Font size
WorksheetsXPS
Total questions: 10
Worksheet time: 10mins
XPS (otherwise ESCA) is based on the -----------
Quantum effect
Tunneling effect
Photoelectric effect
Resonance effect
XPS can be used to determine ------------------ (Select all that apply).
thicknesses
binding energies
chemical composition
oxidation state
XPS can produce electrons with discrete energies through -------
photoionization
electron ionization
photoionization and Auger process
radiation process
Elements present in sample can be identified on the basis of --------------of their photoelectrons
kinetic energy
binding energy
kinetic energy & binding energy
auger electron only
When an X-ray ejects out an electron, the ejected electron is called photoelectron and this effect is called -----------------.
Tunneling effect
Electronic effect
Coulomb Blockade effect
photoelectric effect
In XPS, the kinetic energy of the ejected photoelectron is essentially the difference between the energy of the -------------- and the ----------- of the electron.
incident photon & binding energy
incident electron & binding energy
incident electron & kinetic energy
incident electron & x-ray energy
The X-ray source used in XPS is ---------
Cu Kα: hv = 1486.6 eV
Al Kα: hv = 1486.6 eV
Na Kα: hv = 1486.6 eV
Au Kα: hv = 1486.6 eV
------------- of photoelectron provide information about atomic composition, concentration of element & oxidation state of the sample.
Intensity
width
wavelength
atomic number
XPS can be used for elements atomic number ----------because of smaller orbital’s radius.
less than 1
greater than 1
>= 1
greater than 3
The energetic X-ray hits the sample (or atom) and ejects -------- the photoelectron.
K
L
M
N
