J/A+A/510/A79 Effective collision strengths for K II (Tayal+, 2010)
Electron impact excitation collision strength for transitions in K II.
Tayal S.S., Zatsarinny O.
<Astron. Astrophys. 510, A79 (2010)>
=2010A&A...510A..79T 2010A&A...510A..79T
ADC_Keywords: Atomic physics
Keywords: atomic data - atomic processes - line formation
Abstract:
Oscillator strengths and electron impact excitation collision
strengths for transitions between the 43 fine-structure levels of the
3p6, 3p5 4s, 3p5 3d, 3p5 4p, 3p5 4d and 3p5 5s
configurations in KII are calculated. Thermally averaged collision
strengths are presented as a function of electron temperature for
application to astrophysical plasmas.
Description:
The B-spline Breit-Pauli R-matrix method is used to investigate the
electron impact excitation of forbidden and allowed transitions in
singly ionized potassium. The relativistic effects have been
incorporated through mass, Darwin and spin-orbit one-body operators in
the Breit-Pauli Hamiltonian in the scattering calculation, while in
the calculation of oscillator strengths the one-body and two-body
relativistic operators are included. Flexible non-orthogonal sets of
spectroscopic and correlation radial functions are used to obtain
accurate description of KII levels and to represent the scattering
functions. The 43 fine-structure levels of the 3p6, 3p5 4s, 3p5
3d, 3p5 4p, 3p5 4d and 3p5 5s configurations have been
considered in both the radiative and scattering calculations.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
levels.dat 21 43 Index and the corresponding level
table2.dat 74 222 Oscillator strengths for dipole radiative E1
transitions in KII
table3.dat 77 903 Collision strengths for transitions in KII
table4.dat 117 903 Effective collision strengths for transitions in KII
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See also:
J/ApJ/526/544 : Collision strengths in SIII (Tayal+, 1999)
J/ApJS/123/295 : Electron impact excitation in FeXI (Gupta+, 1999)
J/A+A/418/363 : Effective collision strengths for ClII (Tayal+, 2004)
J/A+A/426/717 : Oscillator strengths for ClII lines (Tayal+, 2004)
J/ApJS/163/207 : Oscillator and collision strengths in NI (Tayal+, 2006)
J/A+A/486/629 : Effective collision strengths for CII (Tayal, 2008)
Byte-by-byte Description of file: levels.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Index [1,43] Index
4- 21 A18 --- Level Level
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 18 A18 --- Initial Initial level of the transition
20 A1 --- --- [-]
22- 39 A18 --- Final Final level of the transition
41- 42 I2 --- i [1,26] Index of the initial level of the transition
44 A1 --- --- [-]
46- 47 I2 --- j [2,43] Index of the final level of the transition
49- 56 F8.2 0.1nm lambda Wavelength of the transition
58- 64 E7.3 --- f Present length value of oscillator strength
67- 74 E8.3 s-1 A Present length value of transition probability
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- i [1,42] i lower level index of the transition
4 A1 ---- --- [-]
6- 7 I2 --- j [2,43] j upper level index of the transition
9- 17 E9.4 --- CS2.1 Collision strength at 2.1Rydberg
19- 27 E9.4 --- CS4.0 Collision strength at 4.0Rydberg
29- 37 E9.4 --- CS6.0 Collision strength at 6.0Rydberg
39- 47 E9.4 --- CS8.0 Collision strength at 8.0Rydberg
49- 57 E9.4 --- CS12.0 Collision strength at 12.0Rydberg
59- 67 E9.4 --- CS16.0 Collision strength at 16.0Rydberg
69- 77 E9.4 --- CS20.0 Collision strength at 20.0Rydberg
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- i [1,42] i lower level index of the transition
4 A1 ---- --- [-]
6- 7 I2 --- j [2,43] j upper level index of the transition
9- 17 E9.4 --- ECS3.3 Effective collision strength at logT=3.3K
19- 27 E9.4 --- ECS3.6 Effective collision strength at logT=3.6K
29- 37 E9.4 --- ECS3.8 Effective collision strength at logT=3.8K
39- 47 E9.4 --- ECS4.0 Effective collision strength at logT=4.0K
49- 57 E9.4 --- ECS4.2 Effective collision strength at logT=4.2K
59- 67 E9.4 --- ECS4.4 Effective collision strength at logT=4.4K
69- 77 E9.4 --- ECS4.6 Effective collision strength at logT=4.6K
79- 87 E9.4 --- ECS4.8 Effective collision strength at logT=4.8K
89- 97 E9.4 --- ECS5.0 Effective collision strength at logT=5.0K
99-107 E9.4 --- ECS5.3 Effective collision strength at logT=5.3K
109-117 E9.4 --- ECS5.6 Effective collision strength at logT=5.6K
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Acknowledgements:
Swaraj Tayal, stayal(at)cau.edu
(End) Patricia Vannier [CDS] 11-Dec-2009