A molecular beam optical/Stark study of calcium monomethyl

A. J. Marr, F. Grieman, Timothy Steimle

Research output: Contribution to journalArticle

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Abstract

Optical and optical Stark spectra of the 00 0 Ã2E-X̃2A1 band system of a supersonic molecular beam sample of calcium monomethyl, CaCH3, have been recorded. Field free spectroscopic parameters were obtained on fitting the (|KR′| = 1, |K′|=0 and 2)-(|KR″| = 1) and the (|KR′| = 0, |K′|=1)-(|KRPrime;| = 0) subbands. The branch features were reassigned and a resulting new set of spectroscopic parameters determined. The value of the a-principal axis component of the spin-rotation parameter, εaa2E), is now consistent with the assumed nature of the low-lying excited electronic states, Dipole moments of 2.62±0.03 D and 1.69±0.02 D were determined for the X̃2A1 and Ã2E states, respectively. A simple electrostatic model was adapted to predict dipole moments for CaCH3 and MgCH3.

Original languageEnglish (US)
Pages (from-to)3930-3937
Number of pages8
JournalJournal of Chemical Physics
Volume105
Issue number10
StatePublished - 1996

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Molecular beams
Dipole moment
molecular beams
calcium
Calcium
Electronic states
dipole moments
Electrostatics
electrostatics
electronics

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

A molecular beam optical/Stark study of calcium monomethyl. / Marr, A. J.; Grieman, F.; Steimle, Timothy.

In: Journal of Chemical Physics, Vol. 105, No. 10, 1996, p. 3930-3937.

Research output: Contribution to journalArticle

Marr, A. J. ; Grieman, F. ; Steimle, Timothy. / A molecular beam optical/Stark study of calcium monomethyl. In: Journal of Chemical Physics. 1996 ; Vol. 105, No. 10. pp. 3930-3937.
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abstract = "Optical and optical Stark spectra of the 00 0 {\~A}2E-X̃2A1 band system of a supersonic molecular beam sample of calcium monomethyl, CaCH3, have been recorded. Field free spectroscopic parameters were obtained on fitting the (|KR′| = 1, |K′|=0 and 2)-(|KR″| = 1) and the (|KR′| = 0, |K′|=1)-(|KRPrime;| = 0) subbands. The branch features were reassigned and a resulting new set of spectroscopic parameters determined. The value of the a-principal axis component of the spin-rotation parameter, εaa({\~A}2E), is now consistent with the assumed nature of the low-lying excited electronic states, Dipole moments of 2.62±0.03 D and 1.69±0.02 D were determined for the X̃2A1 and {\~A}2E states, respectively. A simple electrostatic model was adapted to predict dipole moments for CaCH3 and MgCH3.",
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AB - Optical and optical Stark spectra of the 00 0 Ã2E-X̃2A1 band system of a supersonic molecular beam sample of calcium monomethyl, CaCH3, have been recorded. Field free spectroscopic parameters were obtained on fitting the (|KR′| = 1, |K′|=0 and 2)-(|KR″| = 1) and the (|KR′| = 0, |K′|=1)-(|KRPrime;| = 0) subbands. The branch features were reassigned and a resulting new set of spectroscopic parameters determined. The value of the a-principal axis component of the spin-rotation parameter, εaa(Ã2E), is now consistent with the assumed nature of the low-lying excited electronic states, Dipole moments of 2.62±0.03 D and 1.69±0.02 D were determined for the X̃2A1 and Ã2E states, respectively. A simple electrostatic model was adapted to predict dipole moments for CaCH3 and MgCH3.

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