J/A+A/448/779 IRON Project. LXI. Fe IV radiative transitions (Nahar+, 2006)
Atomic data from the Iron Project.
LXI. Radiative E1, E2, E3, and M1 transition probabilities for Fe IV.
Nahar S.N.
<Astron. Astrophys. 448, 779 (2006)>
=2006A&A...448..779N 2006A&A...448..779N (SIMBAD/NED BibCode)
ADC_Keywords: Atomic physics
Keywords: atomic data - line: formation - radiation mechanisms: general -
atomic processes
Abstract:
Radiative decay rates (A) and line strengths (S) are presented for a
large number of electric dipole allowed (E1) and forbidden electric
quadrupole (E2), octupole (E3) and magnetic dipole (M1) transitions in
Fe IV. The ion is amongst the most complex iron ions and exhibits
effects of strong electron correlation. It has closely spaced fine
structure levels from seven configurations: 3s23p63d5,
3s23p63d44s, 3s23p63d44p, 3s23p63d44d,
3s23p63d34s4p, 3s23p63d34s4d, 3s23p53d6 before an
energy gap could be noted. Atomic parameters are presented for
multipole radiative transitions among the 1275 fine structure levels
dominated by these seven configurations. A total of approximately
173000 transitions of type E1, E2, E3 and M1 are presented.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 80 1275 Fine Structure energies employed in the
transition probabilities for Fe IV
table2a.dat 80 14145 *Dipole allowed E1d fine structure transitions
table2b.dat 80 30691 *Fine structure E1i intercombination transitions
table2c.dat 75 39423 *Forbidden octu E3 and quadrupole M2 transitions
table2d.dat 75 54019 *Forbidden quadrupole E2 and dipole M1 transitions
efbpss.fe4.user 80 139965 Original file for all tables
lifetmbp.f 77 228 Fortran code for efbpss.fe4.user file
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Note on table2*.dat: data in Breit-Pauli approximation.
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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/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
J/A+AS/147/111 : IRON Project XLIV Fe VI trans. prob. & line ratio
J/A+AS/147/253 : IRON Project XLV Ar XIII, Fe XXI trans. probabilities
J/A+A/365/268 : IRON Project XLVII Ni III electron impact excitation
J/A+A/372/1078 : IRON Project XLIX Fe XX electron impact excitation
J/A+A/372/1083 : IRON Project L Fe XIX electron impact excitation
J/A+A/394/753 : IRON Project LI Fe IX electron impact excitation
J/A+A/408/789 : IRON Project LIII Fe XVII transition probabilities
J/A+A/413/779 : IRON Project LIV Fe XX transition probabilities
J/A+A/420/763 : IRON Project LV Ni II electron impact excitation
J/A+A/430/331 : IRON Project LVI NEVER ARRIVED !!!!!!!
J/A+A/437/345 : IRON Project LIX Fe IV transition probabilities
J/A+A/457/721 : IRON Project LXII Fe XVIII allowed and forbidden trans.
J/A+A/466/763 : IRON Project LXIII Fe19+ electron impact excitation
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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2- 5 I4 --- ie [1,1275] Fine structure level number
8- 10 A3 --- SLp SLp term
11 A1 --- --- [(]
13 I1 --- Conf Configuration number code (G1)
14 A1 --- --- [)]
17- 18 I2 --- 2J 2J value
23- 30 F8.1 cm k k value
32- 41 E10.5 Ry Ecal Calculated energy
43- 52 A10 --- cfg Configuration
58 I1 --- A1 [1/3]?
60- 63 I4 --- symm Encoded symmetry
65- 74 E10.5 Ry Eobs Observed Energy
77- 80 F4.1 % df Percent difference between calculated and
observed energies
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Byte-by-byte Description of file: table2[ab].dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Ni [1,608] Initial level number
5- 7 I3 --- Nj [1,645] Final level number
9- 11 A3 --- Ti Initial LS term
13 I1 --- Ci Initial configuration number (G1)
15- 17 A3 --- Tj Final LS term
19 I1 --- Cj Final configuration number (G1)
21- 22 I2 --- gi Initial statistical weight factor of the level
24- 25 I2 --- gj Final statistical weight factor of the level
29- 38 F10.2 0.1nm Eij Transition energy
40- 43 F4.2 Ry Ei Initial energy
48- 51 F4.2 Ry Ej Final energy
53- 60 E8.3 --- fij Oscillator strength
63- 71 E9.4 --- S Line strength
73- 80 E8.3 s-1 aji Einstein's A-coefficients (1)
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Note (1): Number of non-zero E1 transitions = 44836
Number of dipole transitions, E1d = 14145 (table2a)
Number of intercombination transitions, E1i = 30691 (table2b)
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Byte-by-byte Description of file: table2[cd].dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Ni [1,809] Initial level number
5- 7 I3 --- Nj [1,812] Final level number
9- 13 A5 --- SLpCi Initial core level
15- 19 A5 --- SLpCj Final core level
21- 22 I2 --- gi Initial statistical weight factor of the level
24- 25 I2 --- gj Final statistical weight factor of the level
28- 38 F11.2 0.1nm wl Wavelength in vacuum
40- 47 E8.3 --- SE E3 (table2c) or E2 (table2d) line strength (1)
49- 56 E8.3 s-1 AE Forbidden E3 (table2c) or E2 (table2d)
transition probability
59- 66 E8.3 --- SM M2 (table2c) or M1 (table2d) line strength (1)
68- 75 E8.3 s-1 AM Forbidden M2 (table2c) or M1 (table2d)
transition probability
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Note (1):
Number of transitions: E3 = 39423, M2 = 0, Total E3+M2 = 39423
Total number of lines of M2/E3 transitions = 39423
Number of transitions: E2 = 53201, M1 = 35667, Total E2+M1 = 88868
Total number of transitions lines (including non-spectroscopic) = 54019
NT = total number of forbidden (E2,M1,E3,M2) transitions = 88868 + 39423
Net allowed (E1) and forbidden (E2,M1,E3,M2) transitions = 44836 + 88868
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Global notes:
Note (G1): Configuration number codes as follows:
1 = 3s2 3p6 3d5
2 = 3s2 3p6 3d4 4s
3 = 3s2 3p6 3d4 4p
4 = 3s2 3p6 3d4 4d
5 = 3s2 3p6 3d3 4s4p
6 = 3s2 3p5 3d6
7 = 3s2 3p6 3d3 4s4d
level 22 = 2De(J2= 5), cnf = 1 has the largest % difference.
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Acknowledgements: Sultana Nahar, nahar(at)astronomy.ohio-state.edu
References:
1993A&A...279..298H 1993A&A...279..298H : IRON Project I Goal and methods
1994A&AS..107...29S 1994A&AS..107...29S : IRON Project IV Electron excitation of F-like ions
1995A&AS..110..209P 1995A&AS..110..209P : IRON Project IX Electron excitation of Cl-like ion
1995A&AS..111..347G 1995A&AS..111..347G : IRON Project X Si- & S-like ions IR coll. strengths
1996A&AS..115..151S 1996A&AS..115..151S : IRON Project XI Ar VI, K VII & CaVIII fine-structure
1995A&AS..114..367B 1995A&AS..114..367B : IRON Project XII V-like ions electron excitation
1996A&AS..115..551B 1996A&AS..115..551B : IRON Project XIII Ni II & Fe II electron excitation
1996A&A...309..677S 1996A&A...309..677S : IRON Project XIV Fe XIV fine-structure transition
1996A&AS..118..157K 1996A&AS..118..157K : IRON Project XV He II & Fe XXVI Electron excitation
1996A&AS..119..105B 1996A&AS..119..105B : IRON Project XVI Fe V oscillator strengths
1997A&AS..122..167B 1997A&AS..122..167B : IRON Project XX Fe I oscillator strengths
1997A&AS..122..177P 1997A&AS..122..177P : IRON Project XXI Fe I fine-structure transition
1997A&AS..126..105B 1997A&AS..126..105B : IRON Project XXIV Fe XXIV electron excitation
1998A&AS..127..545B 1998A&AS..127..545B : IRON Project XXV Fe XII electron excitation
1997A&AS..126..365B 1997A&AS..126..365B : IRON Project XXVI Fe IV oscillator strengths
1998A&AS..129..161B 1998A&AS..129..161B : IRON Project XXVIII F-like ions fine-structure trans.
1999A&AS..134..369S 1999A&AS..134..369S : IRON Project XXX P III, S IV & Cl V collision data
1998A&AS..133..245G 1998A&AS..133..245G : IRON Project XXXII Ar III effective collision strength
1999A&AS..135..159M 1999A&AS..135..159M : IRON Project XXXIII Carbon radiative rates
1999A&AS..136..385E 1999A&AS..136..385E : IRON Project XXXIV Fe XVI electron impact excitation
1999A&AS..137..175C 1999A&AS..137..175C : IRON Project XXXVI Fe XXIII electron excitation
1999A&AS..137..529B 1999A&AS..137..529B : IRON Project XXXIX Ni II oscillator strengths
2000A&AS..141..285S 2000A&AS..141..285S : IRON Project XL Fe XIV electron excitation
2000A&AS..142..313B 2000A&AS..142..313B : IRON Project XLI Fe VII electron excitation
2001A&A...365..258P 2001A&A...365..258P : IRON Project XLVI Fe X electron excitation
2003A&A...401.1177C 2003A&A...401.1177C : IRON Project LII Ni24 electron excitation
2005A&A...436.1123M 2005A&A...436.1123M : IRON Project LVII Ni IV radiative transition rates
2005A&A...433..717S 2005A&A...433..717S : IRON Project LVIII Fe XII electron impact excitation
2006A&A...446..361W 2006A&A...446..361W : IRON Project LX Fe17+ electron impact excitation
(End) Patricia Vannier [CDS] 16-Dec-2005