J/MNRAS/514/3113 Multiple photoionization for 2p shells in Fe atom (Kucas+ 2022)
Multiple photoionization for the 2p shells in the iron atom.
Kucas S., Kyniene A., Masys S., Jonauskas V.
<Mon. Not. R. Astron. Soc. 514, 3113-3119 (2022)>
=2022MNRAS.514.3113K 2022MNRAS.514.3113K (SIMBAD/NED BibCode)
ADC_Keywords: Atomic physics
Keywords: atomic data - atomic processes - line: formation
Abstract:
Multiple photoionization is investigated for the 2p shell in the iron
atom. Study of the single photoionization with subsequent radiative
and Auger cascade includes all levels of the ground configuration. It
is demonstrated that the quadruple photoionization dominates over
other multiple-photoionization processes. Analysis of the partial
photoionization cross sections to configurations of the produced ions
shows that the excited long-lived configurations accumulate the main
population of the Fe4+ ion. The main decay branches of the radiative
and Auger cascade following a creation of the 2p shell vacancy in the
iron atom are identified. The ion yields for the photoionization and
cascade obtained by considering level-to-level transitions are
compared to the previous configuration average calculations.
Description:
Multiple photoionization is investigated for the 2p subshell of the
iron atom. The process is studied as single photoionization of the 2p
subshell with subsequent decay through cascade of radiative and Auger
transitions. The study demonstrates that the quadruple photoionization
plays the main role among the multiple-photoionization channels.
Furthermore, the states of the excited Fe4+ 3d34s configuration
are primarily populated in the photoionization process. The
multiple-photoionization cross-sections to the states of the 3d34s
configuration produce ∼80% of the total cross-sections to the
Fe4+ ion.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
yield.dat 66 180 Ion yield for levels of the
Fe+ 2p5 3d6 4s2 configuration
levels.dat 75 180 Energy levels of the
Fe+ 2p5 3d6 4s2 configuration
listcs.dat 90 20 List of cross-section files
cs/* . 20 Photoionization cross-sections files
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Byte-by-byte Description of file: yield.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- i Index of level of the
Fe+ 2p5 3d6 4s2 configuration
7- 18 E12.3 % Fe1+ Ion yield of Fe1+
19- 30 E12.3 % Fe2+ Ion yield of Fe2+
31- 42 E12.3 % Fe3+ Ion yield of Fe3+
43- 54 E12.3 % Fe4+ Ion yield of Fe4+
55- 66 E12.3 % Fe5+ Ion yield of Fe5+
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Byte-by-byte Description of file: levels.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- i Index of level of the
Fe+ 2p5 3d6 4s2 configuration
8- 57 A50 --- Term Term of the configuration
60- 63 A4 --- J Total angular momentum
69- 75 F7.3 eV Energy Energy of level
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Byte-by-byte Description of file: listcs.dat
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Bytes Format Units Label Explanations
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1- 21 A21 --- FileName Name of the file in subdirectory cs
23- 90 A68 --- Title Title of the file
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Byte-by-byte Description of file: cs/*
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Bytes Format Units Label Explanations
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1- 7 I7 eV E Energy
8- 22 E15.3 10-20cm2 CS0 Cross section for level with index 0
23- 37 E15.3 10-20cm2 CS1 Cross section for level with index 1
38- 52 E15.3 10-20cm2 CS2 Cross section for level with index 2
53- 67 E15.3 10-20cm2 CS3 Cross section for level with index 3
68- 82 E15.3 10-20cm2 CS4 Cross section for level with index 4
83- 97 E15.3 10-20cm2 CS5 Cross section for level with index 5
98-112 E15.3 10-20cm2 CS6 Cross section for level with index 6
113-127 E15.3 10-20cm2 CS7 Cross section for level with index 7
128-142 E15.3 10-20cm2 CS8 Cross section for level with index 8
143-157 E15.3 10-20cm2 CS9 Cross section for level with index 9
158-172 E15.3 10-20cm2 CS10 Cross section for level with index 10
173-187 E15.3 10-20cm2 CS11 Cross section for level with index 11
188-202 E15.3 10-20cm2 CS12 Cross section for level with index 12
203-217 E15.3 10-20cm2 CS13 Cross section for level with index 13
218-232 E15.3 10-20cm2 CS14 Cross section for level with index 14
233-247 E15.3 10-20cm2 CS15 Cross section for level with index 15
248-262 E15.3 10-20cm2 CS16 Cross section for level with index 16
263-277 E15.3 10-20cm2 CS17 Cross section for level with index 17
278-292 E15.3 10-20cm2 CS18 Cross section for level with index 18
293-307 E15.3 10-20cm2 CS19 Cross section for level with index 19
308-322 E15.3 10-20cm2 CS20 Cross section for level with index 20
323-337 E15.3 10-20cm2 CS21 Cross section for level with index 21
338-352 E15.3 10-20cm2 CS22 Cross section for level with index 22
353-367 E15.3 10-20cm2 CS23 Cross section for level with index 23
368-382 E15.3 10-20cm2 CS24 Cross section for level with index 24
383-397 E15.3 10-20cm2 CS25 Cross section for level with index 25
398-412 E15.3 10-20cm2 CS26 Cross section for level with index 26
413-427 E15.3 10-20cm2 CS27 Cross section for level with index 27
428-442 E15.3 10-20cm2 CS28 Cross section for level with index 28
443-457 E15.3 10-20cm2 CS29 Cross section for level with index 29
458-472 E15.3 10-20cm2 CS30 Cross section for level with index 30
473-487 E15.3 10-20cm2 CS31 Cross section for level with index 31
488-502 E15.3 10-20cm2 CS32 Cross section for level with index 32
503-517 E15.3 10-20cm2 CS33 Cross section for level with index 33
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Acknowledgements:
Sigitas Kucas, sigitas.kucas(at)tfai.vu.lt
(End) Patricia Vannier [CDS] 09-Feb-2022