Ratio of the Electric Quadrupole Moments ofBa137andBa135Nuclei

The Zeeman-split quadrupolar resonances of ${\mathrm{Ba}}^{137}$ and ${\mathrm{Ba}}^{135}$ in barium bromide dihydrate were observed by using coincident enhancement of proton magnetic resonance as a detector. It was found that $\frac{Q_{137}}{Q_{135}}$ is 1.543±0.003 and that the asymmetry parameter of the electric field gradient about the Ba site is 0.726±0.006.