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Experimental Research of Spontaneous Evolution from Ultracold Rydberg Atoms to Plasma |
| ZHANG Lin-Jie;FENG Zhi-Gang;LI An-Ling;ZHAO Jian-Ming;LI Chang-Yong;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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| Cite this article: |
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ZHANG Lin-Jie, FENG Zhi-Gang, LI An-Ling et al 2008 Chin. Phys. Lett. 25 1362-1364 |
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Abstract The spontaneous evolution from ultracold Rydberg atoms to plasma is investigated in a caesium MOT by using the method of field ionization. The plasma transferred from atoms in different Rydberg states (n=22--32) are obtained experimentally. Dependence of the threshold time of evolving to
plasma and the threshold number of initial Rydberg atoms on the principal quantum number of initial Rydberg states is studied. The experimental results are in agreement with hot--cold Rydberg--Rydberg atom collision ionization theory.
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| Keywords:
52.27.Gr
32.80.Zb
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Received: 23 November 2007
Published: 31 March 2008
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