J/A+A/441/831 Electron impact excitation of Ar XVII (Aggarwal+, 2005)
Electron impact excitation of Ar XVII.
Aggarwal K.M., Keenan F.P.
<Astron. Astrophys. 441, 831 (2005)>
=2005A&A...441..831A 2005A&A...441..831A
ADC_Keywords: Atomic physics
Keywords: atomic data - atomic processes
Abstract:
Energies for the lowest 49 levels among the 1s^2 and 1snl (n=2-5)
configurations of Ar XVII have been calculated using the GRASP
code of Dyall et al. (1989, Comput. Phys. Commun., 55, 424).
Additionally, radiative rates, oscillator strengths, and line
strengths are calculated for all electric dipole (E1), magnetic dipole
(M1), electric quadrupole (E2), and magnetic quadrupole (M2)
transitions among these levels. Furthermore, collision strengths have
also been calculated for all the 1176 transitions among the above 49
levels using the Dirac Atomic R-matrix Code (DARC) of Norrington &
Grant (2005, Comput. Phys. Commun., in prep.), over a wide energy
range up to 580Ryd. Resonances have been resolved in the threshold
region, and effective collision strengths have been obtained over a
wide temperature range up to log Te=7.2K. Comparisons are made with
the limited results available in the literature, and the accuracy of
the data is assessed. Our energy levels are estimated to be accurate
to better than 0.1%, whereas results for other parameters are probably
accurate to better than 20%.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 62 49 Target levels of Ar XVII and their threshold energies
table2.dat 75 720 Transition energies, radiative rates, oscillator
strengths and line strengths for electric dipole
(E1) and quadrupole (E2) transitions in Ar XVII
table3.dat 75 720 Transition energies, radiative rates, oscillator
strengths and line strengths for magnetic dipole
(M1) and quadrupole (M2) transitions in Ar XVII
table4.dat 27 82 Comparison of oscillator strengths for some
transitions of Ar XVII
table5.dat 86 1176 Collision strengths for transitions in Ar XVII
table6.dat 104 1176 Effective collision strengths for transitions in
Ar XVII
table7.dat 21 42 Comparison of effective collision strengths for
transitions among the lowest 7 levels of Ar XVII
table8.dat 59 16 Comparison of effective collision strengths for some
transitions of Ar XVII
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See also:
J/A+A/436/1141 : Radiative rates in Ar XIII, Ar XIV + Ar XV (Aggarwal+, 2005)
J/A+A/487/383 : Ar XVIII radiative and excitation rates (Aggarwal+, 2008)
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 Index number
4- 8 A5 --- Conf Configuration
10- 19 A10 --- Level Level
23- 31 F9.5 Ry Expt ? Theoretical threshold energy (1)
33- 42 F10.6 Ry CHIANTI CHIANTI threshold energy (2)
44- 53 F10.6 Ry GRASP1 GRASP threshold energy, present results from
from GRASP without Breit and QED effects.
54- 63 F10.6 Ry GRASP2 GRASP threshold energy, present results from
GRASP with Breit and QED effects
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Note (1): NIST (http://www.physics.nist/gov/PhysRefData)
Note (2): Energy levels of Sampson et al. (1983, At. Data Nucl. Data Tables,
29, 467) from chianti database (http://wwwsolar.nrl.navy.mil/chianti.html)
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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 i level
4- 5 I2 --- j j level
7- 15 E9.4 0.1nm DEij Transition energy
17- 25 E9.4 s-1 AjiE1 Radiative rates for electric dipole
(E1) transition
27- 35 E9.4 --- fijE1 Oscillator strength for electric dipole
(E1) transition
37- 45 E9.4 --- SE1 Line strength (in atomic units) for
electric dipole (E1) transition
47- 55 E9.4 s-1 AjiE2 Radiative rates for electric quadrupole
(E2) transition
57- 65 E9.4 --- fijE2 Oscillator strength for electric quadrupole
(E2) transition
67- 75 E9.4 --- SE2 Line strength (in atomic units) for
electric quadrupole (E2) transition
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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 i level
4- 5 I2 --- j j level
7- 15 E9.4 0.1nm DEij Transition energy
17- 25 E9.4 s-1 AjiM1 Radiative rates for magnetic dipole
(M1) transition
27- 35 E9.4 --- fijM1 Oscillator strength for magnetic dipole
(M1) transition
37- 45 E9.4 --- SM1 Line strength (in atomic units) for
magnetic dipole (M1) transition
47- 55 E9.4 s-1 AjiM2 Radiative rates for magnetic quadrupole
(M2) transition
57- 65 E9.4 --- fijM2 Oscillator strength for magnetic quadrupole
(M2) transition
67- 75 E9.4 --- SM2 Line strength (in atomic units) for
magnetic quadrupole (M2) transition
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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 i level
4- 5 I2 --- j j level
7- 14 E8.4 --- Chianti Chianti oscillator strength
16- 23 E8.4 --- Present Present oscillator strength
25- 27 F3.1 --- fL/fV Ratio of our f-values in the length and
velocity forms
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- i i level
4- 5 I2 --- j j level
7- 14 E8.4 --- CS300 Collision strengths for E=300Ryd
16- 23 E8.4 --- CS320 Collision strengths for E=320Ryd
25- 32 E8.4 --- CS340 Collision strengths for E=340Ryd
34- 41 E8.4 --- CS360 Collision strengths for E=360Ryd
43- 50 E8.4 --- CS380 Collision strengths for E=380Ryd
52- 59 E8.4 --- CS400 Collision strengths for E=400Ryd
61- 68 E8.4 --- CS450 Collision strengths for E=450Ryd
70- 77 E8.4 --- CS500 Collision strengths for E=500Ryd
79- 86 E8.4 --- CS550 Collision strengths for E=550Ryd
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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 i level
4- 5 I2 --- j j level
7- 14 E8.4 --- ECS5.2 Effective collision strengths for logTe=5.20K
16- 23 E8.4 --- ECS5.4 Effective collision strengths for logTe=5.40K
25- 32 E8.4 --- ECS5.6 Effective collision strengths for logTe=5.60K
34- 41 E8.4 --- ECS5.8 Effective collision strengths for logTe=5.80K
43- 50 E8.4 --- ECS6.0 Effective collision strengths for logTe=6.00K
52- 59 E8.4 --- ECS6.2 Effective collision strengths for logTe=6.20K
61- 68 E8.4 --- ECS6.4 Effective collision strengths for logTe=6.40K
70- 77 E8.4 --- ECS6.6 Effective collision strengths for logTe=6.60K
79- 86 E8.4 --- ECS6.8 Effective collision strengths for logTe=6.80K
88- 95 E8.4 --- ECS7.0 Effective collision strengths for logTe=7.00K
97-104 E8.4 --- ECS7.2 Effective collision strengths for logTe=7.20K
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- i i level
4- 5 I2 --- j j level
7- 13 E7.3 --- ECSZS Zhang & Sampson (1987ApJS...63..487Z 1987ApJS...63..487Z)
effective collision strengths (T=2.33E+6K)
15- 21 E7.3 --- ECS Present results Effective collision strengths
(T=1.17E+7K)
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Byte-by-byte Description of file: table8.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- i i level
4- 5 I2 --- j j level
7- 14 E8.4 --- ECS6.8 Present results Effective collision strengths
for logT=6.8K
16- 23 E8.4 --- ECS7.0 Present results Effective collision strengths
for logT=7.0K
25- 32 E8.4 --- ECS7.2 Present results Effective collision strengths
for logT=7.2K
34- 41 E8.4 --- ECSK6.8 ? Keenan et al. (1987, Phys. Scr., 35, 432)
effective collision strengths for logT=6.8K
43- 50 E8.4 --- ECSK7.0 ? Keenan et al. (1987, Phys. Scr., 35, 432)
effective collision strengths for logT=7.0K
52- 59 E8.4 --- ECSK7.2 ? Keenan et al. (1987, Phys. Scr., 35, 432)
effective collision strengths for logT=7.2K
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Acknowledgements: Kanti Aggarwal, K.Aggarwal(at)qub.ac.uk
(End) Patricia Vannier [CDS] 30-Jun-2005