J/ApJS/167/315 Na IX-X & Mg X-XI recombination rate coefficients (Nahar+, 2006)
Electron-ion recombination rate coefficients and photoionization cross sections
for astrophysically abundant elements.
XII. Na IX, Na X, Mg X, and Mg XI for ultraviolet and X-ray modeling.
Nahar S.N.
<Astrophys. J. Suppl. Ser., 167, 315-333 (2006)>
=2006ApJS..167..315N 2006ApJS..167..315N
ADC_Keywords: Atomic physics
Keywords: atomic processes - line: formation - X-rays: general
Abstract:
Detailed study on the inverse processes of photoionization and
electron-ion recombination for NaIX+hν←>NaX+e, NaX+hν←>NaXI+e,
MgX+hν←>Mgν+e, and MgXI+hν←>MgXII+e is reported. The
unified method for the total electron-ion recombination is used for
the self-consistent results of total and level-specific recombination
rate coefficients αR and αR(i) (subsuming both
radiative recombination [RR] and dielectronic recombination [DR]),
total recombination cross sections σRC, and total and partial
level-specific photoionzation cross sections σPI and
σPI(g). The total recombination spectrum of cross sections and
recombination rates versus photoelectron energy are presented for
experimental applications. The unified method employs close-coupling
approximation in the relativistic Breit-Pauli R-matrix (BPRM) method.
The coupled channel wave function expansions for Li-like NaIX and MgX
consist of 17 core levels with excitations up to 3d orbital and for
He-like NaX and MgXI consist of 16 core levels of excitations up to 4f
orbital, respectively. The results are presented for all
fine-structure levels of the ions up to n≤10, which correspond to 98
levels with 1/2≤J≤17/2 for Li-like NaIX and MgX, 182 and 185 levels
with 0≤J≤10 for He-like NaX and MgXI, respectively. The level
specific photoionization cross sections σPI(nSLJ) and
recombination rates αR(T; nSLJ) are obtained for the first
time for these ions. The single-valued total αR(T) is
presented over an extended temperature range for astrophysical and
laboratory plasma applications. The total unified R(T) for all ions
agrees very well with the available published RR and DR rates. Total
recombination rates for H-like NaXI and MgXII are also presented for
completeness. The results are expected to be accurate within 10%15%
from considerations of important atomic effects such as radiation
damping, channel couplings, and interference of DR and RR. The
comprehensive data sets are applicable for ionization balance and
recombination-cascade models for UV and X-ray lines.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 58 17 Target level in the eigenfunctions of
NaX, Mg XI, NaXI and MgXII
table3.dat 57 81 Total recombination rate coefficients
αR(T) for NaIX-XI and Mg X-XII
table4.dat 81 162 Level specific recombination rate coefficients
for the ground and excited 2l and 3l levels of
Na IX and Mg X
table5.dat 54 162 Level specific recombination rate coefficients for
the ground and Kα levels of Na X and Mg XI
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- Index Index
4- 12 A9 --- Level1 Level 1
15- 21 F7.4 Ry E(NaX) Energy of the core level 1 for NaX
23- 31 F9.5 Ry E(MgXI) Energy of the core level 1 for MgXI
33- 41 A9 --- Level2 Level 2
43- 50 F8.4 Ry E(NaXI) ? Energy of the core level 2 for NaXI
52- 58 F7.3 Ry E(MgXII) ? Energy of the core level 2 for MgXII
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 F3.1 [K] logT Log of the temperature
5- 12 E8.2 cm3/s NaIX The Na IX total recombination rate coefficient
14- 21 E8.2 cm3/s NaX The Na X total recombination rate coefficient
23- 30 E8.2 cm3/s NaXI The Na XI total recombination rate coefficient
32- 39 E8.2 cm3/s MgX The Mg X total recombination rate coefficient
41- 48 E8.2 cm3/s MgXI The Mg XI total recombination rate coefficient
50- 57 E8.2 cm3/s MgXII The Mg IX total recombination rate coefficient
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 A5 --- Ion Ion identification
7- 9 F3.1 [K] logT Log of the Temperature
11- 18 E8.2 cm3/s 2s2S1/2 The 2s 2S1/2 level recombination
rate coefficient (1)
20- 27 E8.2 cm3/s 3s2S1/2 The 3s 2S1/2 level recombination
rate coefficient (1)
29- 36 E8.2 cm3/s 2p2P1/2 The 2p 2Po1/2 level recombination
rate coefficient (1)
38- 45 E8.2 cm3/s 3p2P1/2 The 3p 2Po1/2 level recombination
rate coefficient (1)
47- 54 E8.2 cm3/s 3d2D3/2 The 3d 2D3/2 level recombination
rate coefficient (1)
56- 63 E8.2 cm3/s 2p2P3/2 The 2p 2Po3/2 level recombination
rate coefficient (1)
65- 72 E8.2 cm3/s 3p2P3/2 The 3p 2Po3/2 level recombination
rate coefficient (1)
74- 81 E8.2 cm3/s 3d2D5/2 The 3d 2D5/2 level recombination
rate coefficient (1)
--------------------------------------------------------------------------------
Note (1): Where the binding energy (in Rydbergs) for the levels of
Na IX and Mg X are:
------------------------------
Level Na IX Mg X
------------------------------
2s 2S1/2 -22.0 -27.0
3s 2S1/2 -9.50 -11.7
2p 2Po1/2 -20.7 -25.6
3p 2Po1/2 -9.14 -11.3
3d 2D3/2 -9.01 -11.1
2p 2Po3/2 -20.7 -25.5
3p 2Po3/2 -9.14 -11.3
3d 2D5/2 -9.01 -11.1
------------------------------
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 A5 --- Ion Ion identification
7- 9 F3.1 [K] logT Log of the Temperature
11- 18 E8.2 cm3/s 1s21S The 1s2 1S0 level recombination
rate coefficient (1)
20- 27 E8.2 cm3/s 1s2s3S1 The 1s2s3S1 level recombination
rate coefficient (1)
29- 36 E8.2 cm3/s 1s2p3P1 The 1s2p3Po1 level recombination
rate coefficient (1)
38- 45 E8.2 cm3/s 1s2p1P1 The 1s2p1Po1 level recombination
rate coefficient (1)
47- 54 E8.2 cm3/s 1s2p3P2 The 1s2p3Po2 level recombination
rate coefficient (1)
--------------------------------------------------------------------------------
Note (1): Where the binding energy (in Rydbergs) for the levels of
Na IX and Mg X are:
-------------------------------
Level Na X Mg XI
-------------------------------
1s2 1S0 -108.0 -129.0
1s2s3S1 -26.3 -31.7
1s2p3Po1 -25.5 -30.8
1s2p1Po1 -24.9 -30.1
1s2p3Po2 -25.4 -30.7
-------------------------------
--------------------------------------------------------------------------------
History:
From electronic version of the journal
References:
Nahar et al., Paper I 1997ApJS..111..339N 1997ApJS..111..339N, Carbon and nitrogen
Nahar, Paper II 1999ApJS..120..131N 1999ApJS..120..131N, Oxygen ions
Nahar, Paper III 2000ApJS..126..537N 2000ApJS..126..537N, Si-sequence ions
Nahar et al., Paper IV 2000ApJS..131..375N 2000ApJS..131..375N, C IV-V
Nahar et al., Paper V 2001ApJS..133..255N 2001ApJS..133..255N, Fe XXIV-XXV
Nahar & Bautista, Paper VI 2001ApJS..137..201N 2001ApJS..137..201N, Ni II
Nahar & Pradhan, Paper VII 2003ApJS..149..239N 2003ApJS..149..239N, O VI-VII
Nahar, Paper VIII 2005ApJS..156...93N 2005ApJS..156...93N, Ar XIII
Nahar, Paper IX 2005ApJS..158...80N 2005ApJS..158...80N, Ni XXVI-XXVII
Nahar & Pradhan, Paper X 2006ApJS..162..417N 2006ApJS..162..417N, Ne VIII & Ne IX
Nahar, Paper XI 2006ApJS..164..280N 2006ApJS..164..280N, N V-VI & F VII-VIII
(End) Patricia Vannier [CDS] 08-Jun-2007