Abstract
Using a 40-cm curved muscovite mica spectrograph of the transmission (Cauchois) type, three new diagram lines at 1542.03 \ifmmode\pm\else\textpm\fi{} 0.01, 1537.94 \ifmmode\pm\else\textpm\fi{} 0.01, and 1535.80 \ifmmode\pm\else\textpm\fi{} 0.01 xu (${10}^{\ensuremath{-}3}$ \AA{}) have been reported in the $L$-emission spectrum of $_{67}\mathrm{Ho}$. The first line corresponds to the electric dipole transition ${L}_{3}{O}_{1}({\ensuremath{\beta}}_{7})$, and the other two correspond to the electric quadrupole transitions ${L}_{1}{M}_{5}({\ensuremath{\beta}}_{9})$ and ${L}_{3}{O}_{2,3}$, respectively. A new nondiagram line (satellite) $L{\ensuremath{\beta}}_{2}^{\mathrm{II}}$ has been observed at 1551.90 \ifmmode\pm\else\textpm\fi{} 0.01 xu for the first time. On the basis of Wentzel's theory for the origin of high-frequency x-ray satellites, this line has been assigned to the transition ${L}_{3}{M}_{3}\ensuremath{\rightarrow}{M}_{3}{N}_{5}$. Apart from these newly observed lines, the presence of the electric dipole transitions ${L}_{2}{O}_{4}({\ensuremath{\gamma}}_{6})$ and ${L}_{3}{O}_{4}({\ensuremath{\beta}}_{5})$ and that of the nondiagram lines ${\ensuremath{\alpha}}^{x}$, ${\ensuremath{\beta}}_{1}^{\ensuremath{'}}$, ${\ensuremath{\beta}}_{2}^{\mathrm{I}}$, and ${\ensuremath{\gamma}}_{1}^{\ensuremath{'}}$, so far reported only by one worker, has been confirmed for the first time.
Published Version
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