J/ApJ/850/147 Effective collision strengths for OIII transitions (Tayal+, 2017)
Transition and electron impact excitation collision rates for OIII.
Tayal S.S., Zatsarinny O.
<Astrophys. J., 850, 147 (2017)>
=2017ApJ...850..147T 2017ApJ...850..147T
ADC_Keywords: Atomic physics
Keywords: atomic data; atomic processes; H II regions; line: formation;
scattering
Abstract:
Transition probabilities, electron excitation collision strengths, and
rate coefficients for a large number of OIII lines over a broad
wavelength range, from the infrared to ultraviolet, have been
reported. The collision strengths have been calculated in the
close-coupling approximation using the B-spline Breit-Pauli R-matrix
method. The multiconfiguration Hartree-Fock method in combination with
B-spline expansions is employed for an accurate representation of the
target wave functions. The close-coupling expansion contains 202 O2+
fine-structure levels of the 2s22p2, 2s2p3, 2p4, 2s22p3s,
3p, 3d, 4s, 4p, 4d, 4f, 5s, and 2s2p33s, 3p, 3d configurations. The
effective collision strengths are obtained by averaging electron
excitation collision strengths over a Maxwellian distribution of
velocities at electron temperatures ranging from 100 to 100000K. The
calculated effective collision strengths have been reported for the
20302 transitions between all 202 fine-structure levels. There is an
overall good agreement with the recent R-matrix calculations by
Storey+ (2014, VI/141) for the transitions between all levels of the
ground 2s22p2 configuration, but significant discrepancies have
been found with Palay et al. for transitions to the 2s22p2 1S0
level. Line intensity ratios between the optical lines arising from
the 2s22p2 3P0,1,2 - 1D2 transitions have been compared
with other calculations and observations from the photoionized gaseous
nebulae, and good agreement is found. The present calculations provide
the most complete and accurate data sets, which should allow a more
detailed treatment of the available measured spectra from different
ground and space observatories.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 103 202 Excitation level energies (eV) and lifetimes (s)
for O2+
table4.dat 52 28033 Line strengths, oscillator strengths, and
transition probabilities
table7.dat 97 20301 Effective collision strengths for fine-structure
transitions in OIII
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See also:
VI/141 : Nebular [OIII] collision strengths - SSB (Storey+, 2014)
VI/144 : Nebular [OIII] collision strengths - SS3 (Storey+, 2015)
J/A+AS/103/273 : IRON Project II. C-like ions (Lennon+ 1994)
J/A+AS/123/159 : IRON Project. XXII. C and O radiative rates (Galavis+ 1997)
J/A+AS/137/157 : O III recombination coefficients (Kisielius+, 1999)
J/ApJS/123/311 : Excitation rate coefficients for O III (Aggarwal+, 1999)
J/ApJ/743/206 : Effective collision strengths of FeVIII (Tayal+, 2011)
J/ApJ/752/148 : κ-distributed electrons & OIII line (Nicholls+, 2012)
J/ApJ/788/24 : Collision strengths for transitions in Fe VII (Tayal+, 2014)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- Ind [1/202] Index number
5- 33 A29 --- Conf Configuration
35- 53 A19 --- LSJ LSJπ levels
55- 60 F6.3 --- Level [0/56.8]? Experimental energy level from NIST
62- 67 F6.3 --- Calc [0/63.8] Present calculation level
69- 74 F6.3 --- Diffb [-0.09/0.08]? Difference between the present
calculation and the experiment
76- 81 F6.3 --- Diffc [-0.1/0.7]? Difference between the AUTOSTRUCTURE
calculation of Storey+ (2014, VI/141) and
the experiment
83- 87 F5.3 --- Diffd [0/0.2]? Difference between the MCHF calculation
of Froese Fischer+ (2009ApJ...703..500F 2009ApJ...703..500F) and
the experiment
89- 94 F6.3 --- Diffe [-0.04/0.09]? Difference between the MCDHF
calculation of
Jonsson & Bieron (2010JPhB...43g4023J 2010JPhB...43g4023J) and
the experiment
96-103 E8.3 s Lifetime [4.6e-11/39700]? Lifetime
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Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 A2 --- Type Transition type
4- 6 I3 --- i [1/201] The i level
8- 10 I3 --- k [2/202] The k level
12- 25 F14.2 0.1nm Wave [194.5/11390993408] Wavelength; Angstroms
27- 34 E8.2 --- S [1.7e-18/4340] Line strength
36- 43 E8.2 --- fik [3.3e-33/0.9] Oscillator strength
45- 52 E8.2 s-1 Aki [3.2e-37/20100000000] Transition probability
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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- 3 I3 --- i [1/201] The i level
5- 7 I3 --- k [2/202] The k level
9- 16 E8.2 --- CS-0.1 [0/266] Effective collision strength at 0.1E+3K
18- 25 E8.2 --- CS-0.5 [0/310] Effective collision strength at 0.5E+3K
27- 34 E8.2 --- CS-1.0 [0/319] Effective collision strength at 1.0E+3K
36- 43 E8.2 --- CS-5.0 [0/336] Effective collision strength at 5.0E+3K
45- 52 E8.2 --- CS-10.0 [0/372] Effective collision strength at 10.0E+3K
54- 61 E8.2 --- CS-20.0 [0/427] Effective collision strength at 20.0E+3K
63- 70 E8.2 --- CS-40.0 [0/504] Effective collision strength at 40.0E+3K
72- 79 E8.2 --- CS-60.0 [0/556] Effective collision strength at 60.0E+3K
81- 88 E8.2 --- CS-80.0 [0/599] Effective collision strength at 80.0E+3K
90- 97 E8.2 --- CS-100.0 [0/636] Effective collision strength at 100.0E+3K
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 02-Jul-2018