Microwave Spectrum ofN14O16

The $J=\frac{1}{2}\to \frac{3}{2}$ ($v=0\mathrm{}$) rotational transition of the ${}_{}{}^2{}_{}{}^{}\pi _{\frac{1}{2}}^{}{}_{}{}^{}$ state of ${\mathrm{N}}^{14}$ ${\mathrm{O}}^{16}$ has been measured. This transition occurs at 150 372.30 Mc/sec and is split into two groups of five lines due to $\Lambda$-type doubling and a large magnetic hyperfine interaction. The value of $B_0$ is found to be 1.69510 ${\mathrm{cm}}^{-1\mathrm{}}$ and $r_0=1.1539\mathrm{}\mathrm{A}$. The $\Lambda$-doubling constant $p$ is determined as 355.2 Mc/sec, and a spin of 1 is again confirmed for ${\mathrm{N}}^{14}$. A preliminary analysis of the magnetic hyperfine structure is given, based on the interaction Hamiltonian $a{I}_{z^{\prime }}{L}_{z^{\prime }}+b\mathrm{I}·\mathrm{S}+c{I}_{z^{\prime }}{S}_{z^{\prime }}$, where $a$, $b$, and $c$ are constants.