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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
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:
FileName Lrecl Records Explanations
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
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'.
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
Bytes Format Units Label Explanations
1- 2 I2 --- Nlv Total number of symmetry Jpi (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
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
Byte-by-byte Description of file: table2c.dat
Bytes Format Units Label Explanations
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
Byte-by-byte Description of file: table4a.dat
Bytes Format Units Label Explanations
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)
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
Byte-by-byte Description of file: table4b.dat
Bytes Format Units Label Explanations
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
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).
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
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
Note (1): nz = 26, No. of core electrons = 9, No of transitions = 342
Byte-by-byte Description of file: lifetime.dat
Bytes Format Units Label Explanations
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
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 coll. strengths 1996A&AS..115..151S : IRON Project XI Ar VI, K VII & CaVIII 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 He II & Fe XXVI Electron excitation 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 2001A&A...365..258P : IRON Project XLVI Fe X electron excitation 2003A&A...401.1177C : IRON Project LII Ni24 electron excitation 2005A&A...436.1123M : IRON Project LVII Ni IV radiative transition rates 2005A&A...433..717S : IRON Project LVIII Fe XII electron impact excitation 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
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