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Photoemission satellites from several systems have been found to exhibit exactly the same angle-resolved photoemission extended fine structure (ARPEFS) as found in the main peaks, when referred to the equivalent photoelectron wave number k for their own photoelectrons. This provides a direct and powerful method for experimentally determining the angular momentum parameters and the intrinsic/extrinsic nature of core-level photoemission satellites. We present ARPEFS satellite data for nitrogen 1s line in c(2{times}2)N{sub 2}/Ni(100), the nickel 3p line in clean nickel (111), the carbon 1s lines in ({radical}(3){times}{radical}(3))R30 CO/Cu(111) and p2mg(2{times}1)CO/Ni(110), and the cobalt 1s line in p(1{times}1) Co/Cu(100). For the last two cases the {open_quotes}satellite{close_quotes} structure is actually the low-energy tail of a Doniach-Sunjic line shape. The satellite peaks and the tails of the Doniach-Sunjic line shapes exhibit ARPEFS curves that in all cases except one indicate angular-momentum parameters identical to the main peak and an intrinsic nature. {copyright} {ital 1997} {ital The American Physical Society}

Direct evidence for the nature of core-level photoemission satellites using angle-resolved photoemission extended fine structure