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Dive into the research topics where R.F. Davis is active.

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Featured researches published by R.F. Davis.


Chemical Physics Letters | 1980

Condensed phase photoelectron asymmetry

R.F. Davis; S. D. Kevan; B. C. Lu; J.G. Tobin; D. A. Shirley

Large directional asymmetries were observed in photoelectron distributions from core and valence levels in metals and adsorbate atoms. Intensities varied by factors up to 25 as the angle between A and p was varied. The energy dependence of asymmetry showed atomic behavior similar to that expected for free atoms, modified for the tendency p∥A.


Chemical Physics Letters | 1978

Adsorbate sensitivity enhancement in photoemission: CO on Pd

P.S. Wehner; S. D. Kevan; R.S. Williams; R.F. Davis; D. A. Shirley

Abstract Photoelectron spectra for CO on a Pd substrate have been measured in the photon energy range 40–180 eV. A dramatic resonance in the intensity ratio of the CO-derived peaks compared to the Pd valence band (VB) was found for photon energies near 130 eV, where the ratio is ca. nine times larger than at hv = 40 eV. This increased spectral sensitivity to the CO molecular orbitals results from a Cooper minimum in the photoemission cross section of the Pd 4d valence level. Because such spectral minima are present in all 4d and 5d VB materials, adsorbate studies on these substrates at photon energies near 130 eV (for which laboratory sources are potentially available) should benefit greatly from the decreased background and the increased surface sensitivity. This point is further illustrated by comparing the present results to previously reported photoemission data from CO on Ni and Pt substrates.


Physical Review Letters | 1981

STRUCTURAL DETERMINATION OF MOLECULAR OVERLAYER SYSTEMS WITH NORMAL PHOTOELECTRON DIFFRACTION: c(2x2)CO-Ni(001) AND (/3 x /3)R30| Co-Ni(111)

S. D. Kevan; R.F. Davis; D.H. Rosenblatt; J. G. Tobin; M.G. Mason; D. A. Shirley; C.H. Li; S. Y. Tong


Physical Review B | 1980

Angle-resolved photoemission determination of. lambda. -line valence bands in Pt and Au using synchrotron radiation

K.A. Mills; R.F. Davis; S. D. Kevan; G. Thornton; D. A. Shirley


Physical Review B | 1982

Normal photoelectron diffraction studies of selenium and sulfur overlayers on Ni(011) and Ni(111)

D.H. Rosenblatt; S. D. Kevan; J. G. Tobin; R.F. Davis; M.G. Mason; D.R. Denley; D. A. Shirley; Y. Huang; S. Y. Tong


Physical Review Letters | 1978

Identification of Chemisorption Levels on Iridium by Field-Emission Spectroscopy

R.S. Williams; P.S. Wehner; S. D. Kevan; R.F. Davis; D. A. Shirley


Physical Review B | 1982

Off-normal photoelectron diffraction study of the c(2 x 2) selenium overlayer on Ni(001)

D.H. Rosenblatt; S. D. Kevan; J. G. Tobin; R.F. Davis; M.G. Mason; D. A. Shirley; J.C. Tang; S. Y. Tong


Physical Review B | 1985

Angle-resolved photoemission studies of the valence-band structure of stepped crystal surfaces: Cu(S)-[3(111) × (100)]

R.F. Davis; R.S. Williams; S. D. Kevan; P.S. Wehner; D. A. Shirley


Physical Review B | 1981

Temperature dependence of normal-emission photoelectron diffraction and analogies with extended x-ray-absorption fine structure

S. D. Kevan; J. G. Tobin; D.H. Rosenblatt; R.F. Davis; D. A. Shirley


Physical Review Letters | 1980

Substrate-dependent C(1s) shape resonance in CO overlayers on Ni(111) and Ni(001)

R.F. Davis; S. D. Kevan; D.H. Rosenblatt; M.G. Mason; J. G. Tobin; D. A. Shirley

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D. A. Shirley

University of California

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J. G. Tobin

Lawrence Livermore National Laboratory

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P.S. Wehner

University of California

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R.S. Williams

University of California

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S. Y. Tong

City University of Hong Kong

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M.G. Mason

Lawrence Berkeley National Laboratory

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B. C. Lu

University of California

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J.G. Tobin

University of California

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