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Atomic cross-section effects in soft-x-ray photoemission from Ag valence bands

Journal Article · · Phys. Rev., B; (United States)
; ; ; ; ;

The relative photoemission intensity from the Ag 4d valence band (VB) was studied as a function of photon energy using 32--250 eV synchrotron radiation. A sharp decrease in intensity of more than an order of magnitude was observed in the range 100 < h ..omega.. < 140 eV. At h ..omega.. = 140 eV the 4d cross section exhibits a minimum which is attributed to the radial node in the 4d wave function. High-resolution VB spectra were obtained in the energy range 60 < or = h ..omega.. < or = 150 eV. For 110 < or = h ..omega.. < or =130 eV the relative heights of the two prominent valence-band peaks are inverted. This modulation is attributed to the strong variation of the atomic Ag 4d photoelectric cross section in this energy range. These results demonstrate the importance of carrying photoemission studies of 4d-group metals to the h ..omega.. > or = 150 eV range in order to bridge the ultraviolet-photomission to x-ray-photoemission gap. (AIP)

Research Organization:
Materials and Molecular Research Division, Lawrence Berkeley Laboratory and Department of Chemistry, University of California, Berkeley, California 94720
OSTI ID:
7356340
Journal Information:
Phys. Rev., B; (United States), Journal Name: Phys. Rev., B; (United States) Vol. 14:6; ISSN PLRBA
Country of Publication:
United States
Language:
English

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Related Subjects

640302* -- Atomic
Molecular &amp; Chemical Physics-- Atomic &amp; Molecular Properties &amp; Theory
74 ATOMIC AND MOLECULAR PHYSICS
CROSS SECTIONS
ELECTROMAGNETIC RADIATION
ELECTRONS
ELEMENTARY PARTICLES
ELEMENTS
EMISSION
ENERGY RANGE
EV RANGE
EV RANGE 10-100
EV RANGE 100-1000
FERMIONS
IONIZING RADIATIONS
LEPTONS
METALS
PHOTOEMISSION
RADIATIONS
SECONDARY EMISSION
SILVER
SOFT X RADIATION
TRANSITION ELEMENTS
VALENCE
X RADIATION