High resolution electronic study of 16O14N16O, 16O14N18O and 18O14N18O: A rovibronic survey covering 11800–14380cm−1

Volkers, E.; Bulthuis, J.; Stolte, S.; Jost, R.; Linnartz, H.

doi:10.1016/j.jms.2006.03.012

Cited by 4 publications

(4 citation statements)

References 30 publications

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“…An existing set-up (Volkers et al 2004) designed for time-gated fluorescence spectroscopy of isotopologues of atmospheric interest (Volkers et al 2006) has been modified by implementing a supersonic plasma source. This plasma source has been used previously to study vibrationally excited radicals at low rotational temperatures (Bazalgette Courrèges-Lacoste et al 2001) and consists of a General Valve introducing a gas pulse in a multi-layer discharge geometry.…”

Section: Laboratory Experimentsmentioning

confidence: 99%

C₂emission features in the Red Rectangle

Wehres

Romanzin

Linnartz

et al. 2010

A&A

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Context. The Red Rectangle proto-planetary nebula (HD 44179) is known for a number of rather narrow emission features superimposed on a broad extended red emission (ERE) covering the 5000-7500 Å regime. The origin of these emission features is unknown. Aims. The aim of the present work is to search for potential carriers by combining new observational and laboratory data. This also allows to interpret spectral emission features in terms of actual physical conditions like temperature and density constraints and to trace chemical processes in the outflows of the Red Rectangle. Methods. Observational spectra have been obtained with the EMMI-NTT at offsets of 3 , 6 , 7 , 11 , 16 and 20 distance to the central star HD 44179. The spectra are compared to the outcome of a time-gated laser induced fluorescence laboratory study of an expanding acetylene plasma using a special supersonic pin-hole discharge source. With this set-up the hydrocarbon chemistry in the Red Rectangle nebula is simulated under laboratory controlled conditions. The plasma source has the unique feature to generate electronically and vibrationally excited species at low rotational temperatures. The comparison is facilitated by a simple model for fluorescent emission in the nebula. Results. Two of the astronomically observed narrow emission bands can be assigned as originating from unresolved rovibronic progressions within the d 3 Π g → a 3 Π u Swan system of the C 2 radical. The band appearance corresponds to a rotational temperature between 200 and 1000 K. The emission is driven by absorption in the C 2 Phillips bands followed by intersystem crossing from the singlet to the triplet state and pumping in the Swan bands. Conclusions. These observations imply an active (photo)chemistry in the ejecta of the Red Rectangle.

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Section: Laboratory Experimentsmentioning

confidence: 99%

C₂emission features in the Red Rectangle

Wehres

Romanzin

Linnartz

et al. 2010

A&A

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“…296,350 Other species are also involved, such as SiCH by Merer, 351 O 3 by Barbe 215,352 and NO 2 by Jost. 353,354 The case of ozone is typical of that of a molecule demonstrating pervasive Coriolis couplings, severely impacting the polyad structure even to the point of making it difficult to apply the polyad concept.…”

Section: B Global Vibration-rotation Polyad Hamiltoniansmentioning

confidence: 99%

Molecular spectroscopy and dynamics: a polyad-based perspective

Herman

Perry

2013

Phys. Chem. Chem. Phys.

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The efficiency and insight of global, polyad-based modeling in overtone spectroscopy and dynamics is demonstrated. Both vibration and vibration-rotation polyads are considered. The spectroscopic implications of polyad Hamiltonians derive from their ability to account for the detailed line positions and intensities of spectral features and their unique predictive power. The dynamical implications of polyad Hamiltonians include classical bifurcations that lead to the birth of new vibrational modes and intramolecular vibrational-rotational energy redistribution over multiple timescales. The literature is reviewed, with emphasis on acetylene results.

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“…The near infrared region is spectroscopically particularly interesting. Around only 10000 cm −1 , the two lowest electronic states of NO 2 cross with a conical intersection [ 21 , 40 ]. This conical intersection leads to unusual effects including a breakdown of standard spectroscopic theory [ 21 ], so that the line-by-line analysis of the rovibronic bands of the A-X transition in the near-infrared (although fully resolved at Doppler-limited resolution [ 21 ]) has not been successful until today.…”

Section: Introductionmentioning

confidence: 99%

“…In 1976, Hardwick and Brand [ 42 ] predicted the band centers of 25 bands of 18 O 14 N 18 O between 722 cm −1 and 5854 cm −1 . In 2006, Volkers et al measured the high-resolution spectra of N 16 O 2 , 16 O 14 N 18 O, 18 O 14 N 18 O in the spectral region between 11800 and 14380 cm −1 [ 40 ]. More recently Marinina et al [ 43 ] reported the Fourier transform IR spectra in the 1540–1640 cm −1 spectral region were the ν 3 band of 16 O 14 N 18 O is located.…”

Section: Introductionmentioning

confidence: 99%

Experimental observation of the ν1+3ν3 combination bands of 16O14N18O and 18O14N18O in the near infrared spectral region

Chandran,

Orphal,

Ruth

2024

Heliyon

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High resolution electronic study of 16O14N16O, 16O14N18O and 18O14N18O: A rovibronic survey covering 11800–14380cm−1

Cited by 4 publications

References 30 publications

C₂emission features in the Red Rectangle

C₂emission features in the Red Rectangle

Molecular spectroscopy and dynamics: a polyad-based perspective

Experimental observation of the ν1+3ν3 combination bands of 16O14N18O and 18O14N18O in the near infrared spectral region

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High resolution electronic study of 16O14N16O, 16O14N18O and 18O14N18O: A rovibronic survey covering 11800–14380cm−1

Cited by 4 publications

References 30 publications

C2emission features in the Red Rectangle

C2emission features in the Red Rectangle

Molecular spectroscopy and dynamics: a polyad-based perspective

Experimental observation of the ν1+3ν3 combination bands of 16O14N18O and 18O14N18O in the near infrared spectral region

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Product

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C₂emission features in the Red Rectangle

C₂emission features in the Red Rectangle