1Energy of the Shell is dependent on...
n & l quantum numbers
7De Broglie Relation
Electron Wavelength is inversely proportional to its momentum
8X-Ray Wavelength
~0.05 to 2.5 A
9Light Wavelength
~2500 to 7000 A
10Electron Penetration Depth
~0.001 mm
12Multiplicity vs Degeneracy
Multiplicity accounts for spins
13Binding energy at the Fermi Level =
0
14XPS detector measures...
core hole's electron's kinetic energy
15Source energy in XPS & XES
X-Ray Photons
16XPS source is kept constant? (T/F)
True
17XES detector measures...
X-Rays Photos emitted from the sample
18Source Energy in XAS is...
X-Ray
19XAS Measurements are performed in...
Transmission
20What does an Objective Lens do?
Brings the Image into focus for the eye/detector
21OM magnifies up to...
~2000x
22What's the benefit of EM in Transmission?
Provides Atomic Resolution
23Radiation sample prep techniques:
Grinding, Freeze & Polish, Microtom, Other
24Uranium microscopy:
XPS, XES, XAS
25Polishing needs to be used for all methods except...
Fracture Surface Analysis
26Electropolishing requires samples to be...
Conductive
27How can we examine non-conductors in EM?
Coat them with gold or carbon
28Polymer TEM Samples should use...
Microtomy
29Snell's Law
sina1 / sina2 = v1 / v2 = n1 / n2
30Abbe Equation
y = 0.612 (c / usina)
31Numerical Aperature controls:
Resolution, Brightness, Working Distance
32OM Contrast is...
the intensity difference between neighboring resolved image features
33With OM, we can resolve images up to...
1 micron
34As particle size decreases, the surface area per unit volume will...
increase
35Field Emission Gun uses
Tungsten Single Crystal
36LaB6 =
Lanthanum Hexaboride Single Crystal
37Probe Current =
measured at the specimen