Molecular beam measurement of the magnetic susceptibility anisotropies and molecular quadrupole moment in H2CO

Stephen G. Kukolich

doi:10.1063/1.1674644

Molecular beam measurement of the magnetic susceptibility anisotropies and molecular quadrupole moment in H₂CO

Stephen G. Kukolich

Chemistry and Biochemistry

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Abstract

The molecular Zeeman effect in formaldehyde was studied using a molecular beam maser spectrometer in fields to 17 kG. The molecular resonance linewidth was 5 kHz. ΔM = 0 and Δlf=±1 transitions were observed for the 1₁₀→1₁₁ rotational transition. The measured susceptibility anisotropies (in units of 10^-6 erg/G ²·mole) are 2χ_aaχ_bb- χ_cc = 25.4±0.2 and 2χ_bb-χ_aa- χ_cc= -4.1±0.15. The molecular quadrupole moment obtained from thisdata (in units of 10^-25 esu·cm²) are Q_aa= -0.06±0.16, Q_bb=0.33±0.12, and Q _cc = - 0.27±0.20. The Stark effect produced by the motion of the molecules in the magnetic field (v̄×B̄) was clearly observed.

Original language	English (US)
Pages (from-to)	105-110
Number of pages	6
Journal	The Journal of chemical physics
Volume	54
Issue number	1
DOIs	https://doi.org/10.1063/1.1674644
State	Published - 1971

ASJC Scopus subject areas

Physics and Astronomy(all)
Physical and Theoretical Chemistry

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title = "Molecular beam measurement of the magnetic susceptibility anisotropies and molecular quadrupole moment in H2CO",

abstract = "The molecular Zeeman effect in formaldehyde was studied using a molecular beam maser spectrometer in fields to 17 kG. The molecular resonance linewidth was 5 kHz. ΔM = 0 and Δlf=±1 transitions were observed for the 110→111 rotational transition. The measured susceptibility anisotropies (in units of 10-6 erg/G 2·mole) are 2χaaχbb- χcc = 25.4±0.2 and 2χbb-χaa- χcc= -4.1±0.15. The molecular quadrupole moment obtained from thisdata (in units of 10-25 esu·cm2) are Qaa= -0.06±0.16, Qbb=0.33±0.12, and Q cc = - 0.27±0.20. The Stark effect produced by the motion of the molecules in the magnetic field ({\=v}×{\=B}) was clearly observed.",

author = "Kukolich, {Stephen G.}",

year = "1971",

doi = "10.1063/1.1674644",

language = "English (US)",

volume = "54",

pages = "105--110",

journal = "Journal of Chemical Physics",

issn = "0021-9606",

publisher = "American Institute of Physics Publising LLC",

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T1 - Molecular beam measurement of the magnetic susceptibility anisotropies and molecular quadrupole moment in H2CO

AU - Kukolich, Stephen G.

PY - 1971

Y1 - 1971

N2 - The molecular Zeeman effect in formaldehyde was studied using a molecular beam maser spectrometer in fields to 17 kG. The molecular resonance linewidth was 5 kHz. ΔM = 0 and Δlf=±1 transitions were observed for the 110→111 rotational transition. The measured susceptibility anisotropies (in units of 10-6 erg/G 2·mole) are 2χaaχbb- χcc = 25.4±0.2 and 2χbb-χaa- χcc= -4.1±0.15. The molecular quadrupole moment obtained from thisdata (in units of 10-25 esu·cm2) are Qaa= -0.06±0.16, Qbb=0.33±0.12, and Q cc = - 0.27±0.20. The Stark effect produced by the motion of the molecules in the magnetic field (v̄×B̄) was clearly observed.

AB - The molecular Zeeman effect in formaldehyde was studied using a molecular beam maser spectrometer in fields to 17 kG. The molecular resonance linewidth was 5 kHz. ΔM = 0 and Δlf=±1 transitions were observed for the 110→111 rotational transition. The measured susceptibility anisotropies (in units of 10-6 erg/G 2·mole) are 2χaaχbb- χcc = 25.4±0.2 and 2χbb-χaa- χcc= -4.1±0.15. The molecular quadrupole moment obtained from thisdata (in units of 10-25 esu·cm2) are Qaa= -0.06±0.16, Qbb=0.33±0.12, and Q cc = - 0.27±0.20. The Stark effect produced by the motion of the molecules in the magnetic field (v̄×B̄) was clearly observed.

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JF - Journal of Chemical Physics

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Molecular beam measurement of the magnetic susceptibility anisotropies and molecular quadrupole moment in H₂CO

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