Optical Determination of Mean Free Path of Hot Electrons in Metals

1980 ◽  
Vol 102 (1) ◽  
pp. 227-234 ◽  
Author(s):  
N. Kroó ◽  
Zs. Szentirmay ◽  
J. Félszerfalvi
Keyword(s):  
Free Path ◽  
Mean Free Path ◽  
Hot Electrons ◽  
Optical Determination

Determination of Mean Free Path for Inelastic Scattering in Poly(2-Vinyl Pyridine) by Low-Loss Spectrum Imaging

2000 ◽  
Vol 6 (S2) ◽  
pp. 224-225
Author(s):  
A. Aitouchen ◽  
T. Chou ◽  
M. Libera ◽  
M. Misra
Keyword(s):  
Free Path ◽  
Free Fall ◽  
Mean Free Path ◽  
Specimen Thickness ◽  
Thickness Determination ◽  
Vinyl Pyridine ◽  
Integrated Intensity ◽  
Inelastic Mean Free Path ◽  
Electron Energy Loss

The common experimental method to determine the total inelastic mean free path i by electron energy-loss spectroscopy (EELS) is by the relation : t/λi= ln(It/IO) [1] where t is the specimen thickness, It, is the total integrated intensity, and Io is the intensity of the zero-loss peak. The accuracy of this measurement depends on the thickness determination. Model geometries like cubes, wedges, and spheres enable accurate thickness determination from transmission images.Spherical polymers with diameters of order 10-200nm can be made from a number of high-Tg polymers by solvent atomization. This research studied atomized spheres of poly(2-vinyl pyridine) [PVP]. A solution of 0.1% PVP in THF was nebulized. After solvent evaporation during free fall within the chamber atmosphere, solid spherical polymer particles with a range of diameters were collected on holey-carbon TEM grids at the bottom of the atomization chamber.

scholarly journals Determination of Inelastic Mean Free Path of Electrons in Noble Metals

1992 ◽  
Vol 81 (2) ◽  
pp. 193-199 ◽  
Author(s):  
W. Doliński ◽  
S. Mróz ◽  
J. Palczyński ◽  
B. Gruzza ◽  
P. Bondot ◽  
...  
Keyword(s):  
Free Path ◽  
Noble Metals ◽  
Mean Free Path ◽  
Inelastic Mean Free Path

Nuclear Spin Relaxation Investigations on the Influence of Impurities and Temperature on the Mean Free Path of Mobile Dislocations in Nacl

1980 ◽  
Vol 3 ◽  
Author(s):  
W. H. M. Alsem ◽  
J. Th. ◽  
M. De Hosson ◽  
H. Tamler ◽  
H. J. HackelÖEr ◽  
...  
Keyword(s):  
Free Path ◽  
Lattice Relaxation ◽  
Mean Free Path ◽  
Dislocation Motion ◽  
Spin Lattice Relaxation ◽  
Spin Lattice ◽  
Activation Rate ◽  
The Mean ◽  
Influence Of Impurities

ABSTRACTDislocation motion in alkali halide single crystals is strongly impeded by the presence of impurities, apart from obstacles built by the forest dislocations. The mean free path L of stepwise moving dislocations is measured by determination of the spin-lattice relaxation rate 1/T1ρ as a function of the strain rate έ, varying the content of impurities and the temperature. The latter influences the distribution of the point defects and the activation rate of dislocations before obstacles, while the former merely shorten L, thereby raising 1/T1ρ.

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