Gamma-Gamma Angular Correlation inPd106

The angular correlation of the 624- and 513-kev $\gamma$ rays and that of the 1045- and 513-kev $\gamma$ rays of ${\mathrm{Pd}}^{106}$ have been measured with a coincidence scintillation spectrometer using NaI detectors. For a dilute ruthenium chloride aqueous solution source, the correlation function of the 624-513-kev cascade is $W\left(\theta \right)=1+(0.3456\mathrm{}\pm 0.0079)P_2\left(cos\theta \right)+(1.109\mathrm{}\pm 0.012)P_4\left(cos\theta \right)$; that of the 1045-513-kev cascade is $W\left(\theta \right)=1+(0.0921\mathrm{}\pm 0.0027)P_2\left(cos\theta \right)+(0.0350\mathrm{}\pm 0.0092)P_4\left(cos\theta \right)$. In each of the above functions, the finite angular resolution of the equipment has been taken into account. The measurement on the 1045-513-kev cascade establishes the spin of the 1550-kev level as two and gives the intensity of the electric quadrupole radiation as 4.24±0.14 percent relative to the intensity of the magnetic dipole radiation in the 1045-kev transition.