Bulletin of the American Physical Society
55th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Monday–Friday, June 3–7, 2024; Fort Worth, Texas
Session C03: Precision Measurements and Precision Spectroscopy
2:00 PM–4:00 PM,
Tuesday, June 4, 2024
Room: 201A
Chair: Michael Bishof, Argonne National Laboratory
Abstract: C03.00005 : Precision Spectroscopy and Nuclear Structure Parameters in 6,7Li+ ions*
2:48 PM–3:00 PM
Presenter:
Zong-Chao Yan
(University of New Brunswick)
Authors:
Zong-Chao Yan
(University of New Brunswick)
Hua Guan
(Wuhan Institute of Physics and Mathematics)
Xiao-Qiu Qi
(Zhejiang Sci-Tech University)
Peng-Peng Zhou
(Wuhan Institute of Physics and Mathematics)
Wei Sun
(Wuhan Institute of Physics and Mathematics)
Shao-Long Chen
(Wuhan Institute of Physics and Mathematics)
Xu-Rui Chang
(Wuhan Institute of Physics and Mathematics)
Zhi-Qiang Zhou
(Wuhan Institute of Physics and Mathematics)
Yao Huang
(Wuhan Institute of Physics and Mathematics)
Pei-Pei Zhang
(Wuhan Institute of Physics and Mathematics)
G. W. F. Drake
(University of Windsor)
Ai-Xi Chen
(Zhejiang Sci-Tech University)
Zhen-Xiang Zhong
(Hainan University)
Ting-Yun Shi
(Wuhan Institute of Physics and Mathematics)
Ke-Lin Gao
(Wuhan Institute of Physics and Mathematics)
in the most precise measurements of the hyperfine splittings for the 2 3S1 and 2 3PJ states,
with uncertainties as small as 10 kHz [1]. These results markedly reduce the uncertainties of previous
experiments by a factor of 4-5 for the 2 3S1 states and a factor of 5 to 50 for the 2 3PJ states, while
also demonstrating improved agreement with theoretical values. Combining the measured hyperfine
intervals of the 2 3S1 states with the latest quantum electrodynamic calculations, we determined, respectively, the
improved Zemach radii of the 6,7Li nuclei to be 2.44(2) fm and 3.35(1) fm. Utilizing the determined Zemach radii and the hyperfine structure measurements
of the 2 3PJ states, we derived the nuclear electric quadrupole moments Qd of 6,7Li as −0.39(5) fm2 and −3.86(5) fm2,
deviating from the current recommended values by 6.2σ and 1.8σ [2], respectively. Furthermore, the ratio Qd(6Li)/Qd(7Li) = 0.101(13), exhibiting a
significant deviation from the measured value of 0.020161(13) by LiF molecular spectroscopy [3]. These discrepancies are perplexing, and we call for additional
experimental measurements in atomic and molecular spectroscopy, electron scattering, and related theoretical calculations pertaining to lithium.
*Key funding supports: NNSF of China, NSERC of Canada
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700