J/A+AS/119/509 IRON Project. XVII. Radiative transition in Fe III (Nahar+, 1996)
Atomic data from the IRON Project. XVII. Radiative transition probability for
dipole allowed forbidden transitions in Fe III.
Nahar S.N., Pradhan A.K.
<Astron. Astrophys. Suppl. Ser. 119, 509 (1996)>
=1996A&AS..119..509N 1996A&AS..119..509N (SIMBAD/NED BibCode)
ADC_Keywords: Atomic physics
Keywords: atomic data - plasmas - ultraviolet: general - infrared: general -
optical
Description:
Table ls.dat contains all LS terms considered in this work and their
energy values with complete designation. Table aij.dat contains f-,
S-, and A-values of transitions, both in LS multiplet and in fine
structure. For the full designation of the terms in the lower table
check the top energy table. At the end of the lower table, a program
in Fortran77 is written which can read the tables and calculate
lifetime values from the A-values.
Files ls.dat and aij.dat present transitions in Fe III (obs-file) among
states that have been observed and the calculated energies were replaced
by the observed energies to improve the accuracy (explained in the Ref).
Files ls2.dat and aij2.dat (cal-file) contains transitions among the
rest of the calculated energy states and all the transition energies
are calculated ones. Hence the two files, one with observed energies
(obs-file) and one with calculated energies (cal-file) are complement
to each other with no common transitions.
The uncertainties of the transition probabilities in cat-file, are
expected to be higher than those in the obs-file as the observed
energies are more accurate in general than the calculated ones.
Total data:
Septets:
Number of bound energy terms = 54
Number of LS transitions = 40 (obs energies), 274 (cal energies)
Number of fine structure transitions = 354 (obs energies),
3448 (cal energies)
Quintets:
Number of bound energy terms = 190
Number of LS transitions = 423 (obs energies), 3435 (cal energies)
Number of fine structure transitions= 4756 (obs energies),
37042 (cal energies)
Triplets:
Number of bound energy terms = 359
Number of LS transitions = 712 (obs energies), 12885 (cal energies)
Number of fine structure transitions= 4451 (obs energies),
80013 (cal energies)
Singlets:
Number of bound energy terms = 202
Number of LS transitions = 233 (obs energies), 3831 (cal energies)
Number of fine structure transitions = 233 (obs energies),
3831 (cal energies)
Total no of LS multiplets using observed energies = 1408
Total no of fjj values with observed energies = 9794
Total no of LS multiplets using calculated energies = 20425
Total no of fjj values with calculated energies = 124334
Total number of f-values using observed and calculated transition
energies = 134,128
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
aij.dat 80 14027 *fif, s and aji values with observed energies
ls.dat 53 200 *LS terms associated with aij.dat file
aij2.dat 80 185617 *fif, s and aji values with calculated energies
ls2.dat 79 805 *LS terms associated with aij2.dat file
prog.f 80 143 FORTRAN program
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Note on ls.dat file:
The table below contains LS term energies of Fe III. The energies were
obtained from statistical average of the fine structure levels,
relative to the ground state. The fine structure energies were
provided by NIST: the reference is "Atomic Energy Levels of the
Iron-Period Elements: Potassium through Nickel," J. Sugar and
C. Corliss, J. Phys. Chem. Ref. Data 14, Suppl. 2 (1985).
The table also contains the new energy states observed by Ekberg
at Lund (J/A+AS/101/1)
We use only those states of Ekberg that are not found in the NIST
compilation. These states are denoted by "Ek" in the energy table
in the paper.
Column "E(Ry,abs)" represents absolute term energies where ionization
energy (-I.P.) has been added to the relative energies "E(Ry,rel)".
The negative sign for the absolute energies has been omitted for
convenience.
"SLpi" stands for the complete symmetry information of the term: 2S+1, L,
and parity.
"D" stands for the degeneracy notation chosen for each term and the same
notation has been used throughout the table for transition quantities.
The chosen notation supersedes the experimental ones.
Note on aij.dat file:
1. The units are specified in the title lines of the table except that
Ei and Ef of the transitional LS terms on the first line are absolute
values and are in Rydberg units.
2. Observed energies are used for all transitions in LS multiplets.
3. An * for the energies of the two transitional fs levels means that one of
the levels has not been observed. Hence the fs f- and a-values are obtained
from calculated energies.
4. An * below a transitional LS term indicates that its obs fine structure
set of energies is not complete.
5. An * below the arrow of a transition indicates that the calculated
transition was in reversed order.
6. An * on the left of a fine structure transition means that the low and the
high energy levels belong to the higher and lower LS terms respectively.
Note on ls2.dat:
A state with * represents incomplete fine structure set.
Each LS-term is preceded by an alphabetic notation to represent the
degeneracy of the state. The states of an even parity symmetry are assigned
with an ascending order and of an odd parity symmetry with a descending
order of alphabets. However, the order is not maintained in the calculated
energy states when observed energies do not match the order.
The states with valence electron represented by "0s" is an equivalent
electron state and the core configuration given is not correct.
"SLpi" stands for the complete symmetry information of the term: 2S+1, L,
and parity.
"D" stands for the degeneracy notation assigned for each term.
The same notation has been used throughout the table for transition
quantities. The assigned notation in this file may not necessarily match
those in the NIST table.
Note on aij2.dat:
1. The units are specified in the title lines of the table except that Ei and
Ef of the transitional LS terms on the first line are absolute values and
are in Rydberg units; negative sign omitted for convenience.
2. The calculated energy is replaced by the observed one if one transitional
state has been observed. The same degeneracy notation of states are
maintained in the two files, the earlier one and the present one.
3. The asterisks in the transitions do not have much meaning and should be
ignored.
4. The transitions sometime are not ordered in the sequence of initial states.
They have been rearranged due to the notation adapted for the observed
energy states.
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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 FeII collision strengths
J/A+A/293/967 : IRON Project VII FeII radiative transitions
J/A+AS/109/193 : IRON Project VIII Electron excitation of Ti-like ions
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 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
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/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: ls.dat
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Bytes Format Units Label Explanations
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1 A1 --- Mul. [1357] Multiplet 1=Singlet, 3=Triplet,
5=Quintet, 7=Septets
3- 18 A16 --- config Configuration
20 A1 --- n_SLpi Assigned degeneracy symbol
21- 23 A3 --- SLpi Symmetry: (2S+1), L, parity of the term
24 A1 --- note [*] State with * represents incomplete fs set
26 A1 --- D Degeneracy notation
31- 38 F8.6 Ry E(Ry,abs) Absolute energy
42- 49 F8.6 Ry E(Ry,rel) Relative energy
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Byte-by-byte Description of file: ls2.dat
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Bytes Format Units Label Explanations
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2- 16 A15 --- config Configuration
19 A1 --- D Degeneracy notation
20- 26 A7 --- SLpi Symmetry: (2S+1), L, parity of the term
30- 38 F9.6 Ry E(Ry,abs) Absolute energy
40- 47 F8.5 Ry E(Ry,rel) ? Relative energy
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Acknowledgements: Sultana Nahar
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 Bauer [CDS] 25-Mar-1996