Guan Feng(关锋), Dai Chang-Jian(戴长建)† , and Zhao Hong-Ying(赵洪英)
Key Laboratory of Display Materials and Photoelectric Devices, Ministry of Education, Tianjin 300191, China School of Science, Tianjin University of Technology, Tianjin 300384, China
Abstract Two-step excitation and ionization processes are used to detect Sm atoms in many excited states populated with tunable lasers. The wavelength of the first laser is tuned to the resonances from the Sm 4f$^{6 }$6s$^{2}$ ${}^7F_{J}$ ($J$=0--6) states to many odd-parity states with different electronic configurations, where the atoms are detected by photoionization process using an ultraviolet laser with a wavelength of 355 nm. Precise measurements on the energy level and intensity for many Sm 4f$^{6}$ 6s6p and 4f$^{5}$5d6s$^{2}$ states have been carried out. In a theoretical analysis on the spectral data, such as peak position, relative intensity, many transitions can be identified as the resonances from the Sm 4f$^{6 }$6s$^2$ $^7F_{J }$ ($J$=0--6) states to the atomic states with 4f$^{6 }$6s6p and 4f$^{5}$5d6s$^{2}$ electronic configurations. This work also reports many spectral data on the odd-parity states that cannot be found in the literature.
Received: 01 January 2008
Revised: 25 April 2008
Accepted manuscript online:
PACS:
32.80.Fb
(Photoionization of atoms and ions)
Fund: Project supported by
the National Natural Science Foundation of China (Grant Nos 10574098
and 10674102), and the Natural Science Foundation of Tianjin,
China (Grant No 05YFJMJC05200).
Cite this article:
Guan Feng(关锋), Dai Chang-Jian(戴长建), and Zhao Hong-Ying(赵洪英) Studies on odd-parity states of the Sm atom 2008 Chin. Phys. B 17 3655
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