Nuclear orientation and nuclear magnetic resonance measurements have been performed for ${}_{}{}^{196}{}_{}{}^{}\mathrm{Au}$ oriented at 6 and 12 mK in an iron host. The magnetic hyperfine-splitting frequency ‖g${\mu }_{\mathrm{N}{B}_{\mathrm{HF}/\mathrm{h}\mathrm{\Vert }}}$ and the quadrupole splitting frequency $e^2$qQ/h were determined to be 258.26(10) and -2.22(15) MHz, respectively. With the known hyperfine field of -1147.3(8) kG and electric field gradient of (-)0.113(6)×${10}^{17}$ V/${\mathrm{cm}}^2$, the magnetic moment and the spectroscopic quadrupole moment were deduced to be μ=0.5906(5) ${\mu }_{\mathrm{N}}$ and Q=0.81(7) b, respectively. From angular distributions of γ rays, the deorientation parameters of $U_2$ and $U_4$ for the $2^{\mathrm{-}}$→$2^{+}$ first-forbidden transitions from ${}_{}{}^{196}{}_{}{}^{}\mathrm{Au}$ to ${}_{}{}^{196}{}_{}{}^{}\mathrm{Pt}$ and ${}_{}{}^{196}{}_{}{}^{}\mathrm{Hg}$ have been deduced.

• Received 6 July 1987

DOI:https://doi.org/10.1103/PhysRevC.36.2072