J/MNRAS/391/1828FeIV energy levels & transition prob. (Fischer+, 2008)

Multiconfiguration Dirac-Hartree-Fock energy levels and transition probabilities for 3d^{5}in FeIV. Fischer C.F., Rubin R.H., Rodriguez M. <Mon. Not. R. Astron. Soc., 391, 1828-1837 (2008)> =2008MNRAS.391.1828F (SIMBAD/NED BibCode)ADC_Keywords: Atomic physicsKeywords: atomic data - atomic processesAbstract: Multiconfiguration Dirac-Hartree-Fock electric quadrupole (E2) and magnetic dipole (M1) transition probabilities are reported for transitions between levels of 3d^{5}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 3d^{5}levels tablea1.dat 72 465 E2 transition data and accuracy tablea2.dat 72 311 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 A_{ki}value 52- 60 E9.4 s-1 AkiU Calculated radiative transition rate A_{ki}value 62- 66 F5.2 --- dE Accuracy indicator deltaE (1) 68- 72 F5.2 --- dT ? Accuracy indicator deltaT (2)

Note (1): dE=(DeltaE(calc)/DeltaE(obs))-1Note (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 A_{ki}(E2)+A_{ki}(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

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