Ultraviolet Absorption of Atomic Nitrogen in its Ionization Continuum*

Ehler, A. W.; Weissler, G. L.

doi:10.1364/josa.45.001035

Cited by 33 publications

(3 citation statements)

References 8 publications

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“…The total photoionization cross section of nitrogen over a photon energy region including the 2s2ps(sS )np(4P') Rydberg series, 17.7 -20.4 eV, was measured in photoabsorption by Ehler and Weissler [9], and later by Comes and Elzer [10]. Recently, Samson and Angel [11] have recorded the photoionization cross section of nitrogen using ion spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

Angle-resolved photoelectron spectrometry of atomic nitrogen

et al. 1993

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The relative photoionization cross section of atomic nitrogen across the 2s2p (S')np(P') autoionizing states and the P parameter over the 2s~Bp and 4p resonances are measured using synchrotron-radiation-based photoelectron spectrometry. Results are compared with a multiconfiguration Hartree-Fock calculation. Resonance energies for autoionizing states from n = 3-10 are presented and compared with an earlier experiment. Values of the line-shape parameters I', q, and p and discrete oscillator strengths f for the 3p, 4p, and 5p resonances are reported.

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Section: Introductionmentioning

confidence: 99%

Angle-resolved photoelectron spectrometry of atomic nitrogen

et al. 1993

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“…On experiments side, because of the difficulty in producing a sufficient number of free atoms from the dissociation of N 2 , only a few experimental studies on the photoionization cross sections have been made. [29−31] Ehler and Weissler [29] reported the first measurement of the absolute absorption cross sections between 400 Å and 700 Å. Comes and Elzer.…”

Section: Introductionmentioning

confidence: 99%

Interference effects on the photoionization cross sections between two neighbouring atoms: nitrogen as an example

Yuan

2009

Chinese Phys. B

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Interference effects on the photoionization cross sections between two neighbouring atoms are considered based on the coherent scattering of the ionized electrons by the two nuclei when their separation is less than or comparable to the de Broglie wave length of the ionized electrons. As an example, the single atomic nitrogen ionization cross section and the total cross sections of two nitrogen atoms with coherently added photoionization amplitudes are calculated from the threshold to about 60 Å (1 Å=0.1 nm) of the photon energy. The photoionization cross sections of atomic nitrogen are obtained by using the close-coupling R-matrix method. In the calculation 19 states are included. The ionization energy of the atomic nitrogen and the photoionization cross sections agree well with the experimental results. Based on the R-matrix results of atomic nitrogen, the interference effects between two neighbouring nitrogen atoms are obtained. It is shown that the interference effects are considerable when electrons are ionized just above the threshold, even for the separations between the two atoms are larger than two times of the bond length of N 2 molecules. Therefore, in hot and dense samples, effects caused by the coherent interference between the neighbours are expected to be observable for the total photoionization cross sections.

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“…Experimentally, Ehler and Weissler (1955) reported the first measurement of the photoionization cross section and covered the region between 400 and 700 8,. Comes andElzer (1967, 1968) carried out measurements in the range 450-852 8, and obtained data significantly different from those of Ehler and Weissler.…”

Section: Introductionmentioning

confidence: 99%

Photoionization of the⁴S^oground state of atomic nitrogen and atomic nitrogen⁴S^o-⁴P oscillator strengths

Bell

Berrington

1991

J. Phys. B: At. Mol. Opt. Phys.

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Ultraviolet Absorption of Atomic Nitrogen in its Ionization Continuum*

Cited by 33 publications

References 8 publications

Angle-resolved photoelectron spectrometry of atomic nitrogen

Angle-resolved photoelectron spectrometry of atomic nitrogen

Interference effects on the photoionization cross sections between two neighbouring atoms: nitrogen as an example

Photoionization of the⁴S^oground state of atomic nitrogen and atomic nitrogen⁴S^o-⁴P oscillator strengths

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Ultraviolet Absorption of Atomic Nitrogen in its Ionization Continuum*

Cited by 33 publications

References 8 publications

Angle-resolved photoelectron spectrometry of atomic nitrogen

Angle-resolved photoelectron spectrometry of atomic nitrogen

Interference effects on the photoionization cross sections between two neighbouring atoms: nitrogen as an example

Photoionization of the4Soground state of atomic nitrogen and atomic nitrogen4So-4P oscillator strengths

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Photoionization of the⁴S^oground state of atomic nitrogen and atomic nitrogen⁴S^o-⁴P oscillator strengths