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.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry