Measuring cesium electron impact cross-sections using a magneto-optical trap

2002 ◽  
Vol 123 (2-3) ◽  
pp. 173-184 ◽  
Author(s):  
J.A. MacAskill ◽  
W. Kedzierski ◽  
J.W. McConkey ◽  
J. Domyslawska ◽  
I. Bray
Keyword(s):  
Electron Impact ◽  
Cross Sections ◽  
Optical Trap ◽  
Magneto Optical Trap

New measurements of absolute total cross sections for electron impact on caesium using a magneto-optical trap

2005 ◽  
Vol 38 (19) ◽  
pp. 3535-3545 ◽  
Author(s):  
M Łukomski ◽  
J A MacAskill ◽  
D P Seccombe ◽  
C McGrath ◽  
S Sutton ◽  
...  
Keyword(s):  
Electron Impact ◽  
Cross Sections ◽  
Optical Trap ◽  
Magneto Optical Trap ◽  
Total Cross Sections

Photoionization cross-sections of the first excited states of sodium and lithium in a magneto-optical trap

2001 ◽  
Vol 17 (3) ◽  
pp. 285-291 ◽  
Author(s):  
V. Wippel ◽  
C. Binder ◽  
W. Huber ◽  
L. Windholz ◽  
M. Allegrini ◽  
...  
Keyword(s):  
Excited States ◽  
Cross Sections ◽  
Optical Trap ◽  
Magneto Optical Trap

scholarly journals Photoionization of the francium 7P3/2 state

2017 ◽  
Vol 95 (3) ◽  
pp. 234-237
Author(s):  
R. Collister ◽  
J. Zhang ◽  
M. Tandecki ◽  
S. Aubin ◽  
E. Gomez ◽  
...  
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Optical Trap ◽  
Photoionization Cross Section ◽  
Magneto Optical Trap ◽  
Alkali Atoms ◽  
Simple Extrapolation ◽  
Photoionization Rate

We have measured the non-resonant photoionization cross section of the 7P3/2 state of francium for 442 nm light to be 20.8 ± 7.1 Mb. Atoms were irradiated in a magneto-optical trap, and we deduce the photoionization rate from the change in trap lifetime. The result is consistent with a simple extrapolation of known cross sections for other alkali atoms.

Electron Collision Cross-Sections Measured with the Use of a Magneto-Optical Trap

1995 ◽  
Vol 29 (6) ◽  
pp. 439-444 ◽  
Author(s):  
R. S Schappe ◽  
P Feng ◽  
L. W Anderson ◽  
C. C Lin ◽  
T Walker
Keyword(s):  
Cross Sections ◽  
Optical Trap ◽  
Electron Collision ◽  
Magneto Optical Trap ◽  
Collision Cross Sections

The measurement of inner-shell ionization cross aections by electron impact in a TEM

1992 ◽  
Vol 50 (2) ◽  
pp. 1266-1267
Author(s):  
Raynald Gauvin ◽  
Gilles L'Espérance
Keyword(s):  
Electron Impact ◽  
Cross Sections ◽  
Weight Fraction ◽  
Thin Foil ◽  
Specimen Thickness ◽  
Ionization Cross ◽  
Electron Dose ◽  
Total Electron ◽  
Inner Shell Ionization ◽  
Shell Ionization

Values of cross sections for ionization of inner-shell electrons by electron impact are required for electron probe microanalysis, Auger-electron spectroscopy and electron energy-loss spectroscopy. In this work, the results of the measurement of inner-shell ionization cross-sections by electron impact, Q, in a TEM are presented for the K shell.The measurement of QNi has been performed at 120 KeV in a TEM by measuring the net X-ray intensity of the Kα line of Ni, INi, which is related to QNi by the relation :(1)where i is the total electron dose, (Ω/4π)is the fractional solid angle, ω is the fluorescence yield, α is the relative intensity factor, ε is the Si (Li) detector efficiency, A is the atomic weight, ρ is the sample density, No is Avogadro's number, t' is the distance traveled by the electrons in the specimen which is equal to τ sec θ neglecting beam broadening where τ is the specimen thickness and θ is the angle between the electron beam and the normal of the thin foil and CNi is the weight fraction of Ni.

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