电子束离子阱光谱标定和Ar^(13+)离子M1跃迁波长精密测量  

Spectral calibration for electron beam ion trap and precision measurement of M1 transition wavelength in Ar^(13+)

作　　者：刘鑫 周晓鹏 汶伟强[2] 陆祺峰 严成龙 许帼芹 肖君 黄忠魁 汪寒冰 陈冬阳 邵林 袁洋 汪书兴 马万路 马新文[2] Liu Xin;Zhou Xiao-Peng;Wen Wei-Qiang;Lu Qi-Feng;Yan Cheng-Long;Xu Guo-Qin;Xiao Jun;Huang Zhong-Kui;Wang Han-Bing;Chen Dong-Yang;Shao Lin;Yuan Yang;Wang Shu-Xing;Ma Wan-Lu;Ma Xin-Wen(Guangdong Provincial Key Laboratory of Nuclear Science,Institute of Quantum Matter,South China Normal University,Guangzhou 510006,China;Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China;Key Laboratory of Nuclear Physics and Ion-Beam Application(MOE),Institute of Modern Physics,Fudan University,Shanghai 200433,China;Department of Modern Physics,University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]华南师范大学量子物质研究院,广东核科学重点实验室,广州510006 [2]中国科学院近代物理研究所,兰州730000 [3]复旦大学现代物理研究所,核物理与离子束应用教育部重点实验室,上海200433 [4]中国科学技术大学近代物理系,合肥230026

出　　处：《物理学报》2022年第3期92-100,共9页Acta Physica Sinica

基　　金：国家重点研发计划(批准号:2017YFA0402300);国家自然科学基金(批准号:11904371,11974080);中国科学院战略先导科技专项(批准号:XDB34020000)和中国科学院青年创新促进会资助的课题。

摘　　要：高电荷态离子精细结构跃迁波长的精密测量不仅可以检验量子电动力学(quantum electrodynamics,QED)效应、电子关联效应等基本物理模型,还能够为天体物理、聚变等离子体物理甚至高电荷态离子光钟等研究提供关键原子物理数据.本工作基于复旦大学现代物理研究所的高温超导电子束离子阱(SH-HtscEBIT)装置,搭建了一套新的光谱校刻系统,并结合内校刻与外校刻的方法对其光谱波长测量的不确定度进行了评估,新的光谱校刻系统在可见光波段引起的波长不确定度最低达到0.002 nm.在此基础上,使用SH-HtscEBIT装置结合新的校刻系统开展了Ar^(13+)离子1s^(2)2s^(2)2p^(2)P_(1/2)-^(2)P_(3/2)磁偶极跃迁(M1)波长的精密测量,实验测得该跃迁波长为(441.2567±0.0026)nm,是目前SH-HtscEBIT上测量精度最高的实验结果,为下一步开展高电荷态离子超精细分裂和同位素位移等精密测量实验奠定了基础.The precise measurement of the transition wavelength of the fine structure of highly charged ions can not only test basic physical theories including the quantum electrodynamics effect and the electronic correlation effect but also provide key atomic data for astrophysics and fusion plasma physics.Furthermore,highly charged ions are considered as a potential candidate for optical clocks with extremely ultra-high precision.In this work,a new spectral calibration system is built in a high-temperature superconducting electron beam ion trap(SH-HtscEBIT)in the Institute of Modern Physics,Fudan University,and the uncertainty of its spectrum wavelength measurement is evaluated by combining internal and external calibrations.The minimum wavelength uncertainty caused by the new spectral calibration system in the visible light band reaches 0.002 nm.On this basis,the precise measurement of 2s^(2)2p^(2)P_(1/2)-^(2)P_(3/2) M1 transition wavelength for boron-like Ar^(13+) is performed at the SH-HtscEBIT by utilizing the new calibration system.The experimentally measured transition wavelength is(441.2567±0.0026)nm.It is currently the experimental result with the highest measurement accuracy of spectroscopy of highly charged ions at the SH-HtscEBIT,which lays the foundation for the precise measurement of the hyperfine splitting and isotope shift of highly charged ions in the future experiments.

关 键 词：电子束离子阱 禁戒跃迁 精密测量 高电荷态离子 

分 类 号：O57[理学—粒子物理与原子核物理]