High-resolution spectroscopy of molecular hydrogen in the extreme ultraviolet region

Rothschild, M.; Egger, H.; Hawkins, R. T.; Bokor, Jeffrey; Pummer, H.; Rhodes, C. K.

doi:10.1103/physreva.23.206

Cited by 57 publications

(22 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There is good agreement with previously measured values of Rothschild et al [12] and Dehmer and Chupka [11]. The values extracted from the FT absorption spectrum and those from the Ly-α spectrum agree well, thereby confirming experimental consistency.…”

Section: Predissociated Widthssupporting

confidence: 89%

“…Further classical absorption studies conducted on the predissociated widths of D 2 were made by Dehmer and Chupka [11]. Laser based studies were conducted by Rothschild et al [12], employing a laser with bandwidth 0.005 cm −1 yielding accurate information on the predissociated widths for the D 1 Π + u v = 5 state. The Π − u symmetry components of the D 1 Π u system has been studied by emission in the VUV range by Larzillière et al [13] for excited state vibrations v = 5 − 12.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

VUV Spectroscopic Study of theD¹Π_uState of Molecular Deuterium

et al. 2011

View full text Add to dashboard Cite

The D 1 Πu -X 1 Σ + g absorption system of molecular deuterium has been re-investigated using the VUV Fourier -Transform (FT) spectrometer at the DESIRS beamline of the synchrotron SOLEIL and photon-induced fluorescence spectrometry (PIFS) using the 10 m normal incidence monochromator at the synchrotron BESSY II. Using the FT spectrometer absorption spectra in the range 72 -82 nm were recorded in quasi static gas at 100 K and in a free flowing jet at a spectroscopic resolution of 0.50 and 0.20 cm −1 respectively . The narrow Q-branch transitions, probing states of Π − symmetry, were observed up to vibrational level v = 22. The states of Π + symmetry, known to be broadened due to predissociation and giving rise to asymmetric Beutler-Fano resonances, were studied up to v = 18. The 10 m normal incidence beamline setup at BESSY II was used to simultaneously record absorption, dissociation, ionization and fluorescence decay channels from which information on the line intensities, predissociated widths, and Fano q-parameters were extracted. R-branch transitions were observed up to v = 23 for J = 1-3 as well as several transitions for J = 4 and 5 up to v = 22 and 18 respectively. The Q-branch transitions are found to weakly predissociate and were observed from v = 8 to the final vibrational level of the state v = 23. The spectroscopic study is supported by two theoretical frameworks. Results on the Π − symmetry states are compared to ab initio multi-channel-quantum defect theory (MQDT) calculations, demonstrating that these calculations are accurate to within 0.5 cm −1 . Furthermore, the calculated line intensities of Q-lines agree well with measured values. For the states of Π + symmetry a perturbative model based on a single bound state interacting with a predissociation continuum was explored, yielding good agreement for predissociation widths, Fano q-parameters and line intensities.

show abstract

Section: Predissociated Widthssupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

VUV Spectroscopic Study of theD¹Π_uState of Molecular Deuterium

et al. 2011

View full text Add to dashboard Cite

show abstract

“…Usually in metal vapours an autoionizing state at hW3 is used to both enhance X (3) and provide the necessary anomalous dispersion for phase matching. This leads to a fairly limited tuning range in these systems,":" over the width of the autoionizing state.…”

Section: Magnesium Vapourmentioning

confidence: 99%

Coherent Vacuum Ultraviolet in Chemical Physics

Hepburn

1984

Israel Journal of Chemistry

View full text Add to dashboard Cite

Abstract. Methods of generating coherent vacuum ultraviolet radiation by frequency mixing techniques are reviewed. The theory and methodology of four-wave mixing in gas mixtures is discussed and some representative methods for generating coherent light in the range from 900 Ato 2000 A are described. In the last section some recent applications of these VUV sources to chemical physics will be outlined.

show abstract

“…Only the B , v = 0 level, lying below the threshold, is unpredissociated. The B − X (2,0) band was investigated by direct one-photon laser excitation in the extreme ultraviolet [6]. Rovibrational levels in the outer well, referred to asB, have been probed by multi-step laser excitation [7,8] and are much longer lived.…”

Section: Introductionmentioning

confidence: 99%

VUV spectroscopic study of the state of H₂

Dickenson

Ubachs

2014

Molecular Physics

View full text Add to dashboard Cite

Spectral lines, probing rotational quantum states J = 0, 1, 2 of the inner well vibrations (v ≤ 8) in the B B 1 + u state of molecular hydrogen, were recorded in high resolution using a vacuum ultraviolet Fourier transform absorption spectrometer in the wavelength range 73-86 nm. Accurate line positions and predissociation widths are determined from a fit to the absorption spectra. Improved values for the line positions are obtained, while the predissociation widths agree well with previous investigations.

show abstract

High-resolution spectroscopy of molecular hydrogen in the extreme ultraviolet region

Cited by 57 publications

References 27 publications

VUV Spectroscopic Study of theD¹Π_uState of Molecular Deuterium

VUV Spectroscopic Study of theD¹Π_uState of Molecular Deuterium

Coherent Vacuum Ultraviolet in Chemical Physics

VUV spectroscopic study of the state of H₂

Contact Info

Product

Resources

About

High-resolution spectroscopy of molecular hydrogen in the extreme ultraviolet region

Cited by 57 publications

References 27 publications

VUV Spectroscopic Study of theD1ΠuState of Molecular Deuterium

VUV Spectroscopic Study of theD1ΠuState of Molecular Deuterium

Coherent Vacuum Ultraviolet in Chemical Physics

VUV spectroscopic study of the state of H2

Contact Info

Product

Resources

About

VUV Spectroscopic Study of theD¹Π_uState of Molecular Deuterium

VUV Spectroscopic Study of theD¹Π_uState of Molecular Deuterium

VUV spectroscopic study of the state of H₂