J/MNRAS/391/1828 FeIV energy levels & transition prob. (Fischer+, 2008)
Multiconfiguration Dirac-Hartree-Fock energy levels and transition probabilities
for 3d5 in FeIV.
Fischer C.F., Rubin R.H., Rodriguez M.
<Mon. Not. R. Astron. Soc., 391, 1828-1837 (2008)>
=2008MNRAS.391.1828F 2008MNRAS.391.1828F (SIMBAD/NED BibCode)
ADC_Keywords: Atomic physics
Keywords: atomic data - atomic processes
Abstract:
Multiconfiguration Dirac-Hartree-Fock electric quadrupole (E2) and
magnetic dipole (M1) transition probabilities are reported for
transitions between levels of 3d5 in [FeIV]. The accuracy of the ab
initio energy levels and the agreement in the length and velocity
forms of the line strength for the E2 transitions are used as
indicators of accuracy. The present E2 and M1 transition probabilities
are compared with earlier Breit-Pauli results and other theories. An
extensive set of transition probabilities with indicators of accuracy
are reported in tables A1 and A2. Recommended values of A(E2)+A(M1)
are listed in table A3.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 77 37 Computed energy levels, splitting, difference
from observed (ASD 2008) (computed - observed),
and composition of the 3d5 levels
tablea1.dat 72 465 E2 transition data and accuracy
tablea2.dat 66 311 M1 transition data and accuracy
tablea3.dat 51 465 Recommended values from MCDHF (G) and MCHF (B)
--------------------------------------------------------------------------------
See also:
J/A+AS/126/373 : IRON Project XXVII. Fe IV collision strengths (Zhang+ 1997)
J/A+A/437/345 : Fe IV radiative transition probabilities (Nahar+, 2005)
J/A+A/446/1185 : Electron collisions with Fe IV ions (McLaughlin+, 2006)
J/A+A/448/779 : IRON Project. LXI. Fe IV radiative transitions (Nahar+, 2006)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- Level Level index
4- 10 A7 --- LS LS term
12 A1 --- n_J [*] * for J value within a term that is not
in the observed order
13- 14 I2 --- 2J J value (multiplied by 2)
15- 16 A2 --- --- [/2]
19- 26 F8.1 cm-1 E Energy level
30- 34 F5.1 --- Split ? Splitting, separation between levels of a term
37- 42 F6.1 cm-1 O-C Energy difference, observed-computed (1)
45- 77 A33 --- Comp Composition (per cent)
--------------------------------------------------------------------------------
Note (1): Energy difference from observed (ASD 2008, NIST Atomic Spectra
Database (version 3.1.5), http://physics.nist.gov/asd3 (2008 July 9).
National Institute of Standards and Technology, Gaithersburg, MD)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea1.dat tablea2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
2- 3 I2 --- L Lower Level (index from table1.dat)
5- 6 I2 --- U Upper Level (index from table1.dat)
8- 16 F9.2 0.1nm lambda ? Wavelength
17 A1 --- n_lambda [I] I for +infinity
19- 27 E9.4 --- S Line strength
30- 38 E9.4 --- gf Weighted oscillator strength
41- 49 E9.4 s-1 AkiN Normalized radiative transition rate Aki value
52- 60 E9.4 s-1 AkiU Calculated radiative transition rate Aki value
62- 66 F5.2 --- dE Accuracy indicator δE (1)
68- 72 F5.2 --- dT ? Accuracy indicator δT (2)
--------------------------------------------------------------------------------
Note (1): dE=(DeltaE(calc)/DeltaE(obs))-1
Note (2): dT=[S(length)-S(velocity)]/max(S(length),S(velocity))
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
2- 3 I2 --- L Lower Level (index from table1.dat)
5- 6 I2 --- U Upper Level (index from table1.dat)
8- 16 F9.2 0.1nm lambda Wavelength in Vacuum
19- 27 E9.4 s-1 Aki(E2) ?=- E2 transition radiative transition rate
30- 38 E9.4 s-1 Aki(M1) ?=- M1 transition radiative transition rate
41- 49 E9.4 s-1 Aki Aki(E2)+Aki(M1) value
51 A1 --- Model [GB] G: best from MCDHF or
B: best from MCHF + Breit-Pauli
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 13-Apr-2009