中国物理B ›› 2009, Vol. 18 ›› Issue (5): 1838-1842.doi: 10.1088/1674-1056/18/5/020

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Measurement of quantum defect of nS and nD states using field ionization spectroscopy in ultracold cesium atoms

张临杰1, 李安玲1, 冯志刚2, 赵建明2, 李昌勇2, 贾锁堂2   

  1. (1)State Key Laboratory of Quantum Optics and Quantum Optics Devices, College of Physics and Electronics Engineering, Shanxi University,Taiyuan 030006, China; (2)State Key Laboratory of Quantum Optics and Quantum Optics Devices, College of Physics and Electronics Engineering, Shanxi University, Taiyuan 030006, China
  • 收稿日期:2008-08-26 修回日期:2008-10-08 出版日期:2009-05-20 发布日期:2009-05-20
  • 基金资助:
    Project supported by the 973 Program of China (Grant No 2006CB921603), the National Natural Science Foundation of China (Grant Nos 10574084, 60678003 and 60778008), the Special Foundation for State Major Basic Research Program of China (Grant No 2005CCA06

Measurement of quantum defect of nS and nD states using field ionization spectroscopy in ultracold cesium atoms

Zhang Lin-Jie(张临杰), Feng Zhi-Gang(冯志刚), Li An-Ling(李安玲), Zhao Jian-Ming(赵建明)†, Li Chang-Yong(李昌勇), and Jia Suo-Tang(贾锁堂)   

  1. State Key Laboratory of Quantum Optics and Quantum Optics Devices, College of Physics and Electronics Engineering, Shanxi University,Taiyuan 030006, China
  • Received:2008-08-26 Revised:2008-10-08 Online:2009-05-20 Published:2009-05-20
  • Supported by:
    Project supported by the 973 Program of China (Grant No 2006CB921603), the National Natural Science Foundation of China (Grant Nos 10574084, 60678003 and 60778008), the Special Foundation for State Major Basic Research Program of China (Grant No 2005CCA06

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摘要： This paper reports that ultracold atoms are populated into different NS and ND Rydberg states (N=25～ 52) by two-photon excitation. The ionization spectrum of an ultracold Rydberg atom is acquired in a cesium magneto-optical trap by using the method of pulse field ionization. This denotes NS and ND states in the ionization spectrum and fits the data of energy levels of different Rydberg states to obtain quantum defects of NS and ND states.

关键词: ultracold Rydberg atoms, quantum defect, field ionization spectrum, two-photon excitation

Abstract:

This paper reports that ultracold atoms are populated into different nS and nD Rydberg states (n=25～52) by two-photon excitation. The ionization spectrum of an ultracold Rydberg atom is acquired in a cesium magneto-optical trap by using the method of pulse field ionization. This denotes nS and nD states in the ionization spectrum and fits the data of energy levels of different Rydberg states to obtain quantum defects of nS and nD states.

Key words: ultracold Rydberg atoms, quantum defect, field ionization spectrum, two-photon excitation

中图分类号:  (Photoionization of atoms and ions)

  • 32.80.Fb
37.10.De (Atom cooling methods) 32.80.Rm (Multiphoton ionization and excitation to highly excited states) 32.60.+i (Zeeman and Stark effects)