CO2 and CO laser microwave double resonance spectroscopy of OCS: Precise measurement of dipole moment and polarizability anisotropy

Keiichi Tanaka, Hajime Ito, Kensuke Harada, Takehiko Tanaka

Research output: Contribution to journalArticle

79 Citations (Scopus)

Abstract

Laser-microwave double resonance (LMDR) with high electric field was applied to the OCS molecule. Stark Lamb-dip spectra due to the infrared transitions of the 2ν2(0200-0000, 9.6 μm), 2ν1(2000-0000, 5.8μm), and ν1+2ν2(1200-0000, 5.3μm) bands were observed with the CO2 and CO lasers. The spectra due to the corresponding hot bands; 0310-0110, 04 00-0200, 1200-1000, 13 10-1110; 2110-0110, 30 00-1000; 1400-0200, 14 20-0220, 1510-0310, 22 00-1000; and a few bands of OC34S and O 13CS were also identified. Associated with these infrared transitions, more than 90 LMDR signals were detected and assigned to rotational transitions in the 11 vibrational states 0000, 1000, 2000, 0110, 0200, 0220, 03 10, 0400, 1200, 1420, and 22 00 of the normal species, and in the two vibrational states 00 00 and 0200 of both OC34S and O13CS. Dipole moments were determined with accuracies (2.5σ) better than 2×10-5 D for all these vibrational states. Polarizability anisotropies were also obtained for some states. The data for the ground ν1 and ν2 vibrational states are, with the 2.5σ uncertainties in parentheses. Ground ν1 ν2 μ 0.715 196(10) 0.694 413(5) 0.704 330(11) D δμ ... -0.020 783(11) -0.010 866(15) D α 4.67(11) 4.84(14) 4.85(30) Å3 From the Stark Lamb-dip spectra the origins of various vibrational bands were determined, among which those for the 0200-0000 and 0310-0110 bands are 31 389 530.4(25) and 31 566 477.57(67) MHz, respectively. The dipole moments and band origins obtained in the present study agree well with the available accurate values from molecular beam electric resonance and heterodyne measurement, respectively. A procedure for the calibration of electric field in laser Stark and double resonance spectroscopy, in which the dipole moment of OCS is used as the standard, is described.

Original languageEnglish
Pages (from-to)5893-5905
Number of pages13
JournalThe Journal of Chemical Physics
Volume80
Issue number12
Publication statusPublished - Dec 1 1983

Fingerprint

Dipole moment
Carbon Monoxide
dipole moments
Anisotropy
Microwaves
Spectroscopy
microwaves
vibrational states
anisotropy
Lasers
spectroscopy
lasers
Electric fields
Infrared radiation
Molecular beams
electric fields
Calibration
molecular beams
Molecules
molecules

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

CO2 and CO laser microwave double resonance spectroscopy of OCS : Precise measurement of dipole moment and polarizability anisotropy. / Tanaka, Keiichi; Ito, Hajime; Harada, Kensuke; Tanaka, Takehiko.

In: The Journal of Chemical Physics, Vol. 80, No. 12, 01.12.1983, p. 5893-5905.

Research output: Contribution to journalArticle

@article{973dba907e3848188038d2399c6bbb32,
title = "CO2 and CO laser microwave double resonance spectroscopy of OCS: Precise measurement of dipole moment and polarizability anisotropy",
abstract = "Laser-microwave double resonance (LMDR) with high electric field was applied to the OCS molecule. Stark Lamb-dip spectra due to the infrared transitions of the 2ν2(0200-0000, 9.6 μm), 2ν1(2000-0000, 5.8μm), and ν1+2ν2(1200-0000, 5.3μm) bands were observed with the CO2 and CO lasers. The spectra due to the corresponding hot bands; 0310-0110, 04 00-0200, 1200-1000, 13 10-1110; 2110-0110, 30 00-1000; 1400-0200, 14 20-0220, 1510-0310, 22 00-1000; and a few bands of OC34S and O 13CS were also identified. Associated with these infrared transitions, more than 90 LMDR signals were detected and assigned to rotational transitions in the 11 vibrational states 0000, 1000, 2000, 0110, 0200, 0220, 03 10, 0400, 1200, 1420, and 22 00 of the normal species, and in the two vibrational states 00 00 and 0200 of both OC34S and O13CS. Dipole moments were determined with accuracies (2.5σ) better than 2×10-5 D for all these vibrational states. Polarizability anisotropies were also obtained for some states. The data for the ground ν1 and ν2 vibrational states are, with the 2.5σ uncertainties in parentheses. Ground ν1 ν2 μ 0.715 196(10) 0.694 413(5) 0.704 330(11) D δμ ... -0.020 783(11) -0.010 866(15) D α 4.67(11) 4.84(14) 4.85(30) {\AA}3 From the Stark Lamb-dip spectra the origins of various vibrational bands were determined, among which those for the 0200-0000 and 0310-0110 bands are 31 389 530.4(25) and 31 566 477.57(67) MHz, respectively. The dipole moments and band origins obtained in the present study agree well with the available accurate values from molecular beam electric resonance and heterodyne measurement, respectively. A procedure for the calibration of electric field in laser Stark and double resonance spectroscopy, in which the dipole moment of OCS is used as the standard, is described.",
author = "Keiichi Tanaka and Hajime Ito and Kensuke Harada and Takehiko Tanaka",
year = "1983",
month = "12",
day = "1",
language = "English",
volume = "80",
pages = "5893--5905",
journal = "Journal of Chemical Physics",
issn = "0021-9606",
publisher = "American Institute of Physics Publising LLC",
number = "12",

}

TY - JOUR

T1 - CO2 and CO laser microwave double resonance spectroscopy of OCS

T2 - Precise measurement of dipole moment and polarizability anisotropy

AU - Tanaka, Keiichi

AU - Ito, Hajime

AU - Harada, Kensuke

AU - Tanaka, Takehiko

PY - 1983/12/1

Y1 - 1983/12/1

N2 - Laser-microwave double resonance (LMDR) with high electric field was applied to the OCS molecule. Stark Lamb-dip spectra due to the infrared transitions of the 2ν2(0200-0000, 9.6 μm), 2ν1(2000-0000, 5.8μm), and ν1+2ν2(1200-0000, 5.3μm) bands were observed with the CO2 and CO lasers. The spectra due to the corresponding hot bands; 0310-0110, 04 00-0200, 1200-1000, 13 10-1110; 2110-0110, 30 00-1000; 1400-0200, 14 20-0220, 1510-0310, 22 00-1000; and a few bands of OC34S and O 13CS were also identified. Associated with these infrared transitions, more than 90 LMDR signals were detected and assigned to rotational transitions in the 11 vibrational states 0000, 1000, 2000, 0110, 0200, 0220, 03 10, 0400, 1200, 1420, and 22 00 of the normal species, and in the two vibrational states 00 00 and 0200 of both OC34S and O13CS. Dipole moments were determined with accuracies (2.5σ) better than 2×10-5 D for all these vibrational states. Polarizability anisotropies were also obtained for some states. The data for the ground ν1 and ν2 vibrational states are, with the 2.5σ uncertainties in parentheses. Ground ν1 ν2 μ 0.715 196(10) 0.694 413(5) 0.704 330(11) D δμ ... -0.020 783(11) -0.010 866(15) D α 4.67(11) 4.84(14) 4.85(30) Å3 From the Stark Lamb-dip spectra the origins of various vibrational bands were determined, among which those for the 0200-0000 and 0310-0110 bands are 31 389 530.4(25) and 31 566 477.57(67) MHz, respectively. The dipole moments and band origins obtained in the present study agree well with the available accurate values from molecular beam electric resonance and heterodyne measurement, respectively. A procedure for the calibration of electric field in laser Stark and double resonance spectroscopy, in which the dipole moment of OCS is used as the standard, is described.

AB - Laser-microwave double resonance (LMDR) with high electric field was applied to the OCS molecule. Stark Lamb-dip spectra due to the infrared transitions of the 2ν2(0200-0000, 9.6 μm), 2ν1(2000-0000, 5.8μm), and ν1+2ν2(1200-0000, 5.3μm) bands were observed with the CO2 and CO lasers. The spectra due to the corresponding hot bands; 0310-0110, 04 00-0200, 1200-1000, 13 10-1110; 2110-0110, 30 00-1000; 1400-0200, 14 20-0220, 1510-0310, 22 00-1000; and a few bands of OC34S and O 13CS were also identified. Associated with these infrared transitions, more than 90 LMDR signals were detected and assigned to rotational transitions in the 11 vibrational states 0000, 1000, 2000, 0110, 0200, 0220, 03 10, 0400, 1200, 1420, and 22 00 of the normal species, and in the two vibrational states 00 00 and 0200 of both OC34S and O13CS. Dipole moments were determined with accuracies (2.5σ) better than 2×10-5 D for all these vibrational states. Polarizability anisotropies were also obtained for some states. The data for the ground ν1 and ν2 vibrational states are, with the 2.5σ uncertainties in parentheses. Ground ν1 ν2 μ 0.715 196(10) 0.694 413(5) 0.704 330(11) D δμ ... -0.020 783(11) -0.010 866(15) D α 4.67(11) 4.84(14) 4.85(30) Å3 From the Stark Lamb-dip spectra the origins of various vibrational bands were determined, among which those for the 0200-0000 and 0310-0110 bands are 31 389 530.4(25) and 31 566 477.57(67) MHz, respectively. The dipole moments and band origins obtained in the present study agree well with the available accurate values from molecular beam electric resonance and heterodyne measurement, respectively. A procedure for the calibration of electric field in laser Stark and double resonance spectroscopy, in which the dipole moment of OCS is used as the standard, is described.

UR - http://www.scopus.com/inward/record.url?scp=36549091550&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=36549091550&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:36549091550

VL - 80

SP - 5893

EP - 5905

JO - Journal of Chemical Physics

JF - Journal of Chemical Physics

SN - 0021-9606

IS - 12

ER -