Radiative X-Ray Transitions Within theLShell

Whereas $N-N$ and $M-M$ lines have been observed in the x-ray spectra of several elements, $L-L$ lines have not been identified. However, isolated lines of sodium (375A), magnesium (317A) and aluminum (290A) reported by Skinner are here designated as $L_I-L_{II,III}$. Thus the $L_I$ term in these elements may now be evaluated, and reliable predictions of $L_I$ may be made for the elements silicon to chromium.