1. A coupon of very pure Gold and highly clean surface is exposed to an Argon...

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Chemistry

1. A coupon of very pure Gold and highly clean surface isexposed to an Argon Fluoride (ArF) excimer laser beam of wavelength193.4Â±0.2 nm inside an ESCA (Electron Spectroscopy for ChemicalAnalysis) ultrahigh vacuum spectrometer. The coupon surface facesthe entrance aperture of a hemispherical electrostatic energyanalyzer and detector. The coupon and the analyzer entranceaperture are electrically connected together at ground potential(zero Volts). A fraction of the photo-emitted electrons enters theanalyzer and their energy distribution is measured. a) (2 points)What is the energy of a photon in the ArF laser beam expressed inelectron-Volts (eV)? b) (2 points) The highest energy of thedetected electrons was 1.3Â±0.1 eV. What was the Work Function ofthis Gold surface in eV?

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a What is the energy of a photon in the ArF laser beam expressed in electronVolts eV E h hc h 6625 x 1034 Js c 3x108 ms1 1934 nm 1934 x 109 m E h hc E 6625 See Answer

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