J/A+A/489/1377 OVII radiative and excitation rates (Aggarwal+, 2008)
Energy levels, radiative rates, and electron impact excitation rates for
transitions in O VII.
Aggarwal K.M., Keenan F.P.
<Astron. Astrophys. 489, 1377 (2008)>
=2008A&A...489.1377A 2008A&A...489.1377A
ADC_Keywords: Atomic physics
Keywords: atomic data - atomic processes
Abstract:
In this paper we report calculations for energy levels, radiative
rates, and electron impact excitation rates for transitions in OVII.
The GRASP (general-purpose relativistic atomic structure package) is
adopted for calculating energy levels and radiative rates. For
determining the collision strengths and subsequently the excitation
rates, the Dirac atomic R-matrix code (DARC) and the flexible atomic
code (FAC) are used.
Oscillator strengths, radiative rates, and line strengths are reported
for all E1, E2, M1, and M2 transitions among the lowest 49 levels of
OVII. Collision strengths have been averaged over a Maxwellian
velocity distribution, and the resulting effective collision strengths
are reported over a wide temperature range below 2x106K.
Additionally, lifetimes are also listed for all levels.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 81 49 Energy levels (in Ryd) of O VII
table2.dat 75 936 Transition wavelengths, radiative rates, oscillator
strengths and line strengths for electric dipole (E1),
and Aji for E2, M1 and M2 transitions in O VII
table6.dat 95 1176 Effective collision strengths for transitions in O VII
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See also:
J/A+A/486/1053 : O IV radiative and excitation rates (Aggarwal+, 2008)
J/ApJS/123/311 : Excitation rate coefficients for O III (Aggarwal+, 1999)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Index [1/49] Index
4- 19 A16 --- Conf Configuration/Level
21- 28 F8.5 Ry NIST ? Theoretical threshold energy (1)
30- 37 F8.5 Ry GRASP1 Energy from the GRASP code with 49 level
calculations without Breit and QED effects
39- 46 F8.5 Ry GRASP2 Energy from the GRASP code with 49 level
calculations with Breit and QED effects
48- 55 F8.5 Ry FAC1 Energy from the FAC code with 49 level
calculations
57- 64 F8.5 Ry FAC2 Energy from the FAC code with 71 level
calculations
66- 73 F8.5 Ry SS ? Energy of Delahaye & Pradhan
(2002, J. Phys. B, 35, 3377) from the SS code
74- 81 F8.5 Ry MBPT ? Energy of Savukov et al.
(2003, ADNDT, 85, 83) from the MBPT code
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Note (1): NIST: http://physics.nist.gov/PhysRefData
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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- 2 I2 --- i [1/48] Lower level
4- 5 I2 --- j [2/49] Upper level
7- 15 E9.4 0.1nm lambda Transition wavelength, λij
17- 25 E9.4 s-1 AjiE1 Electric dipole (E1) radiative rate
27- 35 E9.4 --- fijE1 Electric dipole (E1) oscillator strength
37- 45 E9.4 --- SE1 Electric dipole (E1) line strength
(in atomic unit)
47- 55 E9.4 s-1 AjiE2 Electric quadrupole (E2) radiative rate
57- 65 E9.4 --- AjiM1 Magnetic dipole (M1) radiative rate
67- 75 E9.4 --- AjiM2 Magnetic quadrupole (M2) radiative rate
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- i [1/48] i index of transition
4- 5 I2 --- j [2/49] j index of transition
7- 14 E8.3 --- ECS4.000 Effective collision strength for logTe=4.000
16- 23 E8.3 --- ECS4.477 Effective collision strength for logTe=4.477
25- 32 E8.3 --- ECS4.699 Effective collision strength for logTe=4.699
34- 41 E8.3 --- ECS4.845 Effective collision strength for logTe=4.845
43- 50 E8.3 --- ECS5.000 Effective collision strength for logTe=5.000
52- 59 E8.3 --- ECS5.477 Effective collision strength for logTe=5.477
61- 68 E8.3 --- ECS5.699 Effective collision strength for logTe=5.699
70- 77 E8.3 --- ECS5.845 Effective collision strength for logTe=5.845
79- 86 E8.3 --- ECS6.000 Effective collision strength for logTe=6.000
88- 95 E8.3 --- ECS6.301 Effective collision strength for logTe=6.301
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Acknowledgements:
Kanti Aggarwa, K.Aggarwal(at)qub.ac(uk)
(End) Patricia Vannier [CDS] 19-Aug-2008