Even-parity states of the Sm atom with stepwise excitation

doi:10.1088/1674-1056/20/6/063204

中国物理B ›› 2011, Vol. 20 ›› Issue (6): 63204-063204.doi: 10.1088/1674-1056/20/6/063204

Even-parity states of the Sm atom with stepwise excitation

李鸣, 戴长建, 谢军

Key Laboratory of Display Materials and Photoelectric Devices of Ministry of Education, Tianjin 300384, China;School of Science, Tianjin University of Technology, Tianjin 300384, China

收稿日期:2010-02-25 修回日期:2011-01-20 出版日期:2011-06-15 发布日期:2011-06-15
基金资助:
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).

Even-parity states of the Sm atom with stepwise excitation

Li Ming(李鸣)^a)b), Dai Chang-Jian(戴长建)^a)b)†, and Xie Jun(谢军)^a)b)

^aKey Laboratory of Display Materials and Photoelectric Devices of Ministry of Education, Tianjin 300384, China; ^bSchool of Science, Tianjin University of Technology, Tianjin 300384, China

Received:2010-02-25 Revised:2011-01-20 Online:2011-06-15 Published:2011-06-15
Supported by:
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).

摘要/Abstract

摘要： Two-colour stepwise excitation and photoionization schemes are adopted to study the spectra of high-lying states of the Sm atom. These bound even-parity states are excited with three different excitation paths from the 4f⁶6s6p⁷D_J (J=1, 2, 3) intermediate states, respectively. They are probed by photoionization process with an extra photon driving them to the continuum states. In this experiment, 270 states are detected in an energy range from 36160 cm^-1 to 42250 cm^-1, 109 of which are newly discovered, while the rest of them are confirmed to be the energy levels reported previously. Furthermore, based on the J-momentum selection rules of three excitation paths, a unique assignment of J-momentum for all observed states is determined, eliminating all remaining ambiguities in the literature. Finally, 53 single-colour transitions originating from the scanning laser are also identified. For all the relevant transitions, the information about their relative intensities is also given in the paper.

关键词: stepwise excitation, Sm atom, even-parity, high-lying states

Abstract: Two-colour stepwise excitation and photoionization schemes are adopted to study the spectra of high-lying states of the Sm atom. These bound even-parity states are excited with three different excitation paths from the 4f⁶6s6p⁷D_J (J=1, 2, 3) intermediate states, respectively. They are probed by photoionization process with an extra photon driving them to the continuum states. In this experiment, 270 states are detected in an energy range from 36160 cm^-1 to 42250 cm^-1, 109 of which are newly discovered, while the rest of them are confirmed to be the energy levels reported previously. Furthermore, based on the J-momentum selection rules of three excitation paths, a unique assignment of J-momentum for all observed states is determined, eliminating all remaining ambiguities in the literature. Finally, 53 single-colour transitions originating from the scanning laser are also identified. For all the relevant transitions, the information about their relative intensities is also given in the paper.

Key words: stepwise excitation, Sm atom, even-parity, high-lying states

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

32.80.Fb

32.30.Jc (Visible and ultraviolet spectra) 32.70.Fw (Absolute and relative intensities)

李鸣, 戴长建, 谢军. Even-parity states of the Sm atom with stepwise excitation[J]. 中国物理B, 2011, 20(6): 63204-063204.

Li Ming(李鸣), Dai Chang-Jian(戴长建), and Xie Jun(谢军). Even-parity states of the Sm atom with stepwise excitation[J]. Chin. Phys. B, 2011, 20(6): 63204-063204.

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Even-parity states of the Sm atom with stepwise excitation

Even-parity states of the Sm atom with stepwise excitation

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