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J/A+AS/123/575 IRON Project XXIII. Fe XXII excitation rate (Zhang+ 1997)
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Atomic data from the Iron Project. XXIII. Relativistic rate coefficients for
Fe XXII with inclusion of radiation damping.
Zhang H.L., Pradhan A.K.
<Astron. Astrophys. Suppl. Ser. 123, 575 (1997)>
=1997A&AS..123..575Z (SIMBAD/NED BibCode)
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ADC_Keywords: Atomic physics
Keywords: atomic data - Sun: flares - X-rays: general
Abstract:
New collision strengths have been calculated for 990 transitions among
45 fine structure n=2 and n=3 levels of Fe XXII. The relativistic
Breit-Pauli formulation of the R-matrix method was employed in the
close coupling approximation, with radiation damping of autoionizing
resonances included for the first time in the calculations of
excitation rate coefficients. It is found that, at low temperatures,
the relativistic effects considerably enhance rate coefficients for
the intercombination transitions, and the radiation damping effect
reduces those for a few transitions. It is also found that resonances
due to coupling with the n=3 levels significantly enhance rate
coefficients for the transitions to low-lying levels at intermediate
and high temperatures, and for the transitions to the n=2 high-lying
levels at all temperatures. It is expected that the new data,
tabulated at a wide range of temperatures, would lead to a revision of
the spectral diagnostics of Fe XXII in laboratory and astrophysical
sources, in particular the X-ray spectra observed from solar flares
and tokamaks.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
levels3 43 45 Levels for table3
levels4 43 45 Levels for table4
levels5 43 45 Levels for table5
table3 80 546 *Maxwellian-averaged collision strengths Upsilon
between the first 15 n=2 levels in Fe XXII
table4 80 1965 *Maxwellian-averaged collision strengths Upsilon
between the 15 n=2 levels & 30 n=3 levels in Fe XXII
table5 80 1898 *Maxwellian-averaged collision strengths Upsilon
between the 30 n=3 levels in Fe XXII
prog.f 75 36 Fortran code to read the data file ups
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Note on table3:
Structure of file:
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Records Format Explanations
------------------------------------------------------------------------------
1- 4 20A4 Title
5 3I5 Nuclear charge number Z, number of electrons
per ion N and the number of levels
6- 50 I5,5A5,I3,1PE11.4 Level index, configuration and term, total
angular momentum J, and the energy
(same as file levels3)
51 2I8 Number of transitions NTR and
number of temperatures
52- 65 8(2i4,2x) Transition keys ((i,j),i=1,j-1),j=2,N1)),
with i and j being the initial and the final
levels. N1 is the number (15) of n=2 levels
66 F8.0 Temperature T = 100 (z*z K) with z=Z-N=21
so that T = 44,100 (K)
67- 80 8(1PE9.2,1X) Upsilons for the corresponding transitions
specified in Record 52 - 65
81- 541 F8/8((1PE9.2,1X) Repeating the above for 31 more temperatures:
200.0 300.0 400.0 500.0 600.0 800.0
1000.0 1500.0 2000.0 2500.0 3000.0 3500.0
4000.0 5000.0 6000.0 7000.0 8000.0 9000.0
10000.0 12000.0 14000.0 16000.0 18000.0 20000.0
23000.0 26000.0 30000.0 35000.0 40000.0 45000.0
50000.0
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Note on table4:
Structure of file:
------------------------------------------------------------------------------
Records Format Explanations
------------------------------------------------------------------------------
1- 4 20A4 Title
5 3I5 Nuclear charge number Z, number of electrons
per ion N and the number of levels
6- 50 I5,5A5,I3,1PE11.4 Level index, configuration and term, total
angular momentum J, and the energy
(same as file levels4)
51 2I8 Number of transitions NTR and
Number of temperatures
52- 108 8(2i4,2x) Transition keys ((i,j),i=1,j-1),j=2,N1)),
with i and j being the initial and the final
levels. N1 is the number (15) of n=2 levels
109 F8.0 Temperature T = 100 (z*z K) with z=Z-N=21
so that T = 44,100 (K)
110- 166 8(1PE9.2,1X) Upsilons for the corresponding transitions
specified in Record 52 - 108
167-1964 F8/8((1PE9.2,1X) Repeating the above for 31 more temperatures:
200.0 300.0 400.0 500.0 600.0 800.0
1000.0 1500.0 2000.0 2500.0 3000.0 3500.0
4000.0 5000.0 6000.0 7000.0 8000.0 9000.0
10000.0 12000.0 14000.0 16000.0 18000.0 20000.0
23000.0 26000.0 30000.0 35000.0 40000.0 45000.0
50000.0
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Note on table5:
Structure of file:
------------------------------------------------------------------------------
Records Format Explanations
------------------------------------------------------------------------------
1- 4 20A4 Title
5 3I5 Nuclear charge number Z, number of electrons
per ion N and the number of levels
6- 50 I5,5A5,I3,1PE11.4 Level index, configuration and term, total
angular momentum J, and the energy
(same as file levels5)
51 2I8 Number of transitions NTR and
Number of temperatures
52- 106 8(2i4,2x) Transition keys ((i,j),i=1,j-1),j=2,N1)),
with i and j being the initial and the final
levels. N1 is the number (15) of n=2 levels
107 F8.0 Temperature T = 100 (z*z K) with z=Z-N=21
so that T = 44,100 (K)
108- 162 8(1PE9.2,1X) Upsilons for the corresponding transitions
specified in Record 52 - 106
163-189 F8/8((1PE9.2,1X) Repeating the above for 31 more temperatures:
200.0 300.0 400.0 500.0 600.0 800.0
1000.0 1500.0 2000.0 2500.0 3000.0 3500.0
4000.0 5000.0 6000.0 7000.0 8000.0 9000.0
10000.0 12000.0 14000.0 16000.0 18000.0 20000.0
23000.0 26000.0 30000.0 35000.0 40000.0 45000.0
50000.0
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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/126/373 : IRON Project XXVII Fe IV collision strengths
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 fine-structure transitions
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 levels4 levels5
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Bytes Format Units Label Explanations
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4- 5 I2 --- Index Level index
9- 19 A11 --- Conf Electronic configuration
21- 27 A7 --- Term Electronic term
30- 32 F3.1 --- J Total angular momentum
35- 42 F8.5 Ry E Theoretical energy
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Acknowledgements: Honglin Zhang <zhang@payne.mps.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
1998A&AS..127..545B : IRON Project XXV Fe XII 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-Nov-1996