What question did this study set out to answer?

To identify the A1Π–X1Σ+ electronic transition of the SiH+ molecular ion and determine its molecular constants, dissociation limit, and astrophysical presence.

February 1, 1970Canadian Journal of Physics

Spectroscopic identification of the SiH+ molecule: The A1Π–X1Σ+ system

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Authors

ADA. E. DouglasHerzberg Institute of Astrophysics BLB. L. LutzHerzberg Institute of Astrophysics

Discussion

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Implication

Laboratory emission spectroscopy observes the A1Π–X1Σ+ transition of the SiH+ molecule in silane-helium discharge, suggesting its presence in solar spectra.

Key Points

To identify the A1Π–X1Σ+ electronic transition of the SiH+ molecular ion and determine its molecular constants, dissociation limit, and astrophysical presence.
Generated emission spectra using a hollow-cathode discharge through helium carrier gas containing trace amounts of silane.
Analyzed five rotational-vibrational bands belonging to the A1Π–X1Σ+ band system to calculate upper- and lower-state spectroscopic constants.
Determined ground- and excited-state constants of Be″ = 7.6603 cm−1, ΔG″(1/2) = 2088.69 cm−1, Be′ = 4.9125 cm−1, ΔG′(1/2) = 390.17 cm−1, and band origin ν(0–0) = 25 025.20 cm−1.
Derived a dissociation limit D00(SiH+) of 3.20 ± 0.08 eV and an ionization potential for neutral SiH of 8.01 ± 0.08 eV.
Tentatively identified SiH+ spectral lines in the solar spectrum and evaluated the feasibility of observing interstellar SiH+.

Cite This Study

Douglas et al. (1970) studied this question.

synapsesocial.com/papers/6a9cb5fd46732477b8b67dab https://doi.org/10.1139/p70-034

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February 1, 1970Canadian Journal of Physics

Spectroscopic identification of the SiH+ molecule: The A1Π–X1Σ+ system

View Full Paper

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Authors

ADA. E. DouglasHerzberg Institute of Astrophysics BLB. L. LutzHerzberg Institute of Astrophysics

Discussion

Member takes

Implication

Laboratory emission spectroscopy observes the A1Π–X1Σ+ transition of the SiH+ molecule in silane-helium discharge, suggesting its presence in solar spectra.

Key Points

To identify the A1Π–X1Σ+ electronic transition of the SiH+ molecular ion and determine its molecular constants, dissociation limit, and astrophysical presence.
Generated emission spectra using a hollow-cathode discharge through helium carrier gas containing trace amounts of silane.
Analyzed five rotational-vibrational bands belonging to the A1Π–X1Σ+ band system to calculate upper- and lower-state spectroscopic constants.
Determined ground- and excited-state constants of Be″ = 7.6603 cm−1, ΔG″(1/2) = 2088.69 cm−1, Be′ = 4.9125 cm−1, ΔG′(1/2) = 390.17 cm−1, and band origin ν(0–0) = 25 025.20 cm−1.
Derived a dissociation limit D00(SiH+) of 3.20 ± 0.08 eV and an ionization potential for neutral SiH of 8.01 ± 0.08 eV.
Tentatively identified SiH+ spectral lines in the solar spectrum and evaluated the feasibility of observing interstellar SiH+.

Cite This Study

Douglas et al. (1970) studied this question.

synapsesocial.com/papers/6a9cb5fd46732477b8b67dab https://doi.org/10.1139/p70-034

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