The millimeter and sub-millimeter spectrum of the BaOH radical

M. A. Anderson; M. D. Allen; W. L. Barcaly; L. M. Ziurys

doi:10.1016/0009-2614(93)87144-R

The millimeter and sub-millimeter spectrum of the BaOH radical

M. A. Anderson, M. D. Allen, W. L. Barcaly, L. M. Ziurys

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Abstract

The pure rotational spectrum of the X²Σ⁺ ground electronic states of the BaOH and BaOD radicals has been observed using millimeter/sub-millimeter direct absorption spectroscopy. The lesser abundant isotopically substituted species, ¹³⁶BaOH and ¹³⁷BaOH, have been detected as well. The radicals were created by reacting barium metal vapor, produced in a Broida-type oven, with either H₂O₂ or D₂O₂. The rotational and spin-rotation constants were determined for the molecules from a nonlinear leastsquares fit to the data, using a ²Σ Hamiltonian. Hyperfine constants were also derived for ¹³⁷BaOH, the one species where hyperfine structure was resolved. These measurements confirm a linear structure for BaOh.

Original language	English (US)
Pages (from-to)	415-422
Number of pages	8
Journal	Chemical Physics Letters
Volume	205
Issue number	4-5
DOIs	https://doi.org/10.1016/0009-2614(93)87144-R
State	Published - Apr 16 1993

ASJC Scopus subject areas

General Physics and Astronomy
Physical and Theoretical Chemistry

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title = "The millimeter and sub-millimeter spectrum of the BaOH radical",

abstract = "The pure rotational spectrum of the X2Σ+ ground electronic states of the BaOH and BaOD radicals has been observed using millimeter/sub-millimeter direct absorption spectroscopy. The lesser abundant isotopically substituted species, 136BaOH and 137BaOH, have been detected as well. The radicals were created by reacting barium metal vapor, produced in a Broida-type oven, with either H2O2 or D2O2. The rotational and spin-rotation constants were determined for the molecules from a nonlinear leastsquares fit to the data, using a 2Σ Hamiltonian. Hyperfine constants were also derived for 137BaOH, the one species where hyperfine structure was resolved. These measurements confirm a linear structure for BaOh.",

author = "Anderson, {M. A.} and Allen, {M. D.} and Barcaly, {W. L.} and Ziurys, {L. M.}",

note = "Funding Information: This research was supported by NFS grants AST-90-58467 (Presidential Young Investigator Award) and AST-10701, and NASA grant NAGW 2989. MAA and WLB acknowledge the NASA Space Grant Program at ASU for their fellowships.",

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doi = "10.1016/0009-2614(93)87144-R",

language = "English (US)",

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pages = "415--422",

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T1 - The millimeter and sub-millimeter spectrum of the BaOH radical

AU - Anderson, M. A.

AU - Allen, M. D.

AU - Barcaly, W. L.

AU - Ziurys, L. M.

N1 - Funding Information: This research was supported by NFS grants AST-90-58467 (Presidential Young Investigator Award) and AST-10701, and NASA grant NAGW 2989. MAA and WLB acknowledge the NASA Space Grant Program at ASU for their fellowships.

PY - 1993/4/16

Y1 - 1993/4/16

N2 - The pure rotational spectrum of the X2Σ+ ground electronic states of the BaOH and BaOD radicals has been observed using millimeter/sub-millimeter direct absorption spectroscopy. The lesser abundant isotopically substituted species, 136BaOH and 137BaOH, have been detected as well. The radicals were created by reacting barium metal vapor, produced in a Broida-type oven, with either H2O2 or D2O2. The rotational and spin-rotation constants were determined for the molecules from a nonlinear leastsquares fit to the data, using a 2Σ Hamiltonian. Hyperfine constants were also derived for 137BaOH, the one species where hyperfine structure was resolved. These measurements confirm a linear structure for BaOh.

AB - The pure rotational spectrum of the X2Σ+ ground electronic states of the BaOH and BaOD radicals has been observed using millimeter/sub-millimeter direct absorption spectroscopy. The lesser abundant isotopically substituted species, 136BaOH and 137BaOH, have been detected as well. The radicals were created by reacting barium metal vapor, produced in a Broida-type oven, with either H2O2 or D2O2. The rotational and spin-rotation constants were determined for the molecules from a nonlinear leastsquares fit to the data, using a 2Σ Hamiltonian. Hyperfine constants were also derived for 137BaOH, the one species where hyperfine structure was resolved. These measurements confirm a linear structure for BaOh.

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The millimeter and sub-millimeter spectrum of the BaOH radical

Abstract

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