States 2p6, 2p53s, 2p53p, and 2p54s of the Ne. II. oscillator strengths and electron collision excitation cross sections

1968 ◽  
Vol 9 (1) ◽  
pp. 684-690 ◽  
Author(s):  
L. A. Vainshtein ◽  
L. A. Minaeva
Keyword(s):  
Cross Sections ◽  
Oscillator Strengths ◽  
Electron Collision ◽  
Excitation Cross Sections

scholarly journals Electron Impact Excitation Cross Sections for B III

1983 ◽  
Vol 36 (5) ◽  
pp. 659
Author(s):  
PS Ganas ◽  
M Aryafar ◽  
LP Gately
Keyword(s):  
Electron Impact ◽  
Excited States ◽  
Cross Sections ◽  
Born Approximation ◽  
Oscillator Strengths ◽  
Impact Excitation ◽  
Electron Impact Excitation ◽  
Central Potential ◽  
Excitation Cross Sections ◽  
Generalized Oscillator

A realistic analytical central potential with two adjustable parameters is used to generate wavefunctions for the ground and excited states of doubly ionized boron. Generalized oscillator strengths and integrated cross sections from threshold up to 5 keY are calculated in the Born approximation for 2s-ns, 2s-np and 2s-nd excitations. Convenient analytic formulae for the cross sections are presented.

scholarly journals Drift Velocity and Longitudinal Diffusion Coefficient of Electrons in CO2?Ar Mixtures and Electron Collision Cross Sections for CO2 Molecules

1995 ◽  
Vol 48 (3) ◽  
pp. 357 ◽  
Author(s):  
Y Nakamura
Keyword(s):  
Diffusion Coefficient ◽  
Momentum Transfer ◽  
Cross Section ◽  
Drift Velocity ◽  
Cross Sections ◽  
Vibrational Excitation ◽  
Electron Collision ◽  
Longitudinal Diffusion ◽  
Excitation Cross Sections ◽  
Momentum Transfer Cross Section

The drift velocity and longitudinal diffusion coefficient of electrons in 0�2503% and 1� 97% C02-Ar mixtures were measured for 0�03 ~ E/N ~ 20 Td. The measured electron swarm parameters in the mixtures were used to derive a set of consistent vibrational excitation cross sections for the C02 molecule. Analysis of electron swarms in pure C02 using the present vibrational excitation cross sections was also carried out in order to determine a new momentum transfer cross section for the C02 molecule.

scholarly journals Summary of the IRON and OPACITY Projects

1995 ◽  
Vol 10 ◽  
pp. 571-572
Author(s):  
Keith A. Berrington
Keyword(s):  
Cross Sections ◽  
Electron Excitation ◽  
Oscillator Strengths ◽  
Atomic Data ◽  
Resonance Structure ◽  
Quantum Numbers ◽  
Sufficient Detail ◽  
Excitation Cross Sections ◽  
Light Ions ◽  
On Line

Considerable effort has been made recently by international collaborations, exploiting advances in atomic physics and in supercomputing, to compute complete sets of accurate data for astrophysically important processes; in particular, the Opacity Project and the IRON Project.The Opacity Project computed atomic data for opacity calculations• for H, He, Li, Be, B, C, N, O, F, Ne, Na, Mg, Al, Si, S, Ar, Ca, Fe.• energies of terms having effective quantum numbers v≤10 and total angular momentum L≤3 or 4, all spin and parity combinations;• gƒ-values for all dipole transitions between these bound terms;• total cross sections for photoionizaion from all calculated bound terms, tabulated on a grid of photon energies suitable to describe the resonance structure in sufficient detail to calculate reliable opacities;• line broadening parameters.28 key research papers arising from the Project, together with calculated energies and oscillator strengths for light ions, are reprinted in ‘The Opacity Project Volume 1’ (Opacity Project Team, 1994, IOP Publ. ISBN 0 7503 0288 7). All data are available from TOPbase, an on-line database at the CDS (Cunto et al. 1993, A&A 275, L5).The IRON Project aims to systematically compute electron excitation cross sections for the iron group of elements. Particular attention is given to requirements for the interpretation of data from specific space observations.In the first stage of the Project excitation cross sections have been computed for fine-structure transitions in the ground configuration of all ions of astrophysical interest. These data are essential for the interpretation of IR lines to be observed by ISO, as well as for coronal spectra.

Consistent QED approach to calculation of electron-collision excitation cross sections and strengths: Ne-like ions

2005 ◽  
Vol 104 (4) ◽  
pp. 562-569 ◽  
Author(s):  
Alexander V. Glushkov ◽  
Sergey V. Ambrosov ◽  
Andrey V. Loboda ◽  
Elena P. Gurnitskaya ◽  
Georgy P. Prepelitsa
Keyword(s):  
Cross Sections ◽  
Electron Collision ◽  
Excitation Cross Sections

Effective Oscillator Strengths of Neon from Electron Impact Excitation

1975 ◽  
Vol 53 (9) ◽  
pp. 850-853 ◽  
Author(s):  
D. Roy ◽  
J.-D. Carette
Keyword(s):  
Experimental Data ◽  
Electron Impact ◽  
Cross Sections ◽  
Electronic States ◽  
Oscillator Strengths ◽  
Impact Excitation ◽  
Electron Impact Excitation ◽  
Excitation Cross Sections ◽  
Relative Excitation ◽  
Good Agreement

From experimental data about relative excitation cross sections of many electronic states of neon, the effective oscillator strengths of these transitions have been computed. There is a good agreement between these results and the single available value of optical oscillator strength.

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