Absorption spectroscopy of Ar2(5p) in the3Σ g and3Π g states

Conrad, Neal D.; Giessl, W; Leisner, C.; Tietz, R.; Langhoff, H.

doi:10.1007/bf01831567

Cited by 11 publications

(9 citation statements)

References 9 publications

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“…3. Similar structures have been reported in earlier investigations [6,7,8] measured at different buffer gas pressures. Within the experimental uncertainties differences in the spectra may be ascribed to the different pressure broadening.…”

Section: B) Saturation Spectrometrysupporting

confidence: 80%

“…Assuming Morse potentials for the excited and ground states the observed wave numbers are reproduced by the parameters [9] listed in Table 2. Their deviations from the former results [7,9] are small.…”

Section: A) Absorption Spectrometrymentioning

confidence: 58%

“…A continous background due to the absorption by Ar + 3 has already been subtracted. The spectrum consists of the wellknown [7,9] levels ascribed to the Ar * 2 (5p 3 Σ g , v ) ← Ar * 2 (4s 3 Σ u , v ) transitions. Additional band heads are identified at 537.7 nm (v = 2 ← v = 5) and at 535.95 nm (v = 1 ← v = 4).…”

Section: A) Absorption Spectrometrymentioning

confidence: 99%

“…This is the reason, why fluorescence from these states has never been reported except for the observation of a faint emission on the Ar * 2 (5p 3 Σ g ) → Ar * 2 (4s 3 Σ u ) 1 transition [11]. On the other hand, complete Rydberg series of Ar * 2 (np 3 Σ g ) and Ar * 2 (np 3 Π g ) triplet states have been found [3][4][5][6][7][8][9] by absorption spectrometry. Of the corresponding singlet states only the Ar * 2 (4s 1 Σ u ) is known due to its decay into the repulsive ground state.…”

Section: Introductionmentioning

confidence: 95%

“…The excited states of Ar 2 have been studied by absorption spectroscopy starting from the van der Waals ground state [1,2] Ar 2 (3p 6 1 Σ g ) or the excimer state [3][4][5][6][7][8][9] Ar * 2 (4s 3 Σ u ). Bound states result by adding an electron in a nλ configuration to the ionic dimer state Ar + 2 ( 2 Σ u ).…”

Section: Introductionmentioning

confidence: 99%

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Spectroscopic properties of the Ar*2(5p) excimer states

Kunz

Neeser

Langhoff

1997

Z Phys D - Atoms, Molecules and Clusters

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The transitions between Ar * 2 (5p) and Ar * 2 (4sΣ u ) have been investigated by absorption spectrometry. The fine structure of the Ar * 2 (5p 3 Π g ) was attributed to a predominantly Hund's case a coupling. A spin orbit coupling constant of A = (9.8±0.3) cm −1 results. Absorption by the singlet system allows one to determine the triplet/singlet splitting between the Ar * 2 (4sΣ u ) states to be (540 ± 100) cm −1 . The transition probabilities of the Ar * 2 (5p) and Ar * 2 (6p) levels were determined by saturation spectrometry yielding values between (0.2 − 2.5) · 10 6 s −1 .

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Section: B) Saturation Spectrometrysupporting

confidence: 80%

Section: A) Absorption Spectrometrymentioning

confidence: 58%

Section: A) Absorption Spectrometrymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Spectroscopic properties of the Ar*2(5p) excimer states

Kunz

Neeser

Langhoff

1997

Z Phys D - Atoms, Molecules and Clusters

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Electronic structure of Ne2 below the first ionization limit

Kim

Herring

Eden

et al. 1992

The Journal of Chemical Physics

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Results from new laser excitation spectra of 20Ne2 have been combined with previously published experimental and theoretical data to provide a consistent picture describing many of the Rydberg states observed below the first ionization limit. These states are found to fall mainly into Rydberg series converging on the ...3σu X 2Σ+u ground core of Ne+2. Spectral data for the npσ 3Σ+g←a 3Σ+u and npπ 3Πg←a 3Σ+u series support the current assignments of the upper states. Although (0–0) bands dominate these series, other vibronic transitions are observed. The 6–23pσ 3Σ+g–a(0–0) bands are more perturbed than the npπ 3Πg–a(0–0) series; hence, data for 4–17pπ 3Π+g–a(0–0) and 4–6fλ(3Σ+g,3Π+g)–a(0–0) were used to determine a value of 34 409±2 cm−1 for the lowest ionization limit of 20Ne2. Rotational constants for the v=0 levels of 4–17pπ 3Πg and 10–23pσ 3Σ+g also are presented.

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Rydberg states of the Ar2 molecule

Kane

Kim

Shannon

et al. 1992

The Journal of Chemical Physics

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Extensive spectra attributable to transitions from the 4sO" a 3~ + metastable state of Ar 2 to excited Rydberg states have been observed by intracavity absorption spectroscopy and by laser excitation spectroscopy in the afterglow of a pulsed corona discharge. Of these the most extensive and best resolved were the laser induced fluorescence spectra. Most of the spectra can be assigned to vibronic transitions in the nf:i eITg,3~t) and np:i eITg/~g+).-a 3~u+ series. The 5P1T 3IT g .-a 3~u+ and 7pO" 3~g+ .-a 3~: transitions observed near 19 823 and 19 529 cm -I, respectively, exhibit many bands with v' =f 0 in their (v' -v") vibrational band system developments. The higher n value members of these and other observed series are dominated by (0--0) transitions. Rotational structure is partially resolved in a few bands of the 7pO" 3~g+ -a system, but most of the spectra observed appear to be either rotationally unresolved or made up of blended collections of rotational lines. Above the 7pO", 5P1T pair, the (n + 2)pO" 3~g+ and np1T 3ITg members of the np:i series rapidly c9,alesce, indicating a rapid onset of decoupling of the electronic orbital angular momentum, L, from the internuclear axis. Such decoupling leads to np-complex formation at n values much lower than observed in the np:i series of the lighter dimers: He 2 and Ne2' From the data for the observed series, the lowest ionization limit of Ar2 (relative to a 3~u+ ,v = 0) was determined to be 29 373 ± 3 cm -I.Vibrational intervals 6.G(v + 112) for a 3~u+ (v<4) and 7pO" 3~g+ (v<2) yield the vibrational constants {J)e = 296 and 282 cm -I and x{J)e = 2.5 and 17 cm -I, respectively.

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Absorption spectroscopy of Ar2(5p) in the3Σ g and3Π g states

Cited by 11 publications

References 9 publications

Spectroscopic properties of the Ar*2(5p) excimer states

Spectroscopic properties of the Ar*2(5p) excimer states

Electronic structure of Ne2 below the first ionization limit

Rydberg states of the Ar2 molecule

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