The recent capability to perform angle-resolved photoemission spectroscopy
(ARPES) with improved energy and angle resolution over a wide photon energy
range has provided new information about f-electron systems. Results for t
wo rather different systems, 5f-electron heavy fermion metal URu2Si2 and 4f
-electron mixed-valent SmBn, are compared and contrasted (C) 2000 Elsevier
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