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J/A+AS/126/373 IRON Project XXVII. Fe IV collision strengths (Zhang+ 1997)
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Atomic data from the Iron Project. XXVII. Electron impact excitation collision
strengths and rate coefficients for Fe IV
Zhang H.L., Pradhan A.K.
<Astron. Astrophys. Suppl. Ser. 126, 373 (1997)>
=1997A&AS..126..373Z (SIMBAD/NED BibCode)
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ADC_Keywords: Atomic physics
Keywords: atomic processes - planetary nebulae: general - H II regions
Abstract:
Collision strengths and maxwellian-averaged rate coefficients have
been calculated for 8771 non-vanishing transitions among 140 fine
structure levels, dominated by the configurations 3d^5^, 3d^4^4s, and
3d^4^4p in Fe IV. Collision strengths are calculated using the
R-matrix method with a 49 term close-coupling target expansion for
electron energies up to 15 rydbergs. Rate coefficients are tabulated
for a wide range of temperatures in which Fe IV is abundant in plasma
sources. A brief discussion of the calculations and sample results are
given. The present rates for Fe IV are expected to find applications
in spectral diagnostics of a variety of astrophysical sources.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
levels3 43 140 Levels for table3
table3 80 23203 *Maxwellian-averaged collision strengths
Upsilon(i,j) for the 8771 transitions between
the 140 levels at T=2000-500000K in Fe IV
prog.f 74 36 Fortran code to read the data file table3
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Note on table3:
Structure of file:
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Records Format Explanations
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1 - 4 20A4 Title
5 3I5 Nuclear charge number Z, number of electrons
per ion N and the number of levels
6 - 145 I5,5A4,2X,I3,1PE11.4 Level index, configuration and term, total
angular momentum J, and the energy
146 2I8 Number of transitions NTR and
number of temperatures NTEMP
147 - 1243 8(2i4,2x) Transition keys ((i,j),i=1,j-1),j=2,ntr)),
with i and j being the initial and the
final levels.
1244 F8.0 Temperature T = 2000 K
1245 - 2341 8(1PE9.2,1X) Upsilons for the corresponding transitions
specified in Record 147 - 1243.
2342 - 23203 F8/8((1PE9.2,1X) Repeating the above for 19 more temperatures:
4000, 6000, 8000, 10000, 12000, 15000,
17000, 20000, 25000, 30000, 40000, 50000,
60000, 70000, 85000, 100000, 200000, 300000,
500000
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See also:
J/A+AS/103/273 : IRON Project II IR collision strengths of C-like ions
J/A+A/283/319 : IRON Project III B-like ions
J/A+AS/108/1 : IRON Project V Collision strengths of O-like ions
J/A+A/293/953 : IRON Project VI Fe II collision strengths
J/A+A/293/967 : IRON Project VII Fe II radiative transitions
J/A+AS/109/193 : IRON Project VIII Electron excitation of Ti-like ions
J/A+AS/119/509 : IRON Project XVII Radiative transition in Fe III
J/A+AS/119/523 : IRON Project XVIII Electron impact for Fe III
J/A+AS/120/361 : IRON Project XIX Fe II radiative transitions
J/A+AS/123/159 : IRON Project XXII C and O radiative rates
J/A+AS/123/575 : IRON Project XXIII Fe XXII excitation rate coefficients
J/A+AS/131/499 : IRON Project XXIX Boron isoelectronic sequence
J/A+AS/131/153 : IRON Project XXXI Fe XII electron excitation
J/A+AS/135/347 : IRON Project XXXV Fe XXIV & Fe XXV oscillator strengths
J/A+AS/136/395 : IRON Project XXXVII Fe VI collision strengths
J/A+AS/137/165 : IRON Project XXXVIII Fe XV electron excitation
J/A+AS/143/483 : IRON Project XLII Fe XXI electron impact excitation
J/A+AS/144/141 : IRON Project XLIII Fe V transition probabilities
Byte-by-byte Description of file: levels3
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Bytes Format Units Label Explanations
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3- 5 I3 --- Index Level index
9- 19 A11 --- Conf Electronic configuration
23- 25 A3 --- Term Electronic term
29- 30 I2 --- J Total angular momentum
33- 42 E10.4 Ry E Theoretical energy
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Acknowledgements: Honglin Zhang <zhang@astronomy.ohio-state.edu>
References:
1993A&A...279..298H : IRON Project I Goal and methods
1994A&AS..107...29S : IRON Project IV Electron excitation of F-like ions
1995A&AS..110..209P : IRON Project IX Electron excitation of Cl-like ion
1995A&AS..111..347G : IRON Project X Si- & S-like ions IR collision strengths
1996A&AS..115..151S : IRON Project XI Ar VI, K VII and Ca VIII fine-structure
1995A&AS..114..367B : IRON Project XII V-like ions electron excitation
1996A&AS..115..551B : IRON Project XIII Ni II & Fe II electron excitation
1996A&A...309..677S : IRON Project XIV Fe XIV fine-structure transition
1996A&AS..118..157K : IRON Project XV Electron excitation of He II & Fe XXVI
1996A&AS..119..105B : IRON Project XVI Fe V oscillator strengths
1997A&AS..122..167B : IRON Project XX Fe I oscillator strengths
1997A&AS..122..177P : IRON Project XXI Fe I fine-structure transition
1997A&AS..126..105B : IRON Project XXIV Fe XXIV electron excitation
1997A&AS..126..365B : IRON Project XXVI Fe IV oscillator strengths
1998A&AS..129..161B : IRON Project XXVIII F-like ions fine-structure trans.
1999A&AS..134..369S : IRON Project XXX P III, S IV & Cl V collision data
1998A&AS..133..245G : IRON Project XXXII Ar III effective collision strength
1999A&AS..135..159M : IRON Project XXXIII Carbon radiative rates
1999A&AS..136..385E : IRON Project XXXIV Fe XVI electron impact excitation
1999A&AS..137..175C : IRON Project XXXVI Fe XXIII electron excitation
1999A&AS..137..529B : IRON Project XXXIX Ni II oscillator strengths
2000A&AS..141..285S : IRON Project XL Fe XIV electron excitation
2000A&AS..142..313B : IRON Project XLI Fe VII electron excitation
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(End) Patricia Bauer [CDS] 12-Sep-1997