Chin. Phys. Lett.  2008, Vol. 25 Issue (7): 2661-2663    DOI:
Original Articles |
Measurement of Ionization Threshold of Ultracold Cesium Rydberg Atoms in Static Electric Field

FENG Zhi-Gang, ZHANG Lin-Jie, ZHAO Jian-Ming, LI Chang-Yong, LI An-Ling, JIA Suo-Tang

State Key Laboratory of Quantum Optics and Quantum Optics Devices, College of Physics and Electronics Engineering, Shanxi University, Taiyuan 030006
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FENG Zhi-Gang, ZHANG Lin-Jie, ZHAO Jian-Ming et al  2008 Chin. Phys. Lett. 25 2661-2663
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Abstract We investigate the field ionization spectra of ultracold cesium Rydberg atoms in dc electric field. The ionization thresholds of different electric fields are measured and shift of the ionization threshold relative to field-free ionization threshold is accurately described by (6.06±0.14)F1/2, which is in good agreement with the classical saddle-point model for field ionization. We obtain the field-free ionization threshold of cesium (6P3/2) as 19674.89±2.99cm-1 by fitting experimental data.
Keywords: 79.70.+q      32.10.Hq      32.80.Pj     
Received: 04 March 2008      Published: 26 June 2008
PACS:  79.70.+q (Field emission, ionization, evaporation, and desorption)  
  32.10.Hq (Ionization potentials, electron affinities)  
  32.80.Pj  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2008/V25/I7/02661
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FENG Zhi-Gang
ZHANG Lin-Jie
ZHAO Jian-Ming
LI Chang-Yong
LI An-Ling
JIA Suo-Tang
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