Electron-impact ionization of Be-like CIII, NIV, and OV

被引：32

作者：

Fogle, M. ^{[1
]}

Bahati, E. M. ^{[1
]}

Bannister, M. E. ^{[1
]}

Vane, C. R. ^{[1
]}

Loch, S. D. ^{[2
]}

Pindzola, M. S. ^{[2
]}

Ballance, C. P. ^{[3
]}

Thomas, R. D. ^{[4
]}

Zhaunerchyk, V. ^{[4
]}

Bryans, P. ^{[5
]}

Mitthumsiri, W. ^{[5
]}

Savin, D. W. ^{[5
]}

机构：

[1] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA

[2] Auburn Univ, Dept Phys, Auburn, AL 36849 USA

[3] Rollins Coll, Dept Phys, Winter Pk, FL 32789 USA

[4] Univ Stockholm, Dept Phys, S-10691 Stockholm, Sweden

[5] Columbia Univ, Columbia Astrophys Lab, New York, NY 10027 USA

来源：

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES | 2008年 / 175卷 / 02期

关键词：

atomic data; atomic processes; methods : laboratory;

D O I：

10.1086/525256

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present recent measurements of absolute electron-impact ionization cross sections for Be-like C III, N IV, and O V forming Li- like C IV, N V, and O VI. The measurements were taken using the crossed-beams apparatus at Oak Ridge National Laboratory. A gas cell beam attenuation method was used to independently measure the metastable fractions present in the ion beams. The measured ionization cross sections were compared with calculations using the R-matrix with pseudostates and distorted-wave theoretical methods. Best agreement is found with the R-matrix with pseudostates cross sections results that account for the metastable fractions inferred from the gas attenuation measurements. We present a set of recommended rate coefficients for electron-impact single ionization from the ground state and metastable term of each ion.

引用

页码：543 / 556

页数：14

共 50 条

[31] Electron-impact excitation of Ge III and photoionization of GeII
Dunleavy, N. L.
Ballance, C. P.
Ramsbottom, C. A.
Jeffery, C. S.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2021, 506 (04) : 5398 - 5409
[32] Electron impact excitation of NIV: calculations with the DARC code and a comparison with ICFT results
Aggarwal, K. M.
Keenan, F. P.
Lawson, K. D.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2016, 461 (04) : 3997 - 4012
[33] Ionization cross section by electron impact of helium-like ions
Belgacem, Manel Hariz
Guedda, Elhabib
Jelassi, Haikel
CANADIAN JOURNAL OF PHYSICS, 2021, 99 (11) : 969 - 974
[34] R-matrix electron-impact excitation data for the B-like iso-electronic sequence
Liang, G. Y.
Badnell, N. R.
Zhao, G.
ASTRONOMY & ASTROPHYSICS, 2012, 547
[35] R-matrix electron-impact excitation data for the Na-like iso-electronic sequence
Liang, G. Y.
Whiteford, A. D.
Badnell, N. R.
ASTRONOMY & ASTROPHYSICS, 2009, 500 (03) : 1263 - 1269
[36] R-matrix electron-impact excitation data for the Ne-like iso-electronic sequence
Liang, G. Y.
Badnell, N. R.
ASTRONOMY & ASTROPHYSICS, 2010, 518
[37] COLLISION STRENGTHS AND RATE COEFFICIENTS FOR ELECTRON-IMPACT EXCITATION IN HE-I - AN EXTRAPOLATION OF R-MATRIX CALCULATIONS TO HIGHER ELECTRON-IMPACT ENERGIES
LANZAFAME, AC
TULLY, JA
BERRINGTON, KA
DUFTON, PL
BYRNE, PB
BURGESS, A
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1993, 264 (02) : 402 - 410
[38] EFFECTIVE COLLISION STRENGTHS FOR ELECTRON-IMPACT EXCITATION OF Fe VIII
Tayal, S. S.
Zatsarinny, O.
ASTROPHYSICAL JOURNAL, 2011, 743 (02)
[39] Electron-impact excitation of Fe IX
Tayal, S. S.
Zatsarinny, O.
XXIX INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC, AND ATOMIC COLLISIONS (ICPEAC2015), PTS 1-12, 2015, 635
[40] Electron-impact excitation of neutral oxygen
Barklem, P. S.
ASTRONOMY & ASTROPHYSICS, 2007, 462 (02) : 781 - 788

← 1 2 3 4 5 →