DESIRS : a state-of-the-art VUV beamline featuring high resolution and variable polarization for spectroscopy and dichroism at SOLEIL

Nahon, Laurent; Oliveira, N. de; Garcı́a, Gustavo; Gil, J. F.; Joyeux, D.; Lagarde, Bruno; Polack, F.

doi:10.1088/1742-6596/425/12/122004

Cited by 70 publications

(101 citation statements)

References 20 publications

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“…The experimental setup, the VUV-FTS end-station of the highresolution absorption spectroscopy branch of the DESIRS beamline at the SOLEIL Synchrotron, is described in several publications (de Oliveira et al 2009(de Oliveira et al , 2011Nahon et al 2012Nahon et al , 2013 in detail. An extended description of its specific use for CO measurements is presented in E12 and in Gavilan et al (2013).…”

Section: Methodsmentioning

confidence: 99%

High-resolution study of oscillator strengths and predissociation rates for¹³C¹⁶O and¹²C¹⁸O

Eidelsberg

Lemaire

Federman

et al. 2014

A&A

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Models of astronomical environments containing CO require accurate molecular data to reproduce and interpret observations. We conduct experiments at the SOLEIL synchrotron facility to acquire data to model CO photochemistry in the vacuum ultraviolet. The improvement in UV spectroscopic instrumentation in both sensitivity and resolution provides more accurate laboratory spectroscopic determinations. We continue our work on photoabsorption oscillator strengths and predissociation rates for 12 C 16 O; we report new measurements for two additional isotopologues, 13 C 16 O and 12 C 18 O, of four bands from X 1 Σ + (v = 0) to the v = 0-3 vibrational levels of the core-excited W 1 Π Rydberg state and for four overlapping bands (three resolved and one diffuse) between 92.97 and 93.35 nm. Some of the latter include unidentified perturbations. Absorption spectra were recorded using the vacuum-ultraviolet Fourier-transform spectrometer that is installed on the DESIRS beamline at SOLEIL which provides a resolving power R = 350 000. This resolution allows the analysis of individual line strengths and widths in the electronic transitions and the identification of a previously unobserved perturbation in the W(1) level. Gas column densities in the differentially-pumped system were calibrated using the B 1 Σ + -X 1 Σ + (v = 0,v = 0) band. Absorption bands are analyzed by synthesizing line and band profiles and fitting them to the measured spectra. These considerably improved results are compared with earlier determinations.

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Section: Methodsmentioning

confidence: 99%

High-resolution study of oscillator strengths and predissociation rates for¹³C¹⁶O and¹²C¹⁸O

Eidelsberg

Lemaire

Federman

et al. 2014

A&A

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“…The photochemistry is probed through observations of its isotopologues (e.g., 12 C 16 O, 13 C 16 O, 12 C 18 O, etc.). A crucial need of the astronomical community involves accurate oscillator strengths for 13 C 16 O.…”

Section: Introductionmentioning

confidence: 99%

“…1,2 These molecular data are required for analysis of spectra acquired with the UV instrument HST-COS (Cosmic Origins Spectrograph). 3 Our groups have measured the fourth-positive A 1 Π−X 1 Σ + f values in 12 C 16 O, 4−7 but no f value measurements have ever been undertaken for 13 C 16 O. There are only calculations based on 12 C 16 O results in the compilation by Morton and Noreau.…”

Section: Introductionmentioning

confidence: 99%

“…3 Our groups have measured the fourth-positive A 1 Π−X 1 Σ + f values in 12 C 16 O, 4−7 but no f value measurements have ever been undertaken for 13 C 16 O. There are only calculations based on 12 C 16 O results in the compilation by Morton and Noreau. 8 We are acquiring the necessary data for f values, and we will report on them in subsequent publications.…”

Section: Introductionmentioning

confidence: 99%

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High-Resolution Study of ¹³C¹⁶O A–X(v′ = 0–9) Bands Using the VUV-FTS at SOLEIL: Revised Term Values

et al. 2013

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We present high-resolution absorption spectral measurements of the A(1)Π-X(1)Σ(+) band system of (13)C(16)O. These were recorded with the VUV Fourier transform spectrometer (VUV-FTS) installed on the DESIRS beamline at the SOLEIL synchrotron. This work includes revised term values that extend to higher J' values than previous measurements for most v' levels and lower J' values for v' = 0. We confirm previously observed perturbations of the rotational levels in greater detail and present evidence for new perturbations. The accuracy in the wavelength determination and term values is on average within 0.01 cm(-1), improving upon previous measurements.

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“…The MPc systems therefore represent the perfect candidates to study one photon two electron photodetachment at low energy. Here we use linear ion trap mass spectrometers coupled to either an OPO laser 21 or a vacuum UV line of SOLEIL 22,23 to explore while that for 2 electron loss is shown in Figure 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 7 Figure S4). Since thermal electron loss from the metastable [NiPc] 4-anion is observed on the experimental timescale, fitting a threshold for 1 electron loss is not possible as it relies on a smooth baseline.…”

mentioning

confidence: 99%

Single-Photon, Double Photodetachment of Nickel Phthalocyanine Tetrasulfonic Acid 4- Anions

Daly

Girod

Vojković

et al. 2016

J. Phys. Chem. Lett.

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Single-photon, two-electron photodetachment from nickel phthalocyanine tetrasulfonic acid tetra anions, [NiPc](4-), was examined in the gas-phase using a linear ion trap coupled to the DESIRS VUV beamline of the SOLEIL Synchrotron. This system was chosen since it has a low detachment energy, known charge localization, and well-defined geometrical and electronic structures. A threshold for two-electron loss is observed at 10.2 eV, around 1 eV lower than previously observed double detachment thresholds on multiple charged protein anions. The photodetachment energy of [NiPc](4-) has been previously determined to be 3.5 eV and the photodetachment energy of [NiPc](3-•) is determined in this work to be 4.3 eV. The observed single photon double electron detachment threshold is hence 5.9 eV higher than the energy required for sequential single electron loss. Possible mechanisms are for double photodetachment are discussed. These observations pave the way toward new, exciting experiments for probing double photodetachment at relatively low energies, including correlation measurements on emitted photoelectrons.

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DESIRS : a state-of-the-art VUV beamline featuring high resolution and variable polarization for spectroscopy and dichroism at SOLEIL

Cited by 70 publications

References 20 publications

High-resolution study of oscillator strengths and predissociation rates for¹³C¹⁶O and¹²C¹⁸O

High-resolution study of oscillator strengths and predissociation rates for¹³C¹⁶O and¹²C¹⁸O

High-Resolution Study of ¹³C¹⁶O A–X(v′ = 0–9) Bands Using the VUV-FTS at SOLEIL: Revised Term Values

Single-Photon, Double Photodetachment of Nickel Phthalocyanine Tetrasulfonic Acid 4- Anions

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DESIRS : a state-of-the-art VUV beamline featuring high resolution and variable polarization for spectroscopy and dichroism at SOLEIL

Cited by 70 publications

References 20 publications

High-resolution study of oscillator strengths and predissociation rates for13C16O and12C18O

High-resolution study of oscillator strengths and predissociation rates for13C16O and12C18O

High-Resolution Study of 13C16O A–X(v′ = 0–9) Bands Using the VUV-FTS at SOLEIL: Revised Term Values

Single-Photon, Double Photodetachment of Nickel Phthalocyanine Tetrasulfonic Acid 4- Anions

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High-resolution study of oscillator strengths and predissociation rates for¹³C¹⁶O and¹²C¹⁸O

High-resolution study of oscillator strengths and predissociation rates for¹³C¹⁶O and¹²C¹⁸O

High-Resolution Study of ¹³C¹⁶O A–X(v′ = 0–9) Bands Using the VUV-FTS at SOLEIL: Revised Term Values