In a "high-resolution" nuclear quadrupole experiment designed to detect nuclear hexadecapole interactions in solids, a series of ${}_{}{}^{185}{}_{}{}^{}\mathrm{Re}$/${}_{}{}^{187}{}_{}{}^{}\mathrm{Re}$ quadrupole moment ratios were also determined. The compounds included N${\mathrm{H}}_4$Re${\mathrm{O}}_4$, N${\mathrm{D}}_4$Re${\mathrm{O}}_4$, and KRe${\mathrm{O}}_4$ at a variety of temperatures. The weighted mean of our result is $\frac{Q\left(185\right)\mathrm{}}{Q\left(187\right)\mathrm{}}=1.056709\mathrm{}\left(17\right)\mathrm{}$ where the error indicated is the standard error.

Quadrupole moment ratio ${}_{}{}^{185}{}_{}{}^{}\mathrm{Re}$, ${}_{}{}^{187}{}_{}{}^{}\mathrm{Re}$.

• Received 7 April 1978

DOI:https://doi.org/10.1103/PhysRevC.18.2430