TY - JOUR

T1 - Consideration of the threshold of secondary electrons in photoelectron yield spectroscopy (PYS)

AU - Yagyu, Shinjiro

AU - Yoshitake, Michiko

AU - Kim, Taeyoungand

AU - Chikyow, Toyohiro

N1 - Copyright:
Copyright 2010 Elsevier B.V., All rights reserved.

PY - 2010

Y1 - 2010

N2 - The threshold of secondary electrons in photoelectron yield spectroscopy (PYS) was examined using numerical calculations based on Fowler's formula, and was measured on a Cu(111) surface as a function of the surface temperature. In the numerical calculations, the yields are affected by surface temperature at around the threshold. The yield to the power of 1/2 shows a linear relationship of over 0.04 eV per 100 K from the threshold as a function of energy. The estimated threshold shifts to a lower energy with increasing surface temperature, by 0.003 eV per 100 K. The estimated thresholds also decrease with increasing value of the multiplier of n in Fowler's formula. In experiments, the threshold of Cu(111) at room temperature is estimated to be 4.8 eV ± 0.05 eV. The amount of change in the threshold caused by variation in surface temperature is interpreted in terms of the effects of the intrinsic Fowler's formula and lattice expansion.

AB - The threshold of secondary electrons in photoelectron yield spectroscopy (PYS) was examined using numerical calculations based on Fowler's formula, and was measured on a Cu(111) surface as a function of the surface temperature. In the numerical calculations, the yields are affected by surface temperature at around the threshold. The yield to the power of 1/2 shows a linear relationship of over 0.04 eV per 100 K from the threshold as a function of energy. The estimated threshold shifts to a lower energy with increasing surface temperature, by 0.003 eV per 100 K. The estimated thresholds also decrease with increasing value of the multiplier of n in Fowler's formula. In experiments, the threshold of Cu(111) at room temperature is estimated to be 4.8 eV ± 0.05 eV. The amount of change in the threshold caused by variation in surface temperature is interpreted in terms of the effects of the intrinsic Fowler's formula and lattice expansion.

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U2 - 10.3131/jvsj2.53.187

DO - 10.3131/jvsj2.53.187

M3 - Article

AN - SCOPUS:77953574947

VL - 53

SP - 187

EP - 190

JO - Shinku/Journal of the Vacuum Society of Japan

JF - Shinku/Journal of the Vacuum Society of Japan

SN - 1882-2398

IS - 3

ER -