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J/A+A/370/1071      Fe XII UV line intensity ratios          (Binello+, 2001)

A comparison between theoretical and solar Fe XII UV line intensity ratios. Binello A.M., Landi E., Mason H.E., Storey P.J., Brosius J.W. <Astron. Astrophys. 370, 1071 (2001)> =2001A&A...370.1071B
ADC_Keywords: Atomic physics ; Spectra, ultraviolet ; Sun Keywords: Sun - atomic data - UV spectrum - plasma diagnostics Abstract: A new set of radiative and electron collisional data for Fe XII was presented in two earlier papers. In the present work, we derive level populations and theoretical line intensities for a range of plasma densities and temperatures. Observations of Fe XII lines obtained with the Solar EUV Rocket Telescope and Spectrograph are analysed both as a check on the quality of the new atomic data and to determine the electron density in active regions and the quiet Sun. The discrepancy between the electron density values determined from Fe XII line intensity ratios and those obtained from other ions is investigated. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 48 35 Spontaneous transition probabilities for all electric dipole fine structure transitions between the ground 3s2 3p3 and the first exited 3s 3p4 configurations in Fe XII. table3.dat 50 97 Spontaneous transition probabilities for all electric dipole fine structure transitions between the ground 3s2 3p3 and the second excited configurations in Fe XII tables.tex 94 483 LaTeX version of the tables
See also: J/A+AS/125/149 : CHIANTI - An Atomic Database For Emission Lines I. (Dere+ 1997) http://wwwsolar.nrl.navy.mil/chianti.html : CHIANTI homepage Byte-by-byte Description of file: table2.dat table3.dat
Bytes Format Units Label Explanations
1- 28 A28 --- Trans Transition 29 A1 --- n_Trans [a] Note on Trans (1) 31- 36 F6.2 0.1nm lambda Wavelength (2) 37 A1 --- n_lambda [*] *: Wavelengths calculated from theoretical energy levels (2) 39- 47 E9.3 s-1 A A coefficient
Note (1): a: A correction, due to the M2 component, has been added to the E1 transition probabilities. Note (2): Wavelengths are taken from the CHIANTI database (Dere et al. (1997, Cat. J/A+AS/125/149), Landi et al., 1999A&AS..135..339L). An asterisk indicates wavelength calculated from theoretical energy levels, as no experimental energy is available.
Table 4: Spontaneous transition probabilities for the 10 optically forbidden fine structure transitions within the ground 3s2 3p^3 configuration of Fe XII --------------------------------------------------------------------- Transition Wavelength Transition A (0.1nm) Type (s-1) --------------------------------------------------------------------- 2Do3/2-4So3/2 2406.45 M1 4.419E+1 2Do5/2-4So3/2 2169.76 M1 1.826E+0 2Po1/2-4So3/2 1349.38 M1 1.665E+2 2Po3/2-4So3/2 1242.01 M1 3.214E+2 2Do5/2-2Do3/2 22060.45 M1 8.945E-1 2Po1/2-2Do3/2 3071.91 M1 6.427E+1 2Po3/2-2Do3/2 2566.74 M1 1.799E+2 2Po1/2-2Do5/2 3568.88 E2 2.971E-1 2Po3/2-2Do5/2 2904.70 M1 7.277E+1 2Po3/2-2Po1/2 15607.93 M1 2.069E+0 --------------------------------------------------------------------- Note: The wavelengths are from CHIANTI. Table 5: Spontaneous transition probabilities from the metastable levels in 3s2 3p2 3d of Fe XII -------------------------------------------------------------------------------- Transition A (s-1) -------------------------------------------------------------------------------- 3s2 3p2 3d (3P)4F9/2-3s2 3p3 2Do5/2 2.759E+01 3s2 3p2 3d (3P)4F9/2-3s 3p4 4P5/2 4.451E+01 3s2 3p2 3d (3P)4F9/2-3s 3p4 2D5/2 1.422E-01 3s2 3p2 3d (3P)4F9/2-3s2 3p2 3d (3P)4F5/2 5.068E-05 3s2 3p2 3d (3P)4F9/2-3s2 3p2 3d (3P)4F7/2 8.168E+00 3s2 3p2 3d (3P)4F9/2-3s2 3p2 3d (3P)4F9/2 5.916E-15 3s2 3p2 3d (1D)2G9/2-3s2 3p3 2Do5/2 2.178E+01 3s2 3p2 3d (1D)2G9/2-3s 3p4 4P5/2 7.614E+00 3s2 3p2 3d (1D)2G9/2-3s 3p4 2D5/2 1.494E+01 3s2 3p2 3d (1D)2G9/2-3s2 3p2 3d (3P)4F5/2 8.834E-02 3s2 3p2 3d (1D)2G9/2-3s2 3p2 3d (3P)4F7/2 6.249E+01 3s2 3p2 3d (1D)2G9/2-3s2 3p2 3d (3P)4F9/2 1.188E+02 3s2 3p2 3d (1D)2G9/2-3s2 3p2 3d (1D)2F5/2 1.266E-05 3s2 3p2 3d (1D)2G9/2-3s2 3p2 3d (3P)4D7/2 4.459E+00 3s2 3p2 3d (1D)2G9/2-3s2 3p2 3d (3P)4D5/2 3.454E-04 3s2 3p2 3d (1D)2G9/2-3s2 3p2 3d (1D)2F7/2 9.599E+00 3s2 3p2 3d (1D)2G9/2-3s2 3p2 3d (1D)2G7/2 2.783E-01 Acknowledgements: Enrico Landi References: Dere at al., CHIANTI. I 1997A&AS..125..149D, Cat. J/A+AS/125/149 Young et al., CHIANTI. II 1998A&A...329..291Y Landi et al., CHIANTI. III 1999A&AS..135..339L
(End) Patricia Bauer [CDS] 19-Mar-2001
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