J/A+A/439/387 Absolute photoionization cross sections (Bizau+, 2005)
Absolute cross sections for L-shell photoionization of
the ions N2+, N3+, O3+, O4+, F3+, F4+ and Ne4+.
Bizau J.-M., Champeaux J.-P., Cubaynes D., Wuilleumier F.J., Folkmann F.,
Jacobsen T.S., Penent F., Blancard C., Kjeldsen H.
<Astron. Astrophys. 439, 387 (2005)>
=2005A&A...439..387B 2005A&A...439..387B
ADC_Keywords: Atomic physics
Keywords: atomic data - atomic processes - line: identification
Abstract:
Absolute photoionization cross sections for the ions N2+, N3+, O3+,
O4+, F3+ , F4+ and Ne4+ are measured using the merged-beam technique,
combining the synchrotron radiation from an undulator at the storage
ring ASTRID with ions produced by an ECR ion source.
The files contain the experimental absolute cross-section data
reported in the paper. Each ascii file has 3 columns: Photon energy
(eV), Cross section (Mb) and Statistical uncertainty (Mb). In addition
to the latter there is a systematic uncertainty on the cross sections
of about 15%. (1Mb=10-18cm2).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
fiv.dat 27 685 The measured photoionization cross section of F3+
fv.dat 30 749 The measured photoionization cross section of F4+
nev.dat 27 245 The measured photoionization cross section of Ne4+
niii.dat 30 3327 The measured photoionization cross section of N2+
niv.dat 29 271 The measured photoionization cross section of N3+
oiv.dat 27 701 The measured photoionization cross section of O3+
ov.dat 30 536 The measured photoionization cross section of O4+
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See also:
J/A+AS/109/125 : Photoionisation cross section (Verner+, 1995)
Byte-by-byte Description of file: *.dat
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Bytes Format Units Label Explanations
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1- 7 F7.3 eV PhE Photon energy
9- 16 F8.5 10-18cm2 CS ? Cross section (in Mbarn)
18- 29 F12.5 10-18cm2 SU ? Statistical uncertainty
30 A1 --- n_CS [N] N: CS and SU not analysed
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Acknowledgements: Henrik Kjeldsen, kjeldsen(at)phys.au.dk
(End) Patricia Vannier [CDS] 21-Apr-2005