X-Ray Line Absorption in the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>M</mml:mi></mml:math>-Series for 62-Sm

Abstract

The ${M}_{\mathrm{IV}}$ and ${M}_{\mathrm{V}}$ absorption edges for 62-Sm were studied by use of evaporated films of ${\mathrm{Sm}}_{2}$${\mathrm{O}}_{3}$ and Sm${\mathrm{Cl}}_{3}$. In view of data in the literature on $M$-absorption of the rare earths 70-Yb and 68-Er, it seemed possible that absorption lines would be found corresponding to transitions in which electrons from the $M$-shell are lifted to the inner ${N}_{\mathrm{VII}}$ and ${N}_{\mathrm{VI}}$ levels. When thin absorption films were employed, the entire absorption had the appearance of lines, but thick films revealed the definite edge-like character of the absorption. The ${M}_{\mathrm{IV}}$ and ${M}_{\mathrm{V}}$ edges are very similar and are both complex, four edges being distinguished in each case. In both cases the first pair of edges is separated from the latter pair by a minimum, which may correspond to transitions in which the electrons are lifted to the ${N}_{\mathrm{VII}}$ and ${N}_{\mathrm{VI}}$ levels.