Infrared spectrum and revised energy levels for neutral krypton

Sansonetti, Craig J.; Greene, M.

doi:10.1088/0031-8949/75/5/001

Cited by 12 publications

(5 citation statements)

References 17 publications

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“…The FT spectroscopy energy scale is strictly linear and, in principle, requires a single reference if precise absolute calibration is needed. Such calibration of the spectra is performed by comparing with an absorption line of Kr I present in most spectra, for which an accurate value exists in the literature at 85,846.7055 (2) cm −1 [26]. This value for a natural sample of krypton is in agreement with isotope-specific calibrations by high resolution laser measurements [27].…”

Section: Methodssupporting

confidence: 64%

Fourier-Transform VUV Spectroscopy of 14,15N and 12,13C

Lai

Ubachs

Oliveira

et al. 2020

Atoms

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Accurate Fourier-transform spectroscopic absorption measurements of vacuum ultraviolet transitions in atomic nitrogen and carbon were performed at the Soleil synchrotron. For 14N, transitions from the 2s22p34S3/2 ground state and from the 2s22p32P and 2D metastable states were determined in the 95–124 nm range at an accuracy of 0.025cm−1. The combination of these results with data from previous precision laser experiments in the vacuum ultraviolet range reveals an overall and consistent offset of −0.04 cm−1 from values reported in the NIST database. The splittings of the 2s22p34S3/2 – 2s2p44PJ transitions are well-resolved for 14N and 15N and the isotope shifts determined. While excitation of a 2p valence electron yields very small isotope shifts, excitation of a 2s core electron results in large isotope shifts, in agreement with theoretical predictions. For carbon, six transitions from the ground 2s22p23PJ and 2s22p3s3PJ excited states at 165 nm are measured for both 12C and 13C isotopes.

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Section: Methodssupporting

confidence: 64%

Fourier-Transform VUV Spectroscopy of 14,15N and 12,13C

Lai

Ubachs

Oliveira

et al. 2020

Atoms

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show abstract

“…The FT spectroscopy energy scale is strictly linear and in principle requires a single reference if precise absolute calibration is needed. Such calibration of the spectra is performed by comparing with an absorption line of Kr I present in most spectra, for which an accurate value exists in the literature at 85846.7055 (2) cm −1 [26]. This value for a natural sample of krypton is in agreement with isotope-specific calibrations by high-resolution laser measurements [27].…”

Section: Methodssupporting

confidence: 64%

Fourier-transform VUV spectroscopy of $^{14,15}$N and $^{12,13}$C

Lai¹,

Ubachs²,

Oliveira³

et al. 2020

Preprint

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Accurate Fourier-transform spectroscopic absorption measurements of vacuum ultraviolet transitions in atomic nitrogen and carbon were performed at the Soleil synchrotron. For 14 N transitions from the 2s 2 2p 3 4 S 3/2 ground state and from the 2s 2 2p 3 2 P and 2 D metastable states were determined in the 95 − 124 nm range at an accuracy of 0.025 cm −1 . Combination of these results with data from previous precision laser experiments in the vacuum ultraviolet range reveal an overall and consistent offset of -0.04 cm −1 from values reported in the NIST database. The splittings of the 2s 2 2p 3 4 S 3/2 -2s2p 4 4 PJ transitions are well-resolved for 14 N and 15 N and isotope shifts determined. While excitation of a 2p valence electron yields very small isotope shifts, excitation of a 2s core electron results in large isotope shifts, in agreement with theoretical predictions. For carbon six transitions from the ground 2s 2 2p 2 3 PJ and 2s 2 2p3s 3 PJ excited states at 165 nm are measured for both 12 C and 13 C isotopes.

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“…Emission spectra of Ne and Kr (Sansonetti & Greene 2007) have been studied in detail recently, but the line density and distribution of Ne and Kr lamps are inadequate for high-resolution spectroscopy using IR echelle spectrographs. Thus, the situation in the near-IR is in pronounced contrast to the ultraviolet (UV) and visible regions, where wavelength calibration is usually made using spectra provided by one of a variety of available standard lamps and where the study of the night-sky lines is left to dedicated observations (Hanuschik 2003).…”

Section: Introductionmentioning

confidence: 99%

The Spectrum of Th‐Ar Hollow Cathode Lamps in the 691–5804 nm region: Establishing Wavelength Standards for the Calibration of Infrared Spectrographs

Kerber

Nave

Sansonetti

2008

ASTROPHYS J SUPPL S

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We report new observations of the infrared (IR) spectrum of low-current Th-Ar hollow cathode lamps with the 2 m Fourier transform spectrometer (FTS) at the National Institute of Standards and Technology. These observations establish more than 2400 lines that are suitable for use as wavelength standards in the range 900Y4500 nm. The line list is used as input for a physical instrument model that provides the wavelength calibration for the Cryogenic HighResolution IR Echelle Spectrometer (CRIRES), the European Southern Observatory's new high-resolution (R $ 100;000) IR spectrograph at the Very Large Telescope. We have also observed the variation of the spectrum of Th-Ar lamps as a function of operating current. The results allow us to optimize the spectral output in terms of relative intensity and line density for operation on the telescope. Our results should be generally useful for wavelength calibration in near-IR astronomy, providing a high density of sharp, well-characterized emission lines with the ease and efficiency of operation of a commercial discharge lamp.

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Infrared spectrum and revised energy levels for neutral krypton

Cited by 12 publications

References 17 publications

Fourier-Transform VUV Spectroscopy of 14,15N and 12,13C

Fourier-Transform VUV Spectroscopy of 14,15N and 12,13C

Fourier-transform VUV spectroscopy of $^{14,15}$N and $^{12,13}$C

The Spectrum of Th‐Ar Hollow Cathode Lamps in the 691–5804 nm region: Establishing Wavelength Standards for the Calibration of Infrared Spectrographs

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