New interferometric observations of Ar i in the photographic region*

Li, Hui H.; Humphreys, Curtis J.

doi:10.1364/josa.64.001072

Cited by 18 publications

(15 citation statements)

References 13 publications

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“…Figure 1 . The second study was published by Li and Humphreys [3] in 1974. In this experiment 307 Ar I lines were excited in microwave-excited EDLs.…”

Section: Wave Numbersmentioning

confidence: 99%

“…van der Waals) line-shift for lines perturbed simultaneously by van der Waals and resonant interactions. He defines the parameter a = [2γ (3)/N]/[2γ (6)/N], measuring the relative strength of the resonance and van der Waals interactions. The terms 2γ (3)/N and 2γ (6)/N are the theoretical broadening coefficients for the resonance and van der Waals interactions, respectively.…”

Section: Interaction Potentialmentioning

confidence: 99%

“…The spectra of neutral and singly-ionized argon have been extensively studied over many decades [1][2][3][4][5][6]. Naturally occurring argon is composed of 99.600% 40 Ar, 0.337% 36 Ar and 0.063% 38 Ar.…”

Section: Introductionmentioning

confidence: 99%

“…Three comprehensive Ar I line lists exist with similar wavelength precision: Norlén [4], Li and Humphreys [3] and Whaling et al [6]. Norlén's atlas contains both Ar I and Ar II lines whereas [3,6] contain Ar I lines only.…”

Section: Introductionmentioning

confidence: 99%

“…Norlén's atlas contains both Ar I and Ar II lines whereas [3,6] contain Ar I lines only. Whaling has presented an Ar II line list of comparable accuracy in [5].…”

Section: Introductionmentioning

confidence: 99%

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Fourier Transform Spectroscopy

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Field Guide to Spectroscopy

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Wave numbers and pressure-induced shifts of 19 blue argon emission lines belonging to the 3p 5 6p-3p 5 4s and 3p 5 5p-3p 5 4s transition arrays were measured with high accuracy using a UV/visible Fourier transform spectrometer (FTS). The measurements were made using electrodeless lamps containing traces of 198 Hg and argon at pressures of 33 Pa (1/4 Torr), 400 Pa (3 Torr), 933 Pa (7 Torr) and 1333 Pa (10 Torr). Calibration of the FTS wave number scale was obtained using the four most prominent lines of 198 Hg as internal standards. The pressure-induced shifts of the argon emission lines are in reasonable agreement with theoretical predictions. These results are of importance for astronomers and analytical chemists who use argon lines for practical wavelength standards as well as for theoreticians calculating argon-argon interactions and potential energy curves of diatomic argon molecules.

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“…Figure 1 . The second study was published by Li and Humphreys [3] in 1974. In this experiment 307 Ar I lines were excited in microwave-excited EDLs.…”

Section: Wave Numbersmentioning

confidence: 99%

Section: Interaction Potentialmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Norlén's atlas contains both Ar I and Ar II lines whereas [3,6] contain Ar I lines only. Whaling has presented an Ar II line list of comparable accuracy in [5].…”

Section: Introductionmentioning

confidence: 99%

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Fourier Transform Spectroscopy

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Field Guide to Spectroscopy

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Two-photon absorption of dissociating TLI in strong laser fields

Bovensmann

Tiemann

1994

Z Phys D - Atoms, Molecules and Clusters

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In a strong laser field (I = 2 GW/cm 2) TII is dissociated by a two-photon process and the T1 fragment is detected state specifically. The yield of T1 6p 2P3/2 (TI*) is measured as a function of the dissociation wavelength (480 nm-540 nm). If the dissociation wavelength is close to two-photon transitions of the T1 atom from 6p 2P3/2 to np 2p1/2,3/2 or mf 2F5/2,7/2, l,~= 10 ... 15, m=7 ... 12 dips in the yield are observed. These dips show a significant asymmetric broadening, compared to a free atomic transition and the observation is interpreted as an absorption process of the transient state of dissociating TII during the laser pulse. By applying the Landau-Zener approximation for the potential crossing of dressed molecular states, we are able to describe the broadening and the power density dependence of the observations. Simulations show that the asymmetry is determined by the difference potential of the electronic states which are coupled by the laser field.

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Quasi-stationary detection of transient absorption of a dissociating molecule

Bovensmann

Tiemann

1995

Z Phys D - Atoms, Molecules and Clusters

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Using the forth harmonic ofa Nd-YAG laser at 266 nm TII was dissociated and the dissociation was observed by a transient absorption due to a transition from the repulsive potential, which correlates to T1 (6p2p~/2) and I, to the repulsive potential with the asymptote T1 (7s) and I. The experiment is performed with quasi-stationary spectroscopy in the nanosecond time domain, but detects transients effects by asymmetric absorption profiles in the frequency domain. Simulations applying Bloch equations with time dependent molecular energies are able to reproduce the observations and give information on the difference potential between the two molecular states involved and the transition dipole moment. The results are also in good agreement with fs experiments from other authors.

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New interferometric observations of Ar i in the photographic region*

Cited by 18 publications

References 13 publications

Fourier Transform Spectroscopy

Fourier Transform Spectroscopy

Two-photon absorption of dissociating TLI in strong laser fields

Quasi-stationary detection of transient absorption of a dissociating molecule

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