Experimental study of bound and autoionizing Rydberg states of the europium atom

doi:10.1088/1674-1056/19/6/063202

中国物理B ›› 2010, Vol. 19 ›› Issue (6): 63202-063202.doi: 10.1088/1674-1056/19/6/063202

Experimental study of bound and autoionizing Rydberg states of the europium atom

肖颖, 戴长建, 秦文杰

School of Science, Tianjin University of Technology, Tianjin 300384, China

收稿日期:2009-06-19 出版日期:2010-06-15 发布日期:2010-06-15
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).

Experimental study of bound and autoionizing Rydberg states of the europium atom

Xiao Ying(肖颖), Dai Chang-Jian(戴长建)^†, and Qin Wen-Jie(秦文杰)

School of Science, Tianjin University of Technology, Tianjin 300384, China

Received:2009-06-19 Online:2010-06-15 Published:2010-06-15
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： An isolated-core-excitation (ICE) scheme and stepwise excitation are employed to study the highly excited states of the europium atom. The bound europium spectrum with odd parity in a region of 42400--43500~cm^{ - 1} is measured, from which spectral information on 38 transitions, such as level position and relative intensity, can be deduced. Combined with information about excitation calibration and the error estimation process, the selection rules enable us to determine the possible values of total angular momentum J for the observed states. The autoionization spectra of atomic europium, belonging to the 4f^{7}6p{nl} (l=0, 2) configurations, are systematically investigated by using the three-step laser resonance ionization spectroscopy (RIS) approach. With the ICE scheme, all the experimental spectra of the autoionizing states have nearly symmetric profiles whose peak positions and widths can be easily obtained. A comparison between our results and those from the relevant literature shows that our work not only confirms many reported states, but also discovers 14 bound states and 16 autoionizing states.

Abstract: An isolated-core-excitation (ICE) scheme and stepwise excitation are employed to study the highly excited states of the europium atom. The bound europium spectrum with odd parity in a region of 42400--43500~cm^{ - 1} is measured, from which spectral information on 38 transitions, such as level position and relative intensity, can be deduced. Combined with information about excitation calibration and the error estimation process, the selection rules enable us to determine the possible values of total angular momentum J for the observed states. The autoionization spectra of atomic europium, belonging to the 4f$^{7}$6p$nl$ ($l$ = 0, 2) configurations, are systematically investigated by using the three-step laser resonance ionization spectroscopy (RIS) approach. With the ICE scheme, all the experimental spectra of the autoionizing states have nearly symmetric profiles whose peak positions and widths can be easily obtained. A comparison between our results and those from the relevant literature shows that our work not only confirms many reported states, but also discovers 14 bound states and 16 autoionizing states.

Key words: europium atom, isolated-core-excitation, highly excited states, autoionizing Rydberg states

中图分类号: (Autoionization)

32.80.Zb

32.70.Fw (Absolute and relative intensities)

肖颖, 戴长建, 秦文杰. Experimental study of bound and autoionizing Rydberg states of the europium atom[J]. 中国物理B, 2010, 19(6): 63202-063202.

Xiao Ying(肖颖), Dai Chang-Jian(戴长建), and Qin Wen-Jie(秦文杰). Experimental study of bound and autoionizing Rydberg states of the europium atom[J]. Chin. Phys. B, 2010, 19(6): 63202-063202.

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Experimental study of bound and autoionizing Rydberg states of the europium atom

Experimental study of bound and autoionizing Rydberg states of the europium atom

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