Nuclear Spectroscopy ofBa131

The spectra of ${\mathrm{Ba}}^{131}$ have been investigated in permanent magnet spectrographs, a solenoidal betaspectrometer and a thin lens gamma-spectrometer. Gamma-rays of 122, 214, 241, 370, and 494 kev have been confirmed. In the conversion electron spectrum, there is indication of the existence of three low energy gamma-rays: ∼65 kev, ∼43 kev, and ∼108 kev. The $\frac{K}{L}$ ratios, $K$-conversion coefficients and relative intensities have been estimated.