The directional angular correlation of the 1367-605 kev $\gamma -\gamma$ cascade in ${\mathrm{Ba}}^{134}$ has been measured with a coincidence scintillation spectrometer using NaI detectors. For a dilute cesium chloride aqueous solution source, the observed correlation function, after correcting for the finite angular resolution of the detectors, is given by $W\left(\theta \right)=1+(0.090\mathrm{}\pm 0.0086)P_2\left(cos\theta \right)-(0.004\mathrm{}\pm 0.013)P_4\left(cos\theta \right)$. From this result it is not possible to assign unambiguously a spin and parity to the 1972-kev level in ${\mathrm{Ba}}^{134}$, from which the cascade originates. However, the present angular correlation data taken with internal conversion coefficient data for the transitions from this level indicate that it very probably has spin 3 and odd parity.

Close

PrevNext

View figure in article