Direct radiative recombination and photoeffect cross sections for arbitrary atomic Coulomb bound states

1993 ◽  
Vol 3 (8) ◽  
pp. 1227-1239 ◽  
Author(s):  
F. D. Aaron ◽  
A. Costescu ◽  
C. Dinu
Keyword(s):  
Cross Sections ◽  
Radiative Recombination ◽  
Bound States

Reaction rate of n12C radiative capture at temperature from 0.01 to 10 T9

2021 ◽  
pp. 142-148
Author(s):  
S.B. Dubovichenko ◽  
◽  
N.A. Burkova ◽  
R.R. Shamitova ◽  
◽  
...  
Keyword(s):  
Cross Sections ◽  
Cluster Model ◽  
Bound States ◽  
Reaction Rate ◽  
Applied Research ◽  
Radiative Capture ◽  
Potential Cluster Model ◽  
Total Cross Sections ◽  
Forbidden States ◽  
Wide Resonance

Within the framework of a modified potential cluster model with forbidden states, radiation n12C capture at energies from 10-5 keV to 5 MeV is considered, taking into account a wide resonance at Ex = 8.2 MeV. It is shown that on the basis of potentials that are consistent with the energies of the bound states, it is possible to correctly transfer the available experimental data. Based on the obtained total cross sections, the n12C capture reaction rate was calculated. The results for reaction rate are approximated by simple expressions, which simplifies their use in applied research.

Über das Dissoziationsgleichgewicht realer Gase

1966 ◽  
Vol 21 (3) ◽  
pp. 252-255
Author(s):  
H. Koppe ◽  
G. Spies
Keyword(s):  
Cross Sections ◽  
Bound States ◽  
Exact Expression ◽  
Mass Action ◽  
Quantum Mechanical ◽  
Law Of Mass Action ◽  
Vibrational States ◽  
Degree Of Dissociation ◽  
Atom Scattering ◽  
Collision Approximation

The quantum mechanical cluster expansion, when applied to the partition function of a gas consisting of atoms whose bound states are the rotational and vibrational states of diatomic molecules, provides an exact expression for the degree of dissociation. The approximation containing only the second cluster integral is shown to be identical with the law of mass action involving the binary collision approximation for the activity coefficient of the dissociated constituent. This coefficient can be calculated from the phase shifts and thus from the cross sections of the elastic atom-atom-scattering.

High energy photoionization of bound systems

2020 ◽  
Vol 35 (03) ◽  
pp. 2040021
Author(s):  
E. G. Drukarev ◽  
A. I. Mikhailov
Keyword(s):  
Cross Sections ◽  
Bound States ◽  
Wave Equations ◽  
High Energy ◽  
Central Field ◽  
Model Potentials

We demonstrate how the nonrelativistic high energy asymptotics for the photoionization cross sections of systems bound by a central field can be obtained without solving the wave equations. The earlier analysis carried out for s bound states is extended for p states. We show that the physically expected asymptotics for ionization of fullerenes is not reproduced by the model potentials employed nowadays.

An experimental investigation of small angle photon elastic scattering

1979 ◽  
Vol 57 (3) ◽  
pp. 343-352 ◽  
Author(s):  
N. Ramanathan ◽  
T. J. Kennett ◽  
W. V. Prestwich
Keyword(s):  
Experimental Investigation ◽  
Elastic Scattering ◽  
Cross Sections ◽  
Small Angle ◽  
Differential Cross ◽  
Bound States ◽  
Scattering Amplitude ◽  
Form Factors ◽  
Differential Cross Sections

The differential cross sections for photon elastic scattering have been determined for targets of Cu, Cd, Ta, and Pb, at angles of 2.4, 3.5, 5.1., 6.0, 8.0, and 10.0° and incident energies of 244.7, 344.3, 443.9, 778.9, 964.0, 1085.8, 1112.0, 1274.2, and 1408.0 keV. The data indicate that presently calculated form factors may be too large, and suggest that intermediate bound states may influence the scattering amplitude.

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