scholarly journals MEASUREMENTS OF ELECTRON-HELIUM ABSOLUTE TOTAL CROSS SECTIONS FROM I TO 50eV USING A TIME-OF-FLIGHT SPECTROMETER

1994 ◽  
Vol 43 (3) ◽  
pp. 380
Author(s):  
LI TAI-HUA ◽  
FENG AN-PING ◽  
YANG YONG
Keyword(s):  
Cross Sections ◽  
Time Of Flight ◽  
Total Cross Sections

Neutron Total Cross Sections in the kev Region by Fast Time-of-Flight Measurements

1958 ◽  
Vol 109 (3) ◽  
pp. 926-933 ◽  
Author(s):  
W. M. Good ◽  
J. H. Neiler ◽  
J. H. Gibbons
Keyword(s):  
Cross Sections ◽  
Time Of Flight ◽  
Fast Time ◽  
Total Cross Sections ◽  
Flight Measurements

Total cross sections for fast neutrons by a time of flight method

Physica ◽  
1958 ◽  
Vol 24 (1-5) ◽  
pp. 331-342 ◽  
Author(s):  
P. Huijer ◽  
C.C. Jonker ◽  
J. van den Berg ◽  
J. Rethmeier
Keyword(s):  
Cross Sections ◽  
Time Of Flight ◽  
Fast Neutrons ◽  
Total Cross Sections ◽  
Time Of Flight Method

26. A time of flight method for the measurement of total cross-sections for fast neutrons

Physica ◽  
1956 ◽  
Vol 22 (6-12) ◽  
pp. 1137
Author(s):  
P. Huyer ◽  
C.C. Jonker ◽  
J. Van den Berg ◽  
J. Rethmeier
Keyword(s):  
Cross Sections ◽  
Time Of Flight ◽  
Fast Neutrons ◽  
Total Cross Sections ◽  
Time Of Flight Method

Analysis of STEM micrographs of thick objects

1978 ◽  
Vol 36 (2) ◽  
pp. 106-107
Author(s):  
S. Golladay
Keyword(s):  
Inelastic Scattering ◽  
Multiple Scattering ◽  
Mass Distribution ◽  
Cross Sections ◽  
Phase Contrast ◽  
Image Point ◽  
Contrast Effects ◽  
Total Cross Sections ◽  
Elastic And Inelastic Scattering

The theory of multiple scattering has been worked out by Groves and comparisons have been made between predicted and observed signals for thick specimens observed in a STEM under conditions where phase contrast effects are unimportant. Independent measurements of the collection efficiencies of the two STEM detectors, calculations of the ratio σe/σi = R, where σe, σi are the total cross sections for elastic and inelastic scattering respectively, and a model of the unknown mass distribution are needed for these comparisons. In this paper an extension of this work will be described which allows the determination of the required efficiencies, R, and the unknown mass distribution from the data without additional measurements or models. Essential to the analysis is the fact that in a STEM two or more signal measurements can be made simultaneously at each image point.

scholarly journals Total cross sections of eγ → $$ eX\overline{X} $$ processes with X = μ, γ, e via multiloop methods

2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
Roman N. Lee ◽  
Alexey A. Lyubyakin ◽  
Vyacheslav A. Stotsky
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Elliptic Integral ◽  
High Energy ◽  
Calculation Methods ◽  
Complete Elliptic Integral ◽  
Total Cross Sections ◽  
Multiloop Calculation ◽  
The Cross ◽  
Analytical Expressions

Abstract Using modern multiloop calculation methods, we derive the analytical expressions for the total cross sections of the processes e−γ →$$ {e}^{-}X\overline{X} $$ e − X X ¯ with X = μ, γ or e at arbitrary energies. For the first two processes our results are expressed via classical polylogarithms. The cross section of e−γ → e−e−e+ is represented as a one-fold integral of complete elliptic integral K and logarithms. Using our results, we calculate the threshold and high-energy asymptotics and compare them with available results.

Positronium- and positron–H2O total cross sections

2006 ◽  
Vol 39 (6) ◽  
pp. 1337-1344 ◽  
Author(s):  
J Beale ◽  
S Armitage ◽  
G Laricchia
Keyword(s):  
Cross Sections ◽  
Total Cross Sections

Justification of a Simple Ramsauer Model for Neutron Total Cross Sections

1998 ◽  
Vol 130 (3) ◽  
pp. 340-347 ◽  
Author(s):  
S. M. Grimes ◽  
J. D. Anderson ◽  
R. W. Bauer ◽  
V. A. Madsen
Keyword(s):  
Cross Sections ◽  
Total Cross Sections

Neutron total cross sections in the energy range 80 to 150 MeV

1966 ◽  
Vol 85 (1) ◽  
pp. 129-141 ◽  
Author(s):  
D.F. Measday ◽  
J.N. Palmieri
Keyword(s):  
Energy Range ◽  
Cross Sections ◽  
Total Cross Sections

Total Cross Sections of Liquefied Gases for High-Energy Neutrons

1954 ◽  
Vol 96 (1) ◽  
pp. 115-120 ◽  
Author(s):  
Peter Hillman ◽  
R. H. Stahl ◽  
N. F. Ramsey
Keyword(s):  
Cross Sections ◽  
High Energy ◽  
Total Cross Sections
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