J/ApJS/207/11 Fe XVI radiative rates (Diaz+, 2013)
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High-accuracy MR-MP perturbation theory energy and radiative rates calculations
for core-excited transitions in Fe XVI.
Diaz F., Vilkas M.J., Ishikawa Y., Beiersdorfer P.
=2013ApJS..207...11D
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ADC_Keywords: Atomic physics ; X-ray sources
Keywords: atomic processes - line: formation - stars: coronae -
Sun: X-rays, gamma rays - X-rays: general
Abstract:
Accurate theoretical energy level, lifetime, and transition
probability calculations of core-excited Fe XVI were performed
employing the relativistic Multireference Moller-Plesset perturbation
theory. In these computations the term energies of the highly excited
n<=5 states arising from the configuration 1s^2^2s^k^2p^m^3l^p^nl'^q^,
where k+m+p+q=9, l<=3 and p+q<=2 are considered, including those of
the autoionizing levels with a hole-state in the L-shell. All even and
odd parity states of sodium-like iron ion were included for a total of
1784 levels. Comparison of the calculated L-shell transition
wavelengths with those from laboratory measurements shows excellent
agreement. Therefore, our calculation may be used to predict the
wavelengths of as of yet unobserved Fe XVI, such as the second
strongest 2p-3d Fe XVI line, which has not been directly observed in
the laboratory and which blends with one of the prominent Fe XVII
lines.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 69 1784 Energies (in cm^-1^) of the 1s^2^2s^2^2p^6^nl
levels (n<=5, l<=3) in FeXVI
table9.dat 49 925 Theoretical radiative transition rates (A_r_ in
x10^12^s^-1^) and radiative branching ratios
({beta}={tau}A_r_) of E1 transitions situated
between 15.016{AA} and 15.267{AA}
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See also:
J/A+A/463/399 : Fe XVI radiative rates (Aggarwal+, 2007)
J/A+A/450/1249 : Fe XVI radiative and excitation rates (Aggarwal+, 2006)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 48 A48 --- Config Core configuration
50- 51 I2 --- 2J [1/11] J*2 index (G1)
52- 53 A2 --- --- [/2]
55 A1 --- --- [(]
56- 58 I3 --- p [1/236] Parity (G1)
59 A1 --- --- [)]
60 A1 --- n_p [*] odd parity (G1)
62- 69 I8 cm-1 E [0/10415986] Energy of the configuration
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Byte-by-byte Description of file: table9.dat
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Bytes Format Units Label Explanations
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1- 7 F7.3 0.1nm lambda [10/139] Wavelength {lambda} ({AA})
9- 10 I2 --- 2J1 [1/11] Upper J*2 level (G1)
11- 12 A2 --- --- [/2]
14 A1 --- --- [(]
15- 17 I3 --- p1 [1/228] Parity associated with J1 level (G1)
18 A1 --- --- [)]
19 A1 --- f_p1 [*] Odd parity (G1)
21- 22 I2 --- 2J0 [1/11] Lower J*2 level (G1)
23- 24 A2 --- --- [/2]
26 A1 --- --- [(]
27- 29 I3 --- p0 [1/78] Parity associated with J0 level (G1)
30 A1 --- --- [)]
31 A1 --- f_p0 [*] Odd parity (G1)
33- 40 F8.3 10+11/s Ar [12/2385] Radiative transition rate (2)
42- 49 F8.3 --- beta [10/2350] Radiative branching ratio (2)
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Note (2): Only transition with A_r_>=10^+11^s^-1^ are listed.
Calculated with the CI (Configuration Interaction) method.
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Gloval Notes:
Note (G1): The energy-ordered index for a given level with total angular
momentum J and parity is given in parentheses. An asterisk denotes odd
parity configurations; the lack thereof denotes an even parity
configuration.
History:
From electronic version of the journal
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(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 09-Aug-2013