Molecular photoionization cross sections and asymmetry parameters by L2 basis functions calculations: H2O

1986 ◽  
Vol 85 (12) ◽  
pp. 7038-7045 ◽  
Author(s):  
I. Cacelli ◽  
V. Carravetta ◽  
R. Moccia
Keyword(s):  
Cross Sections ◽  
Basis Functions ◽  
Molecular Photoionization ◽  
Asymmetry Parameters

scholarly journals Absolute cross sections and asymmetry parameters for photodetachment of C−(4So)

2021 ◽  
Vol 103 (2) ◽  
Author(s):  
Raphaël Marion ◽  
Kevin M. Dunseath ◽  
Mariko Terao-Dunseath ◽  
Xavier Urbain
Keyword(s):  
Cross Sections ◽  
Asymmetry Parameters

Photoionization Cross Sections and Asymmetry Parameters for the Valence Shell of Methanol

2012 ◽  
Vol 116 (48) ◽  
pp. 11913-11919 ◽  
Author(s):  
C. Lavín ◽  
M. V. Vega ◽  
A. M. Velasco
Keyword(s):  
Cross Sections ◽  
Valence Shell ◽  
Asymmetry Parameters

scholarly journals 2-D reconstruction of atmospheric concentration peaks from horizontal long path DOAS tomographic measurements: parametrisation and geometry within a discrete approach

2006 ◽  
Vol 6 (3) ◽  
pp. 847-861 ◽  
Author(s):  
A. Hartl ◽  
B. C. Song ◽  
I. Pundt
Keyword(s):  
Cross Sections ◽  
Measurement Errors ◽  
Concentration Field ◽  
Basis Functions ◽  
Linear Functions ◽  
Background Concentration ◽  
Atmospheric Concentration ◽  
Piecewise Constant ◽  
Reconstruction Quality ◽  
Norm Principle

Abstract. In this study, we theoretically investigate the reconstruction of 2-D cross sections through Gaussian concentration distributions, e.g. emission plumes, from long path DOAS measurements along a limited number of light paths. This is done systematically with respect to the extension of the up to four peaks and for six different measurement setups with 2-4 telescopes and 36 light paths each. We distinguish between cases with and without additional background concentrations. Our approach parametrises the unknown distribution by local piecewise constant or linear functions on a regular grid and solves the resulting discrete, linear system by a least squares minimum norm principle. We show that the linear parametrisation not only allows better representation of the distributions in terms of discretisation errors, but also better inversion of the system. We calculate area integrals of the concentration field (i.e. total emissions rates for non-vanishing perpendicular wind speed components) and show that reconstruction errors and reconstructed area integrals within the peaks for narrow distributions crucially depend on the resolution of the reconstruction grid. A recently suggested grid translation method for the piecewise constant basis functions, combining reconstructions from several shifted grids, is modified for the linear basis functions and proven to reduce overall reconstruction errors, but not the uncertainty of concentration integrals. We suggest a procedure to subtract additional background concentration fields before inversion. We find large differences in reconstruction quality between the geometries and conclude that, in general, for a constant number of light paths increasing the number of telescopes leads to better reconstruction results. It appears that geometries that give better results for negligible measurement errors and parts of the geometry that are better resolved are also less sensitive to increasing measurement errors.

Cross Sections and Asymmetry Parameters for Formic Acid in the Vacuum-Ultraviolet Energy Range

2020 ◽  
Vol 124 (32) ◽  
pp. 6478-6485
Author(s):  
M. M. Fujimoto ◽  
H. K. Tanaka ◽  
R. R. T. Marinho ◽  
A. Medina ◽  
F. V. Prudente ◽  
...  
Keyword(s):  
Formic Acid ◽  
Energy Range ◽  
Cross Sections ◽  
Vacuum Ultraviolet ◽  
Ultraviolet Energy ◽  
Asymmetry Parameters

COUPLED-CHANNELS ANALYSES OF 6He BREAKUP REACTIONS

2009 ◽  
Vol 24 (11) ◽  
pp. 2191-2197 ◽  
Author(s):  
T. MATSUMOTO ◽  
T. EGAMI ◽  
K. OGATA ◽  
Y. ISERI ◽  
M. KAMIMURA ◽  
...  
Keyword(s):  
Cross Sections ◽  
Reaction System ◽  
Basis Functions ◽  
Coulomb Breakup ◽  
Body Model ◽  
Coupled Channels ◽  
Gaussian Basis Functions ◽  
Three Body ◽  
Good Agreement ◽  
The Continuum

We present analyses of breakup effects of 6 He on the elastic scattering by the continuum-discretized coupled-channels method, in which the reaction system is described as a four-body model, n+n+4 He +target. In this analysis, three-body breakup continuum of 6 He is discretized by daiagonalizing the internal Hamiltonian of 6 He in a space spanned by the Gaussian basis functions. The calculated elastic cross sections are in good agreement with the experimental data, which shows that nuclear and Coulomb breakup effects are significant.

HeI asymmetry parameters and partial photoionization cross-sections of CFCL3

1988 ◽  
Vol 46 (2) ◽  
pp. 405-410 ◽  
Author(s):  
C. Cauletti ◽  
C. Puliti ◽  
J. Kreile ◽  
H.-D. Kurland ◽  
A. Schweig ◽  
...  
Keyword(s):  
Cross Sections ◽  
Asymmetry Parameters

Measurement of cross sections and asymmetry parameters for the production of charged pions from various nuclei by 585-MeV protons

1980 ◽  
Vol 22 (3) ◽  
pp. 1184-1196 ◽  
Author(s):  
J. F. Crawford ◽  
M. Daum ◽  
G. H. Eaton ◽  
R. Frosch ◽  
H. Hirschmann ◽  
...  
Keyword(s):  
Cross Sections ◽  
Charged Pions ◽  
Asymmetry Parameters ◽  
Mev Protons
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