Terahertz spectroscopy of the CHD radical (\hbox{$\widetilde{\textit{X}}^{\,\mathsf{3}}\textit{A}''$})

Ozeki, Hiroyuki; Bailleux, S.; Wlodarczak, G.

doi:10.1051/0004-6361/201016043

Cited by 8 publications

(12 citation statements)

References 28 publications

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“…Details of the submillimeter-wave spectrometer employed in this study have been described previously by Ozeki et al (2011). Briefly speaking, it consists of a 2 m free space, double-jacketed Pyrex cell allowing liquid-nitrogen flow through the outer jacket, a liquid He-cooled InSb hot electron bolometer, and a submillimeter-wave source.…”

Section: Laboratory Spectroscopymentioning

confidence: 99%

Tentative Detection of the Nitrosylium Ion in Space

Cernicharo¹,

Bailleux²,

Alekseev³

et al. 2014

ApJ

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We report the tentative detection in space of the nitrosylium ion, NO + . The observations were performed towards the cold dense core Barnard 1-b. The identification of the NO + J=2-1 line is supported by new laboratory measurements of NO + rotational lines up to the J=8-7 transition (953207.189 MHz), which leads to an improved set of molecular constants: B 0 = 59597.1379(62) MHz, D 0 = 169.428(65) kHz, and eQq 0 (N) = −6.72(15) MHz. The profile of the feature assigned to NO + exhibits two velocity components at 6.5 and 7.5 km s −1 , with column densities of 1.5 × 10 12 and 6.5 × 10 11 cm −2 , respectively. New observations of NO and HNO, also reported here, allow to estimate the following abundance ratios: X(NO)/X(NO + )≃ 511, and

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Section: Laboratory Spectroscopymentioning

confidence: 99%

Tentative Detection of the Nitrosylium Ion in Space

Cernicharo¹,

Bailleux²,

Alekseev³

et al. 2014

ApJ

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“…Two such discharge cells were used for Fouriertransform FIR (FT-FIR) and submillimeter-wave spectroscopy. A description of the cells can be found in Martin-Drumel et al (2011) and Ozeki et al (2011), respectively. Briefly, for FT-FIR spectroscopy the 1-m-long, White-type cell available at SOLEIL allowed a 24 m absorption path length in the positive column of the discharge.…”

Section: Production Of the Radicalmentioning

confidence: 99%

“…It was phase-locked to a harmonic of an Agilent E8257D synthesizer (2−20 GHz) (Ozeki et al 2011). Additional measurements between 660 and 990 GHz were performed using a solid state source (Motiyenko et al 2010).…”

Section: Submillimeter-wave Spectroscopymentioning

confidence: 99%

Terahertz spectroscopy of the¹⁵NH₂amidogen radical

Margulès

Martin‐Drumel

Pirali

et al. 2016

A&A

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Context. The determination of isotopic ratios in interstellar molecules is a powerful probe of chemical routes leading to their formation. In particular, the 14 N/ 15 N abundance ratio of nitrogen-bearing species provides information on possible fractionation mechanisms. Up to now there is no accurate determination of this ratio in the interstellar medium (ISM) for the amidogen radical, NH 2 . Aims. This work is aimed at determining rotational frequencies of 15 NH 2 to enable its astronomical detection, which will help to understand the formation mechanisms of nitrogen hydrides in the ISM. Methods. We performed complementary measurements using both synchrotron-based, broadband far-infrared and high-resolution, submillimeter-wave frequencies to investigate the pure rotational spectrum of the 15 NH 2 species. Results. The first spectroscopic study of the 15 N-isotopologue of the amidogen radical yielded an accurate set of molecular parameters. Conclusions. Accurate frequencies are now available for 15 NH 2 up to 7 THz (with N ≤ 13) allowing dedicated astronomical searches to be undertaken.

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“…Given the submillimetre-wave radiation sources available, unfortunately only the J = 0 ← 1 finestructure component of the ground-state transition could be observed. The PhLAM spectrometer (150-660 GHz) has been extensively described elsewhere (Ozeki et al 2011). In this study, an all-solid-state frequency multiplier chain was used to carry out measurements below 950 GHz, the upper limit of our spectrometer.…”

Section: Methodsmentioning

confidence: 99%

High-resolution terahertz spectroscopy of the¹⁵NH radical (\hbox{$\widetilde{\rm X}~ ^{3}$}Σ⁻)

Bailleux¹,

Martin‐Drumel²,

Margulès³

et al. 2012

A&A

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Context. High-resolution rotational spectroscopy of the imidogen radical has been limited to the 14 15 NH was generated in a positive column discharge in a flowing 15 NH 3 -He (SOLEIL synchrotron) or 15 NH 3 -Ar (PhLAM) mixture. High-resolution spectroscopic study of the 15 NH isotopologue of imidogen in its ground electronic and vibrational state ( X 3 Σ − ) was carried out in the THz range (up to 225 cm −1 ) with the AILES beamline of the SOLEIL synchrotron and subsequently with the PhLAM spectrometer (around 942 GHz). The observed fine and hyperfine structures were analysed, yielding an accurate set of rotational, fine, and hyperfine parameters. Results. The reported frequencies and molecular constants are suitable for radioastronomical searches of this key species and for 14 N/ 15 N isotopic ratio astronomical determination.

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Terahertz spectroscopy of the CHD radical (\hbox{$\widetilde{\textit{X}}^{\,\mathsf{3}}\textit{A}''$})

Cited by 8 publications

References 28 publications

Tentative Detection of the Nitrosylium Ion in Space

Tentative Detection of the Nitrosylium Ion in Space

Terahertz spectroscopy of the¹⁵NH₂amidogen radical

High-resolution terahertz spectroscopy of the¹⁵NH radical (\hbox{$\widetilde{\rm X}~ ^{3}$}Σ⁻)

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Terahertz spectroscopy of the CHD radical (\hbox{$\widetilde{\textit{X}}^{\,\mathsf{3}}\textit{A}''$})

Cited by 8 publications

References 28 publications

Tentative Detection of the Nitrosylium Ion in Space

Tentative Detection of the Nitrosylium Ion in Space

Terahertz spectroscopy of the15NH2amidogen radical

High-resolution terahertz spectroscopy of the15NH radical (\hbox{$\widetilde{\rm X}~ ^{3}$}Σ−)

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Terahertz spectroscopy of the¹⁵NH₂amidogen radical

High-resolution terahertz spectroscopy of the¹⁵NH radical (\hbox{$\widetilde{\rm X}~ ^{3}$}Σ⁻)