XUV Absorption Spectra of Carbon Ions

International Astronomical Union Colloquium ◽

10.1017/s0252921100107444 ◽

1988 ◽

Vol 102 ◽

pp. 71-73

Author(s):

E. Jannitti ◽

P. Nicolosi ◽

G. Tondello

Keyword(s):

Absorption Spectra ◽

Cross Section ◽

Theoretical Calculations ◽

Photoionization Cross Section ◽

Carbon Ions

AbstractThe photoabsorption spectra of the carbon ions have been obtained by using two laser-produced plasmas. The photoionization cross-section of the CV has been absolutely measured and the value at threshold, σ=(4.7±0.5) × 10−19cm2, as well as its behaviour at higher energies agrees quite well with the theoretical calculations.

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Absorption Spectra And Photoionization Cross-Section Measurements Of Carbon Ions In The Extreme Ultraviolet

10.1117/12.945469 ◽

1988 ◽

Cited By ~ 4

Author(s):

E. Jannitti ◽

P Nicolosi ◽

G Tondello

Keyword(s):

Absorption Spectra ◽

Cross Section ◽

Extreme Ultraviolet ◽

Photoionization Cross Section ◽

Carbon Ions

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X-ray Photoionization Cross Section Spectra of Water and Ammonia Bonded on Polycyclic Aromatic Hydrocarbons: A Quantum Mechanical Interpretation to the Absorption Spectra on Graphene

The Journal of Physical Chemistry A ◽

10.1021/acs.jpca.9b11406 ◽

2020 ◽

Vol 124 (13) ◽

pp. 2591-2600

Author(s):

Bruno Nunes Cabral Tenorio ◽

Marco Antonio Chaer Nascimento ◽

Alexandre Braga Rocha

Keyword(s):

Polycyclic Aromatic Hydrocarbons ◽

Absorption Spectra ◽

Cross Section ◽

Aromatic Hydrocarbons ◽

Photoionization Cross Section ◽

Quantum Mechanical ◽

X Ray ◽

Polycyclic Aromatic ◽

Mechanical Interpretation

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Photoionization Cross-Sections of Carbon-Like N+ Near the K-Edge (390–440 eV)

Atoms ◽

10.3390/atoms9020027 ◽

2021 ◽

Vol 9 (2) ◽

pp. 27

Author(s):

Jean-Paul Mosnier ◽

Eugene T. Kennedy ◽

Jean-Marc Bizau ◽

Denis Cubaynes ◽

Ségolène Guilbaud ◽

...

Keyword(s):

High Resolution ◽

Cross Section ◽

Cross Sections ◽

Experimental Studies ◽

Photoionization Cross Section ◽

Theoretical Work ◽

Rydberg Series ◽

R Matrix ◽

Resonance Strengths ◽

Nitrogen Ion

High-resolution K-shell photoionization cross-sections for the C-like atomic nitrogen ion (N+) are reported in the 398 eV (31.15 Å) to 450 eV (27.55 Å) energy (wavelength) range. The results were obtained from absolute ion-yield measurements using the SOLEIL synchrotron radiation facility for spectral bandpasses of 65 meV or 250 meV. In the photon energy region 398–403 eV, 1s⟶2p autoionizing resonance states dominated the cross section spectrum. Analyses of the experimental profiles yielded resonance strengths and Auger widths. In the 415–440 eV photon region 1s⟶(1s2s22p2 4P)np and 1s⟶(1s2s22p2 2P)np resonances forming well-developed Rydberg series up n=7 and n=8 , respectively, were identified in both the single and double ionization spectra. Theoretical photoionization cross-section calculations, performed using the R-matrix plus pseudo-states (RMPS) method and the multiconfiguration Dirac-Fock (MCDF) approach were bench marked against these high-resolution experimental results. Comparison of the state-of-the-art theoretical work with the experimental studies allowed the identification of new resonance features. Resonance strengths, energies and Auger widths (where available) are compared quantitatively with the theoretical values. Contributions from excited metastable states of the N+ ions were carefully considered throughout.

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