Frequency dependence of level depletion in Na clusters and in C₂H₄

Abstract

Abstract. In the framework of time-dependent density-functional theory, we study electron emission from Na clusters and the C 2 H 4 molecule as induced by irradiation with an intense pulse. The collision of a charged projectile on C 2 H 4 is also explored for comparison. We look in particular at the level depletion, i.e. the electron loss in each single-electron level separately. It is found that the distribution of electron loss depends sensitively on the photon frequency. Frequencies close to visible light remove electrons exclusively from the vicinity of the Fermi surface while light in the higher UV range (up to 20 eV for Na clusters and up to 136 eV for C 2 H 4 ) depletes all levels about equally strong, down to the deepest bound valence state.Confidential: not for distribution.

Collision dynamics of proton with formaldehyde: Fragmentation and ionization

“…N el only considers the valence electrons, because the core electrons are energetically far below the valence levels. 57,58 The inner shell electrons and their parent nuclei constitute a whole entity which is called atomic center in a molecule or a molecular fragment. If the atomic center leaves its parent molecule alone, it is called ion.…”

On the dynamics of photo-electrons in C60

“…It demonstrates that measurement of PES gives indeed access to the spectra of the occupied states, however, weighted with the depletion. The latter strongly depends on the photon frequency [57], see discussion below.…”

Fingerprints of level depletion in the photoelectron spectra of small Na clusters in the ultraviolet domain

“…The sideward 'point' collects the photoelectron yield over the circle perpendicular to the z-axis and centered in the cylindrical box. We have previously studied the influence of the laser frequency in the depletion of Na + 9 , Na 2+ 22 and C 2 H 4 [11]. In this paper, we consider Na 8 and Na 10 in addition to Na + 9 , and complement the analysis of the depletion results by a comparison with the trends of PES.…”

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