Rotationally Resolved REMPI Spectra of CaH in a Molecular Beam

Pereira, R.; Skowronek, S.; Ureña, A. González; Poyato, J.M.L.; Pardo, A.

doi:10.1006/jmsp.2002.8531

Cited by 11 publications

(7 citation statements)

References 15 publications

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“…These works provided very accurate experimental measurements of rovibronic frequencies with a very thorough analysis. Other experimental work include spectra and analysis of the A ‐ X and B ‐ X systems of CaH and CaD (Berg & Klynning ; Berg, Klynning & Martin ; Klynning & Martin ; Martin ; Pereira et al ; Gasmi et al ); ultraviolet‐absorption spectra of the C , D , K , L , G , J and M bands of CaH (Kaving & Lindgren , ; Kaving, Lindgren & Ramsay ; Bell, Herman, Johns & Peck ; Kaving & Lindgren ); magnetic hyperfine structure of the A ‐ X and B ‐ X spectra of CaH (Steimle et al ; Chen et al ); and the IR (Petitprez et al ; Frum & Pickett ) and millimetre‐wave (Barclay, Anderson & Ziurys ; Frum et al ) transitions within the ground electronic state.…”

Section: Introductionmentioning

confidence: 99%

ExoMol line lists - I. The rovibrational spectrum of BeH, MgH and CaH in theX ²Σ⁺state

Yadin¹,

Veness²,

Conti³

et al. 2012

Monthly Notices of the Royal Astronomical Society

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Accurate line lists for three molecules, BeH, MgH and CaH, in their ground electronic states are presented. These line lists are suitable for temperatures relevant to exoplanetary atmospheres and cool stars (up to 2000 K). A combination of empirical and ab initio methods is used. The rovibrational energy levels of BeH, MgH and CaH are computed using the programs level and dpotfit in conjunction with ‘spectroscopic’ potential energy curves (PECs). The PEC of BeH is taken from the literature, while the PECs of CaH and MgH are generated by fitting to the experimental transition energy levels. Both spin‐rotation interactions (except for BeH, for which it is negligible) and non‐adiabatic corrections are explicitly taken into account. Accurate line intensities are generated using newly computed ab initio dipole moment curves for each molecule using high levels of theory. Full line lists of rotation–vibration transitions for 9BeH, 24MgH, 25MgH, 26MgH and 40CaH are made available in an electronic form as supporting information to this paper and at http://www.exomol.com.

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Section: Introductionmentioning

confidence: 99%

ExoMol line lists - I. The rovibrational spectrum of BeH, MgH and CaH in theX ²Σ⁺state

Yadin¹,

Veness²,

Conti³

et al. 2012

Monthly Notices of the Royal Astronomical Society

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“…The diatomic reaction products CaH and CaD were expanded to form a supersonic beam and were probed, exploiting the (1 + 1‘) REMPI excitation path CaR ( X 2 Σ + ) → CaR ( B 2 Σ + , A 2 Π ) → CaR + ( X 1 Σ + ). Some early experimental results for CaH that are related to this study, and their preliminary analysis, have been reported recently …”

Section: Introductionmentioning

confidence: 62%

“…Note that, in principle, it would be possible to compare the spin splitting results obtained in this work with those displayed/discussed in Figure 7 in the work of Martin; because of the much higher equilibrium temperature in the reaction that yields CaH, rotational levels up to N ‘ ≈ 30 were evaluated, based on experimental data of that work and earlier measurements …”

Section: Resultsmentioning

confidence: 95%

Rotationally Resolved (1 + 1‘) Resonance-Enhanced Multiphoton Ionization (REMPI) of CaR (R = H, D) in Supersonic Beams: CaR X ²Σ⁺ (υ‘ ‘ = 0) → CaR^* B ²Σ⁺ (υ‘= 0, 1) → CaR⁺ X Σ⁺

Gasmi¹,

Al-Tuwirqi²,

Skowronek³

et al. 2003

J. Phys. Chem. A

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We report on a laser-spectroscopic study of the CaH and CaD radicals in a supersonic beam, generated in a reaction of laser-sputtered Ca atoms and a pulsed beam of H2 or D2, seeded in helium. The rotational levels of the electronic ground-state X 2Σ+ (υ‘ ‘ = 0, N‘ ‘ ≤ 10) were probed by two-color resonance ionization mass spectrometry(1 + 1‘) resonance-enhanced multiphonon ionization (REMPI)via the intermediate B 2Σ+ (υ ‘ = 0, 1) rovibronic levels. Rotational constants for the B-state were derived, including the spin splitting parameters γ υ ‘, which have been determined in the case of CaD for the first time: γ0 = −0.409(7) cm-1 and γ1 = −0.398(8) cm-1 for CaD (B Σ+), and γ0 = −0.792(15) cm-1 and γ1 = −0.765(16) cm-1 for CaH (B 2Σ+). The comparison between the rotational level energies of the F1 and F2 spin substates of the two isotopomers revealed the onset of perturbation in CaH B 2Σ+ (υ ‘ = 0), at N‘ ≅ 0, by the presence of the vibronic state A 2Π (υ ‘ = 1). Although this perturbation is documented for υ‘ ≥ 1, it had not been previously recognized for υ‘ = 0. The rotational populations observed in X 2Σ+ (υ‘ ‘ = 0) for the two isotopomers could be associated with different average rotational temperature values for CaD and CaH: T rot = 52 (± 7) and T rot = 85 (± 11) K, respectively.

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“…High-energy resolution of the (1 + 1') REMPI spectra corresponding to the A 2 P-X 2 R transitions were measured, which allowed for the first time a clear and precise analysis of the low-rotational part [4].…”

Section: Introductionmentioning

confidence: 99%

Time-resolved study of the A2Π state of CaH by laser spectroscopy

Liu¹,

Pauchard²,

Sjödin³

et al. 2009

Journal of Molecular Spectroscopy

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Rotationally Resolved REMPI Spectra of CaH in a Molecular Beam

Cited by 11 publications

References 15 publications

ExoMol line lists - I. The rovibrational spectrum of BeH, MgH and CaH in theX ²Σ⁺state

ExoMol line lists - I. The rovibrational spectrum of BeH, MgH and CaH in theX ²Σ⁺state

Rotationally Resolved (1 + 1‘) Resonance-Enhanced Multiphoton Ionization (REMPI) of CaR (R = H, D) in Supersonic Beams: CaR X ²Σ⁺ (υ‘ ‘ = 0) → CaR^* B ²Σ⁺ (υ‘= 0, 1) → CaR⁺ X Σ⁺

Time-resolved study of the A2Π state of CaH by laser spectroscopy

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Rotationally Resolved REMPI Spectra of CaH in a Molecular Beam

Cited by 11 publications

References 15 publications

ExoMol line lists - I. The rovibrational spectrum of BeH, MgH and CaH in theX 2Σ+state

ExoMol line lists - I. The rovibrational spectrum of BeH, MgH and CaH in theX 2Σ+state

Rotationally Resolved (1 + 1‘) Resonance-Enhanced Multiphoton Ionization (REMPI) of CaR (R = H, D) in Supersonic Beams: CaR X 2Σ+ (υ‘ ‘ = 0) → CaR* B 2Σ+ (υ‘= 0, 1) → CaR+ X Σ+

Time-resolved study of the A2Π state of CaH by laser spectroscopy

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ExoMol line lists - I. The rovibrational spectrum of BeH, MgH and CaH in theX ²Σ⁺state

ExoMol line lists - I. The rovibrational spectrum of BeH, MgH and CaH in theX ²Σ⁺state

Rotationally Resolved (1 + 1‘) Resonance-Enhanced Multiphoton Ionization (REMPI) of CaR (R = H, D) in Supersonic Beams: CaR X ²Σ⁺ (υ‘ ‘ = 0) → CaR^* B ²Σ⁺ (υ‘= 0, 1) → CaR⁺ X Σ⁺