Effective collision strengths for optically allowed transitions among degenerate levels of hydrogenic ions with 2{<=}Z{<=}30

Journal Article · Wed Sep 15 00:00:00 EDT 2010 · Atomic Data and Nuclear Data Tables

DOI:https://doi.org/10.1016/j.adt.2010.02.001· OSTI ID:21417223

Hamada, K ^[1]; Akita, K; Igarashi, A ^[1]; Keenan, F P ^[2]; Nakazaki, S ^[1]

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1. Department of Applied Physics, Faculty of Engineering, University of Miyazaki, Miyazaki 889-2192 (Japan)
2. Astrophysics Research Centre, School of Mathematics and Physics, Queen's University Belfast, Belfast BT7 1NN (United Kingdom)

The Coulomb-Born approximation is used to calculate electron-impact excitation collision strengths and effective collision strengths for optically allowed transitions among degenerate fine-structure levels of hydrogenic ions with 2{<=}Z{<=}30 and n{<=}5. Collision strengths are calculated over a wide range of energies up to E{sub j}/Z{sup 2}=10Ryd. Effective collision strengths are obtained over a wide temperature range up to 10{sup 8}K by integrating the collision strengths over a Maxwellian distribution of electron velocities.

• OSTI ID: 21417223
• Journal Information: Atomic Data and Nuclear Data Tables, Vol. 96, Issue 5; Other Information: DOI: 10.1016/j.adt.2010.02.001; PII: S0092-640X(10)00012-4; Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0092-640X
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
BORN APPROXIMATION
ELECTRON BEAMS
EXCITATION
FINE STRUCTURE
HYDROGEN IONS
ION COLLISIONS
TEMPERATURE RANGE OVER 4000 K
APPROXIMATIONS
BEAMS
CALCULATION METHODS
CHARGED PARTICLES
COLLISIONS
ENERGY-LEVEL TRANSITIONS
IONS
LEPTON BEAMS
PARTICLE BEAMS
TEMPERATURE RANGE