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Chinese Optics Letters

Chinese Optics Letters

| PUBLISHED MONTHLY BY CHINESE LASER PRESS AND DISTRIBUTED BY OSA

  • Vol. 9, Iss. 5 — May. 10, 2011
  • pp: 050201–

Application of electric field ionization method to detect the high-lying Rydberg states of Eu I

Jun Xie, Changjian Dai, and Ming Li  »View Author Affiliations


Chinese Optics Letters, Vol. 9, Issue 5, pp. 050201- (2011)


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Abstract

The 4f7 6s(9S)np 8PJ (J=5/2, 7/2, 9/2) Rydberg series converging to the first ionization limit 4f7 6s 9S4 of the Eu atom using the three-step laser excitation and electric-field-ionization (EFI) method are studied. First, the Eu atom is excited from the 4f7 6s2 8So7/2 ground state to the 4f76s7s 8So7/2 state through the 4f7 6s6p 10P9/2 state by the first two dye lasers. Next, it is populated to many higher-n members of the 4f7 6s(9S)np 8PJ Rydberg series by the third dye laser whose wavelength is scanned within a certain range. Finally, the atom in these higher-n states is ionized by the external pulsed electric field. With the field strength up to 2 kV/cm, we can detect the atom in 4f76s(9S)np 8PJ states with n>40. With the given laser line width, the level energies of Rydberg states with n as high as 72 can be determined. We not only confirm the previous data on the 4f76s(9S) np 8PJ Rydberg series, but also extend the n-value assignment significantly by detecting more states.

© 2011 Chinese Optics Letters

OCIS Codes
(020.0020) Atomic and molecular physics : Atomic and molecular physics
(020.5780) Atomic and molecular physics : Rydberg states
(300.0300) Spectroscopy : Spectroscopy
(300.6210) Spectroscopy : Spectroscopy, atomic

Citation
Jun Xie, Changjian Dai, and Ming Li, "Application of electric field ionization method to detect the high-lying Rydberg states of Eu I," Chin. Opt. Lett. 9, 050201- (2011)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-9-5-050201


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