scholarly journals Instrument-independent cad spectral databases: absolute cross-section measurements in QQQ instruments

1987 ◽  
Vol 92 (3) ◽  
pp. 229 ◽  
Author(s):  
R.I. Martinez ◽  
S. Dheandhanoo
Keyword(s):  
Cross Section ◽  
Absolute Cross Section ◽  
Spectral Databases

Absolute inner-shell cross section determination for EELS analysis

1988 ◽  
Vol 46 ◽  
pp. 534-535
Author(s):  
P.A. Crozier
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Absolute Cross Section ◽  
Specimen Thickness ◽  
Mass Thickness ◽  
Scattering Cross ◽  
Before And After ◽  
Estimated Error ◽  
Scattering Cross Sections ◽  
Electron Microscopist

Absolute inelastic scattering cross sections or mean free paths are often used in EELS analysis for determining elemental concentrations and specimen thickness. In most instances, theoretical values must be used because there have been few attempts to determine experimental scattering cross sections from solids under the conditions of interest to electron microscopist. In addition to providing data for spectral quantitation, absolute cross section measurements yields useful information on many of the approximations which are frequently involved in EELS analysis procedures. In this paper, experimental cross sections are presented for some inner-shell edges of Al, Cu, Ag and Au.Uniform thin films of the previously mentioned materials were prepared by vacuum evaporation onto microscope cover slips. The cover slips were weighed before and after evaporation to determine the mass thickness of the films. The estimated error in this method of determining mass thickness was ±7 x 107g/cm2. The films were floated off in water and mounted on Cu grids.

The absolute cross section for photoionization of O2(1Δg)

1970 ◽  
Vol 18 (4) ◽  
pp. 523-531 ◽  
Author(s):  
I.D. Clark ◽  
R.P. Wayne
Keyword(s):  
Cross Section ◽  
Absolute Cross Section ◽  
The Absolute

scholarly journals Photoionisation Cross Sections of Chlorine Atoms and Molecules at 584 Å

1986 ◽  
Vol 39 (5) ◽  
pp. 779 ◽  
Author(s):  
WJ van der Meer ◽  
RJ Butselaar ◽  
CA de Lange
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Ground State ◽  
Modulation Method ◽  
Absolute Cross Section ◽  
Molecular Chlorine ◽  
Chlorine Atoms ◽  
Atoms And Molecules ◽  
Ionic States ◽  
State Ionic

A recently developed modulation method is used to obtain cross sections for the photoionisation of ground state neutral to ground state ionic, atomic and molecular chlorine relative to that of the HCl + (X2n 1IZ,3IZ) +-- HCl(XI ~ +) transition at the He Ia wavelength. With the known absolute cross section of the latter process, determined by (e,2e) coincidence spectroscopy, the present ell,periments provide absolute photoionisation cross sections of the CI + epz,l,o) +-- Clep) and Cli (XZ n g, 1IZ,3 IZ) +-- Clz (X I ~ t) transitions. Relative cross sections, previously determined for the transitions to the additional Cl and Clz ionic states accessible with He Ia radiation, are used to obtain absolute cross sections for the Cl+(IDz, ISO) +-- Clep) and Cli(AZnu,1IZ,3IZ, BZ~t) +-- Clz(XI~t) ionisation processes.

scholarly journals Absolute cross section forLi7(d,p)Li8and solar neutrino capture rates

1982 ◽  
Vol 25 (5) ◽  
pp. 2174-2180 ◽  
Author(s):  
B. W. Filippone ◽  
A. J. Elwyn ◽  
W. Ray ◽  
D. D. Koetke
Keyword(s):  
Cross Section ◽  
Solar Neutrino ◽  
Absolute Cross Section ◽  
Capture Rates

Absolute cross section of first-order Raman scattering in GaAs

1979 ◽  
Vol 20 (4) ◽  
pp. 1758-1761 ◽  
Author(s):  
M. H. Grimsditch ◽  
D. Olego ◽  
M. Cardona
Keyword(s):  
Raman Scattering ◽  
Cross Section ◽  
Absolute Cross Section ◽  
First Order

Absolute Cross Section of the Reaction Cu63(γ, n)Cu62 for Lithium Gamma Rays

1960 ◽  
Vol 15 (11) ◽  
pp. 1913-1919 ◽  
Author(s):  
Shinjiro Yasumi ◽  
Minoru Yata ◽  
Kunio Takamatsu ◽  
Akira Masaike ◽  
Yoshiko Masuda
Keyword(s):  
Cross Section ◽  
Gamma Rays ◽  
Absolute Cross Section

scholarly journals Absolute cross section measurements of 238U(n,f) and 237Np(n,f) in the neutron energy range 1-2.4 MeV

2019 ◽  
Vol 211 ◽  
pp. 03009
Author(s):  
Paula Salvador-Castiñeira ◽  
Franz-Josef Hambsch ◽  
Alf Göök ◽  
Marzio Vidali ◽  
Nigel P. Hawkes ◽  
...  
Keyword(s):  
Cross Section ◽  
Neutron Energy ◽  
Cross Sections ◽  
Energy Region ◽  
Power Plants ◽  
National Physical Laboratory ◽  
Absolute Cross Section ◽  
Neutron Energy Range ◽  
Physical Laboratory ◽  
Low Energies

New standard (n,f) cross sections other than 235U are important to study the relevant cross sections for Generation-IV power plants. A specific need for such standards is for performing new experiments with quasimonoenergetic neutron beams, such as those produced by Van de Graaf accelerators. Neutrons down-scattered to low energies in the experimental environment, so called room-return, become relevant for this type of measurements. Hence, a standard (n,f) cross section with a fission threshold is of great interest, in order to suppress the contribution from room-return background. For this reason we have performed two experiments at the VDG of the National Physical Laboratory to measure absolutely the (n,f) cross sections of 235U, 238U and 237Np in the fast neutron energy region. Our preliminary results are in agreement with the most up-to-date evaluations.

Absolute Cross Section for the ReactionC12(p,pn)C11at High Energy

1948 ◽  
Vol 73 (1) ◽  
pp. 80-81 ◽  
Author(s):  
Edwin M. Mcmillan ◽  
Richard D. Miller
Keyword(s):  
Cross Section ◽  
High Energy ◽  
Absolute Cross Section

Absolute cross section of the3He(?,?)7Be reaction

1988 ◽  
Vol 329 (2) ◽  
pp. 243-254 ◽  
Author(s):  
M. Hilgemeier ◽  
H. W. Becker ◽  
C. Rolfs ◽  
H. P. Trautvetter ◽  
J. W. Hammer
Keyword(s):  
Cross Section ◽  
Absolute Cross Section
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