J/A+A/408/789 Iron Project. LIII. Fe XVII (Nahar+, 2003)
Atomic data from the Iron Project.
LIII. Relativistic allowed and forbidden transition probabilities for FeXVII.
Nahar S.N., Eissner W., Chen G.X., Pradhan A.K.
<Astron. Astrophys. 408, 789 (2003)>
=2003A&A...408..789N 2003A&A...408..789N
ADC_Keywords: Atomic physics
Keywords: atomic data - radiation mechanisms: general - X-ray: general
Abstract:
An extensive set of fine structure levels and corresponding transition
probabilities for allowed and forbidden transitions in Fe XVII is
presented. A total of 490 bound energy levels of Fe XVII of total
angular momenta 0≤J≤7 of even and odd parities with 2≤n≤10,
0≤l≤8, 0≤L≤8, and singlet and triplet multiplicities, are
obtained. They translate to over 2.6x104 allowed (E1) transitions
that are of dipole and intercombination type, and 2312 forbidden
transitions that include electric quadrupole (E2), magnetic dipole
(M1), electric octopole (E3), and magnetic quadrupole (M2) type
representing the most detailed calculations to date for the ion.
Oscillator strengths f, line strengths S, and coefficients A of
spontaneous emission for the E1 type transitions are obtained in the
relativistic Breit-Pauli R-matrix approximation. A-values for the
forbidden transitions are obtained from atomic structure calculations
using codes SUPERSTRUCTURE and GRASP. The energy levels are identified
in spectroscopic notation with the help of a newly developed level
identification algorithm. Nearly all 52 spectroscopically observed
levels have been identified, their binding energies agreeing within 1%
with our calculation. Computed transition probabilities are compared
with other calculations and measurement. The effect of 2-body magnetic
terms and other interactions is discussed. The present data set
enhances by more than an order of magnitude the heretofore available
data for transition probabilities of Fe XVII.
Erratum:
A bug was detected and corrected in early 2007 in one of the stages
called RECUPD (Storey, Berrington, Werner 2007, private Iron Project
communications) of the Breit-Pauli R-matrix (BPRM) codes of the Iron
Project. It was related to the the phase factor of dipole matrix
elements of the Iron Project (Berrington et al., 1995, Comput. Phys.
Commun. 92, 290) and affected certain transition probabilities. The
calculations for ions have been repeated for corrected results in
order to replace the earlier results. (06-Aug-2009).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
fe17.en.fs.user 77 1332 Original table2
table2a.txt 75 664 *Fine structure energy levels of the ion, with
spectroscopic designation, ordered in energy
and grouped as compoments of LS terms
table2b.dat 69 454 Fine structure energy levels of the ion,
with spectroscopic designation, ordered in
Jπ and energy
table2c.dat 36 60 Fine structure levels of the core/target
included in the eigenfunction expansion
of ion
fe17.f.fs.user 79 21510 Original table4
table4a.dat 79 454 Fine structure levels
table4b.dat 94 20951 *Table of fine structure transitions
fe17.f.exp.user 80 790 Original table5
table5.dat 80 447 Table of oscillator strengths
fe17.lifetime.user 79 479 Original lifetime table
lifetime.dat 72 453 Lifetimes of fine structure levels using
allowed transitions only
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Note on table2a.txt: Total number of levels = 454
Nlv=Number of levels expected
Nlv(c)=Number of levels obtained
Nlv=Nlv(c) -> set complete
For Equivalent electron levels:
(i) no EQN (effective qn)
(ii) no check of set completeness
First lines:
Configuration J E(Ry) EQN LS terms
Eqv electron/unidentified levels, parity: e
2s22p6 0 -9.29251E+01 1 S e
Nlv(c)= 1 : set complete
Nlv= 3, 3Lo: P ( 2 1 0 )
2s22p5 (2Po) 3/2 3s 2 -3.95034E+01 2.70 3 P o
2s22p5 (2Po) 3/2 3s 1 -3.93670E+01 2.71 3 P o
2s22p5 (2Po) 1/2 3s 0 -3.85595E+01 2.70 3 P o
Nlv(c)= 3 : set complete
Nlv= 1, 1Lo: P ( 1 )
2s22p5 (2Po) 1/2 3s 1 -3.84694E+01 2.71 1 P o
Nlv(c)= 1 : set complete
Nlv= 7, 3Le: S ( 1 ) P ( 2 1 0 ) D ( 3 2 1 )
Note on table4b.dat: Sets of transitions are given for pairs of symmetries
Jpi - J'pi'.
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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/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/437/345 : IRON Project LIX Fe IV transition probabilities
J/A+A/448/779 : IRON Project LXI Fe IV radiative transitions
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: table2b.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Nlv Total number of symmetry Jπ (1)
4 I1 --- J [0,8] Total angular momentum
6 A1 --- P [oe] Parity (o: odd, e: even)
9- 10 I2 --- iiii [1,45] Level position
12- 17 A6 --- Ct T configuration (2)
23- 25 A3 --- SLpit T core level
28- 30 A3 --- Jt Total angular momentum value at t (2)
32- 34 A3 --- nl Principal and orbital quantum numbers of
the outer electron
39 I1 --- --- Total angular momentum, J
43- 54 E12.5 Ry E Energy
56- 60 F5.2 --- EQN ? Effective Quantum Number (3)
63- 69 A7 --- Terms Possible LS terms of the energy level
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Note (1): Z = 26, No. of core electrons = 9,
Number of fine structure levels:
---------------------------------
J pi Nlv(c)
---------------------------------
0 0 18
0 1 17
2 0 40
2 1 41
4 0 45
4 1 45
6 0 39
6 1 40
8 0 32
8 1 33
10 0 21
10 1 26
12 0 15
12 1 16
14 0 9
14 1 9
16 0 4
16 1 4
---------------------------------
Total number of levels = 454
Note (2): T(config SLpi Jt): T -> target (core) of the level
Note (3): No EQN is assigned for Equivalent electron levels
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Byte-by-byte Description of file: table2c.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Level Level
4- 11 A8 --- Config Configuration
14- 16 A3 --- SLp SLp term
20- 22 A3 --- J Total angular momentum
26- 36 E11.6 Ry E Energy
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Byte-by-byte Description of file: table4a.dat
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Bytes Format Units Label Explanations
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3- 5 I3 --- i [1,454] Level index
8 I1 --- J J level
9- 10 A2 --- --- [.0]
12 A1 --- P [oe] Parity
15- 17 I3 --- iiii Level position
22- 33 E12.7 Ry E Energy
36- 52 A17 --- Config Configuration
55- 61 A7 --- LS LS term (1)
73- 79 I7 --- jjpiiii Energy level ids (2)
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Note (1): There may be more than one possible LS term for some j-levels.
Simple assumption: higher L -> lower energy
Note (2): Energy levels with ids: jjpiiii, where
jj=2 x total angular momentum j, p=parity (e=0, o=1),
iii=level position
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Byte-by-byte Description of file: table4b.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- gi [1/17] Initial level 2J+1 value
4 I1 --- Pi [0/1] Initial level parity
6- 7 I2 --- gf [2/17] Final level 2J'+1 value
9 I1 --- Pf [0/1] Final level parity
11- 12 I2 --- Ni Number of bound levels of symmetry i
14- 15 I2 --- Nf Number of bound levels of symmetry j
17- 20 I4 --- NN NN=NixNj
22- 23 I2 --- i [1,45] Level of symmetry i
25- 26 I2 --- j [1,45] Level of symmetry j
28- 37 F10.2 0.1nm wl Wavelength (Angstroems)
39- 49 E11.6 Ry Ei Initial energy
51- 61 E11.6 Ry Ef Final energy
63- 72 E10.5 --- fL Oscillator strength value (1)
75- 83 E9.4 --- S Line Strength (atomic units)
86- 94 E9.4 s-1 Aji Transition probability
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Note (1): If a f-value is negative. the lower level is i (absorption) and
if it is positive, the lower level is j (emission).
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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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2- 9 A8 --- Ci Initial configuration (1)
14 A1 --- --- [-]
15- 22 A8 --- Cj Final configuration
27- 29 A3 --- SiLiPi Initial core level
31- 33 A3 --- SjLjPj Final core level
35- 36 I2 --- Ji Initial total angular momentum value
38- 39 I2 --- Ii ? Energy level index of Ji
(no value when Ci = LS)
41- 42 I2 --- Jf Final total angular momentum value
44- 45 I2 ---- If ? Energy level index of Jf
(no value when Ci = LS)
47- 53 F7.4 Ry Ei Initial energy
55- 61 F7.4 Ry Ef Final energy
63- 71 E9.3 --- f Oscillator strength
73- 80 E8.2 s-1 A Transition probability
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Note (1): nz = 26, No. of core electrons = 9, No of transitions = 342
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Byte-by-byte Description of file: lifetime.dat
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Bytes Format Units Label Explanations
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2- 4 I3 --- Level [1,453] Level number
6- 33 A28 --- Conf Configuration
34 I1 --- J [0,8] Total angular momentum
35- 36 A2 --- --- [.0]
39- 40 I2 --- Ij [1,45] Final level
42- 52 E11.6 Ry E Energy
55- 63 E9.4 s Lifetime ? Lifetime
64 A1 --- n_Lifetime [i] i for infinity
70- 72 I3 --- NTrans Number of transitions
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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
History:
* 20-Oct-2003: First version
* 06-Aug-2009: All files corrected (from author)
(End) Patricia Vannier [CDS] 06-Aug-2009