Abstract

We investigate the case of the Xe 5s angular distribution in the region of the second Cooper minimum covering a photon energy region from 80 to 280 eV. We observe a strong drop in the Xe 5s β value from 2.0, reaching a minimum of 1.669(8) at a photon energy of 150 eV. Our results are in good accord with a previously published measurement on the low-energy side of this minimum, but show a much slower return to β = 2.0 on the high-energy side of the minimum. We also compare our results to several different theoretical calculations and find excellent agreement with a relativistic time-dependent density functional theory calculation.

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