The structures above the Kr K edge are reported and for the first time interpreted as due to multielectron transitions involving K, M, and N electrons. The cross section of the 1s3d multielectron transition is analyzed and an onset more rapid than the one expected according to the ``shake'' model is observed. This behavior is quite well described by a model proposed by St\"ohr, Jaeger, and Rehr [Phys. Rev. Lett. 51, 821 (1983)] based on the exchange interaction.
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Bernieri et al. (1987) studied this question.
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