Jensen–Tsallis divergence and atomic dissimilarity for ionized systems in conjugated spaces

2011 ◽  
Vol 390 (4) ◽  
pp. 769-780 ◽  
Author(s):  
J.C. Angulo ◽  
J. Antolín ◽  
S. López-Rosa ◽  
R.O. Esquivel
Keyword(s):  
Ionized Systems

scholarly journals Cobalt-Hydrogen Atomic and Ionic Collisional Data

Atoms ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 34
Author(s):  
Svetlana A. Yakovleva ◽  
Andrey K. Belyaev ◽  
Maria Bergemann
Keyword(s):  
Local Thermodynamic Equilibrium ◽  
Ion Pair ◽  
Pair Formation ◽  
Stellar Atmospheres ◽  
Rate Coefficients ◽  
Line Formation ◽  
Non Local ◽  
Excitation Processes ◽  
Inelastic Processes ◽  
Ionized Systems

Rate coefficients for inelastic processes in low-energy Co + H, Co + + H − , Co + + H , and Co 2 + + H − collisions are estimated using the quantum simplified model. Considerations include 44 triplet and 55 quintet molecular states of CoH, as well as 91 molecular states of CoH + . The estimations provide the rate coefficients for the 4862 partial processes (mutual neutralization, ion-pair formation, excitation, and de-excitation) in the neutral CoH system, and for the 8190 partial processes in the ionized CoH + system, 13 , 052 processes in total. At T = 6000 K, the rate coefficients with the largest values around 6 × 10 − 8 cm 3 s − 1 correspond to the mutual neutralization processes into the Co ( e 2 F ) + H and Co + ( g 5 F ) + H final channels in the neutral and ionized systems, respectively. Among the excitation and de-excitation processes in Co + H and in Co + + H collisions, at T = 6000 K, the largest rate coefficients have values around 7 × 10 − 9 cm 3 s − 1 and correspond to the processes Co ( y 2 S ∘ ) + H → Co ( e 2 F ; v 4 D ∘ ) + H and Co + ( h 3 P ) + H → Co + ( g 3 P ; g 5 P ; g 5 F ) + H , respectively. The calculations single out inelastic processes important for non-local thermodynamic equilibrium (NLTE) modelling of Co I and Co II spectra in stellar atmospheres. The test NLTE calculations are carried out, and it is found that the new collision rates have a strong effect on the line formation and NLTE abundance corrections.

scholarly journals A 1D kinetic model for cosmic microwave background comptonization

2020 ◽  
Vol 66 (3 May-Jun) ◽  
pp. 352
Author(s):  
A. Sandoval-Villalbazo
Keyword(s):  
Kinetic Model ◽  
Evolution Equation ◽  
Cosmic Microwave Background ◽  
Statistical Physics ◽  
Photon Number ◽  
Microwave Background ◽  
One Dimensional ◽  
Radiative Processes ◽  
Physical Features ◽  
Ionized Systems

This work presents a novel derivation of the expressions that  describe the distortions of the CMB curve due to the interactions between photons and the electrons present in dilute ionized systems. In this approach, a simplified a one-dimensional evolution  equation for the photon number occupation is applied  in order to describe the aforemationed interaction. This methodology allows to emphasize the physical features ot the Sunyaev-Zeldovich effect and suggests the existence of links between basic statistical physics and complex applications involving radiative processes.

Photoionization of Excited and Ionized Systems

1996 ◽  
pp. 561-605 ◽  
Author(s):  
F. J. Wuilleumier ◽  
J. B. West
Keyword(s):  
Ionized Systems

Plasma Parameters and Weakly Non-Ideal Behaviour of a High Density, Super-Atmospheric 2kA Cascade Arc in Argon

1988 ◽  
Vol 43 (8-9) ◽  
pp. 806-818 ◽  
Author(s):  
C. J. Timmermans ◽  
G. M. W. Kroesen ◽  
P. M. Vallinga ◽  
D. C. Schram
Keyword(s):  
Thermal Plasma ◽  
Spectroscopic Studies ◽  
Continuum Emission ◽  
Plasma Parameters ◽  
Ionization Degree ◽  
Cascade Arc ◽  
Far Ultraviolet ◽  
Ideal Plasma ◽  
A Current ◽  
Ionized Systems

AbstractExperimental results are reported for simultaneous pressure and current pulses up to 14 bar and 2200 A superimposed on an atmospheric pressure 60 A dc cascade arc. A current density over 108 A/m2, previously 107 A/m2 (power density 1012W m3, previously 1010W/m3) has been ob­tained. The electron temperature of the thermal plasma was deduced from the end-on measured radiance of argon lines, and the electron density from the absolute continuum emission. The values found for the quantities mentioned during the quasi-stationary phase of the current pulse, lasting ~ 1 ms, were 27000 K and 3 · 1023 m-3, respectively, at a pressure of ~ 1.5 bar (ionization degree 100%), and 18000 K and > 1024 m-3, respectively, for a pressure of 14 bar (ionization degree 60%). These values satisfy the LTE relation. Deviations from the Spitzer conductivity have been observed in this weakly non-ideal plasma.In general, the high ionized thermal plasma studied with its composition of neutral, singly ionized and doubly ionized argon atoms can serve as a useful medium for spectroscopic studies of highly ionized systems and as a valuable source of radiation in the visible a well as in the near and far ultraviolet parts of the spectrum.

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