

Accurate calculations of the fine and hyperfine splitting of the $2P$ state in Li and ${\text{Be}}^{+}$ isotopes using the explicitly correlated Hylleraas basis set are presented. Theoretical…

### Precision calculation of fine structure in helium and Li

- Physics
- 2015

The fine structure constant α can be extracted from high-precision spectroscopy of the 23 P J fine structure splittings in helium and light helium-like ions. In this work, the 23 P J fine structure…

### Ionization Energy of the Metastable 2 ^{1}S_{0} State of ^{4}He from Rydberg-Series Extrapolation.

- PhysicsPhysical review letters
- 2021

A new measurement of the ionization energy of the 2 ^{1}S_{0} state of He is presented, which reveals disagreements with the α^{7}m Lamb shift prediction by 6.5σ and 10σ, which hinders the determination of the He^{2+} charge radius from atomic spectroscopy.

### Hyperfine structure of the $2\,^3\!P$ state in $^9$Be and the nuclear quadrupole moment

- Physics
- 2021

We have performed accurate calculations of the hyperfine structure of the 2 P state in the Be atom with the help of highly optimized, explicitly correlated functions, accounting for the leading…

### Precision Test of Many-Body QED in the Be+ 2p Fine Structure Doublet Using Short-Lived Isotopes.

- PhysicsPhysical review letters
- 2015

This represents one of the most accurate tests of quantum electrodynamics for many-electron systems, being insensitive to nuclear uncertainties, and good agreement is observed.

### Hyperfine structure of Li and Be

- Physics
- 2008

A large-scale relativistic configuration-interaction (CI) calculation is performed for the magnetic-dipole and the electric-quadrupole hyperfine structure splitting in $^{7,6}\mathrm{Li}$ and…

### Progress in helium fine-structure calculations and the fine-structure constant

- Physics
- 2002

The long-term goal of this work is to determine the fine-structure constant α from a comparison between theory and experiment for the fine-structure splittings of the helium 1s2p 3PJ states. All…

### Testing fundamental interactions on the helium atom

- Physics
- 2017

We critically examine the current status of theoretical calculations of the energies, the fine structure, and the isotope shift of the lowest-lying states of helium, searching for unresolved…

### High precision calculation of fine structure splittings in helium and He-like ions.

- PhysicsPhysical review letters
- 1995

Fine structure splittings for the 1{ital s}2{ital p} {sup 3}{ital P} state of helium are calculated to a computational accuracy of 3 parts in 10{sup 9}, including all terms up to {ital O}({alpha}{sup…