Energy Quanta Emitted in Disintegration of Ground State ofBa133

Abstract

The ground state of radioactive ${\mathrm{Ba}}^{133}$ was correlated with metastable state of ${\mathrm{Ba}}^{133*}$. It was found that after $K$-electron capture occurs, there are two excited states in ${\mathrm{Cs}}^{133*}$ corresponding to observed two photons of 320±10 kev and 85±5 kev. Both gamma-rays are converted. The conversion ratios for these two photons are $\frac{N_e}{N_{\gamma }}\approx 0.02 \mathrm{and} 0.34$, respectively. The change in angular momenta of the excited states of ${\mathrm{Cs}}^{133*}$ due to emission of 320-kev and 85-kev photons is calculated to be $L=2\mathrm{}$ and $L=1\mathrm{}$. Attempts to observe a third gamma-ray of Å405 kev did not yield positive results. The calculated intensity of the 405-kev photon, if it is emitted, is estimated as equal to 0.001 of the intensity of the 320-kev photon.