The experimental study of Ba 6pjnk |M|=0, 1 autoionizing series

Liu, Yongping; Dai, Chao; Li, Shiben

doi:10.1016/j.elspec.2004.06.015

Cited by 4 publications

(3 citation statements)

References 29 publications

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“…Electric field ionization (EFI) processes in simpler atoms have been investigated extensively for the last two decades either experimentally [1][2][3] or theoretically. [1,4] The full-scale investigations of the EFI of Rydberg states for both alkali-metal atoms, [4][5][6] such as Li and Na, and alkaline-earth atoms, [7,8] e.g., Ba and Sr, have been carried out.…”

Section: Introductionmentioning

confidence: 99%

Field ionization process of Eu 4f⁷6snp Rydberg states

Zhang

Dai

2015

Chinese Phys. B

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The field ionization process of the Eu 4f76snp Rydberg states, converging to the first ionization limit, 4f76s 9S4, is systematically investigated. The spectra of the Eu 4f76snp Rydberg states are populated with three-step laser excitation, and detected by electric field ionization (EFI) method. Two different kinds of the EFI pulses are applied after laser excitation to observe the possible impacts on the EFI process. The exact EFI ionization thresholds for the 4f76snp Rydberg states can be determined by observing the corresponding EFI spectra. In particular, some structures above the EFI threshold are found in the EFI spectra, which may be interpreted as the effect from black body radiation (BBR). Finally, the scaling law of the EFI threshold for the Eu 4f76snp Rydberg states with the effective quantum number is built.

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Section: Introductionmentioning

confidence: 99%

Field ionization process of Eu 4f⁷6snp Rydberg states

Zhang

Dai

2015

Chinese Phys. B

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“…As the rare-earth atoms have many important applications in both science and technology, they attract a lot of attention from different fields. Because of the partially filled 4f shell, unlike the alkaline-earth atoms [5][6][7][8], their spectra provide not only information on the outermost electrons, but also on the 4f-shell electrons. This quantum property makes their spectra much more complex than those of the alkaline-earth atoms, thus it is a challenging task to study the atomic spectra of rare-earth atoms.…”

Section: Introductionmentioning

confidence: 99%

Photoionization spectra of an Sm atom with stepwise excitation

Hong-Ying

Dai

Feng

2009

J. Phys. B: At. Mol. Opt. Phys.

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Photoionization spectra of an Sm atom are carried out with a stepwise photoexcitation approach. The high-lying states with even parity have been populated with two different excitation paths via 4f 6 6s6p[ 7 D 2 ] and 4f 6 6s6p[ 5 G 3 ] intermediate states, respectively. The corresponding settings are as follows: (a) the wavelength of the first laser is fixed at 464.67 nm, while the wavelength of the second laser is scanned from 484 nm to 520 nm; (b) the wavelength of the first laser is fixed at 574.81 nm, while the wavelength of the second laser is scanned from 460 nm to 516 nm. Having been populated in the high-lying states, the Sm atoms are then probed by the photoionization process. In this experiment, 74 states in the energy region between 41 061 and 42 478 cm −1 , and 109 states in the energy region between 37 588 and 39 927 cm −1 have been detected, providing information about level energies and the relative line intensities of these transitions. Some of the observed transitions can be identified with the same states in the literature, while 34 states are not to be found in the literature. In addition, much effort has also been devoted to the designation of observed spectral lines.

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“…In recent years, studies on highly-excited alkalineearth atoms have gained dramatic progress in both experimental and theoretical aspects. The progress can be classified into electromagnetic effects on spectra, [1,2] autoionization spectra, [3,4] the dynamic characteristics of autoionization, [5] the autoionization detection, [6] and so on. However, studies on more complex atoms, such as the rare-earth atoms, are much less, especially those with complicated spectral structures.…”

Section: Introductionmentioning

confidence: 99%

Studies on odd-parity states of the Sm atom

2008

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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 4f66s2 7FJ (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 4f6 6s6p and 4f55d6s2 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 4f66s2 7FJ (J = 0–6) states to the atomic states with 4f6 6s6p and 4f55d6s2 electronic configurations. This work also reports many spectral data on the odd-parity states that cannot be found in the literature.

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The experimental study of Ba 6pjnk |M|=0, 1 autoionizing series

Cited by 4 publications

References 29 publications

Field ionization process of Eu 4f⁷6snp Rydberg states

Field ionization process of Eu 4f⁷6snp Rydberg states

Photoionization spectra of an Sm atom with stepwise excitation

Studies on odd-parity states of the Sm atom

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The experimental study of Ba 6pjnk |M|=0, 1 autoionizing series

Cited by 4 publications

References 29 publications

Field ionization process of Eu 4f76snp Rydberg states

Field ionization process of Eu 4f76snp Rydberg states

Photoionization spectra of an Sm atom with stepwise excitation

Studies on odd-parity states of the Sm atom

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Product

Resources

About

Field ionization process of Eu 4f⁷6snp Rydberg states

Field ionization process of Eu 4f⁷6snp Rydberg states