Laser Magnetic Resonance of the NO Molecule Using 78-, 79-, and 119-μmH2O Laser Lines

Abstract

The magnetic resonance of the NO molecule is observed using the 78-, 79-, and 119-μm lines of the ${\mathrm{H}}_2$O laser as the radiation source. The resonances in three cases are due to the $({}_{}{}^2{}_{}{}^{}\Pi _{\frac{1}{2}}^{}{}_{}{}^{}J=12.5)\to ({}_{}{}^2{}_{}{}^{}\Pi _{\frac{3}{2}}^{}{}_{}{}^{}J=12.5)$, $({}_{}{}^2{}_{}{}^{}\Pi _{\frac{1}{2}}^{}{}_{}{}^{}J=11.5)\to ({}_{}{}^2{}_{}{}^{}\Pi _{\frac{3}{2}}^{}{}_{}{}^{}J=11.5)$, and $({}_{}{}^2{}_{}{}^{}\Pi _{\frac{1}{2}}^{}{}_{}{}^{}J=12.5)\to ({}_{}{}^2{}_{}{}^{}\Pi _{\frac{3}{2}}^{}{}_{}{}^{}J=11.5)$ transitions, respectively. Most of them are magnetic dipole transitions, but a few electric dipole transitions are also observed. It is found that the calculated $g$ factors $g_{c2\mathrm{}}=\left(11.5\right)=g_{d2\mathrm{}}\mathrm{}\left(11.5\right)=-0.0064\mathrm{}$, $g_{c1\mathrm{}}\mathrm{}\left(11.5\right)=g_{d1\mathrm{}}\mathrm{}\left(11.5\right)=0.0272\mathrm{}$, $g_{c2\mathrm{}}\mathrm{}\left(12.5\right)=g_{d2\mathrm{}}\mathrm{}\left(12.5\right)=-0.0092\mathrm{}$, $g_{c1\mathrm{}}\mathrm{}\left(12.5\right)=g_{d1\mathrm{}}\mathrm{}\left(12.5\right)=0.0270\mathrm{}$, and the calculated $\Lambda$-doublet separations $f_{c2\mathrm{}}\mathrm{}\left(11.5\right)-f_{d2\mathrm{}}\mathrm{}\left(12.5\right)=243\mathrm{}$ MHz, $f_{c1\mathrm{}}\mathrm{}\left(11.5\right)-f_{d1\mathrm{}}\mathrm{}\left(11.5\right)=4323\mathrm{}$ MHz, are consistent with our experimental results. The hyperfine structure and the second-order effects are also in agreement with theoretical values. The average separation between the ${}_{}{}^2{}_{}{}^{}\Pi _{\frac{3}{2}}^{}{}_{}{}^{}$ and

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