Optical stark spectroscopy of the D1Π-X1Σ +(0,0) band of scandium monohydride

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Abstract

The laser induced fluorescence (LIF) spectra of the D1Π- X1Σ+(0,0) band of a rotationally cold (<20 K) molecular beam sample of scandium monohydride, ScH, and scandium monodeuteride, ScD, were recorded without and in the presence of a static electric field. The fine and magnetic hyperfine parameters for the X1Σ +(v=0) and D1Π(v=0) states of ScH and ScD were determined from the analysis of the field-free spectra. An unexpected isotopic dependence of the 45Sc(I=7/2) magnetic hyperfine interaction was observed. The lowest J-levels of the D1Π(v=0) state of ScH are not perturbed, but the corresponding levels for ScD are strongly perturbed. The observed electric field induced splitting, broadenings, and shifts were analyzed to produce permanent electric dipole moments, μe, of 1.74 ± 0.15 and 2.177 ± 0.006 D for the X1Σ +(v=0) and D1Π(v=0) states, respectively. The trend in μ e for the 3d-metal monohydrides is discussed.

Original languageEnglish (US)
Pages (from-to)9370-9376
Number of pages7
JournalJournal of Physical Chemistry A
Volume115
Issue number34
DOIs
StatePublished - Sep 1 2011

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Scandium
scandium
Electric fields
Electric dipole moments
Spectroscopy
Molecular beams
electric fields
electric moments
laser induced fluorescence
electric dipoles
spectroscopy
molecular beams
dipole moments
Metals
Fluorescence
trends
Lasers
shift
metals
interactions

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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Optical stark spectroscopy of the D1Π-X1Σ +(0,0) band of scandium monohydride. / Le, Anh; Steimle, Timothy.

In: Journal of Physical Chemistry A, Vol. 115, No. 34, 01.09.2011, p. 9370-9376.

Research output: Contribution to journalArticle

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title = "Optical stark spectroscopy of the D1Π-X1Σ +(0,0) band of scandium monohydride",
abstract = "The laser induced fluorescence (LIF) spectra of the D1Π- X1Σ+(0,0) band of a rotationally cold (<20 K) molecular beam sample of scandium monohydride, ScH, and scandium monodeuteride, ScD, were recorded without and in the presence of a static electric field. The fine and magnetic hyperfine parameters for the X1Σ +(v=0) and D1Π(v=0) states of ScH and ScD were determined from the analysis of the field-free spectra. An unexpected isotopic dependence of the 45Sc(I=7/2) magnetic hyperfine interaction was observed. The lowest J-levels of the D1Π(v=0) state of ScH are not perturbed, but the corresponding levels for ScD are strongly perturbed. The observed electric field induced splitting, broadenings, and shifts were analyzed to produce permanent electric dipole moments, μe, of 1.74 ± 0.15 and 2.177 ± 0.006 D for the X1Σ +(v=0) and D1Π(v=0) states, respectively. The trend in μ e for the 3d-metal monohydrides is discussed.",
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N2 - The laser induced fluorescence (LIF) spectra of the D1Π- X1Σ+(0,0) band of a rotationally cold (<20 K) molecular beam sample of scandium monohydride, ScH, and scandium monodeuteride, ScD, were recorded without and in the presence of a static electric field. The fine and magnetic hyperfine parameters for the X1Σ +(v=0) and D1Π(v=0) states of ScH and ScD were determined from the analysis of the field-free spectra. An unexpected isotopic dependence of the 45Sc(I=7/2) magnetic hyperfine interaction was observed. The lowest J-levels of the D1Π(v=0) state of ScH are not perturbed, but the corresponding levels for ScD are strongly perturbed. The observed electric field induced splitting, broadenings, and shifts were analyzed to produce permanent electric dipole moments, μe, of 1.74 ± 0.15 and 2.177 ± 0.006 D for the X1Σ +(v=0) and D1Π(v=0) states, respectively. The trend in μ e for the 3d-metal monohydrides is discussed.

AB - The laser induced fluorescence (LIF) spectra of the D1Π- X1Σ+(0,0) band of a rotationally cold (<20 K) molecular beam sample of scandium monohydride, ScH, and scandium monodeuteride, ScD, were recorded without and in the presence of a static electric field. The fine and magnetic hyperfine parameters for the X1Σ +(v=0) and D1Π(v=0) states of ScH and ScD were determined from the analysis of the field-free spectra. An unexpected isotopic dependence of the 45Sc(I=7/2) magnetic hyperfine interaction was observed. The lowest J-levels of the D1Π(v=0) state of ScH are not perturbed, but the corresponding levels for ScD are strongly perturbed. The observed electric field induced splitting, broadenings, and shifts were analyzed to produce permanent electric dipole moments, μe, of 1.74 ± 0.15 and 2.177 ± 0.006 D for the X1Σ +(v=0) and D1Π(v=0) states, respectively. The trend in μ e for the 3d-metal monohydrides is discussed.

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