Role of d screening in ion-excited electron emission from Ca

Matthew, J.A.D.; Gallon, M. A.; Gallon, T E

doi:10.1103/physrevb.55.2697

Cited by 4 publications

(2 citation statements)

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“…Details of the experimental apparatus and calibration methods have been published previously (Gallon et al 1995, Matthew et al 1997. Targets were cut from high-purity metal foils, except for the case of Ca where the target was prepared by in situ evaporation.…”

Section: Methodsmentioning

confidence: 99%

“…The electron emission spectrum from Ca metal excited by rare-gas-ion bombardment has been explained by the decay of neutral excited atoms from 3p 5 3d4s 2 states (Matthew et al 1997). This excited configuration is believed to have been formed from initial 3p bombardmentinduced ionization followed by neutralization as a result of d-electron screening by conduction electrons in the solid (Cole et al 1995) and subsequent emergence from the surface in an excited atomic state.…”

Section: Introductionmentioning

confidence: 99%

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Autoionizing emission from 3p⁵3dⁿ⁺¹4s²states of Ca, Sc, Ti and V, excited by ion impact on solid targets

Kam¹,

Gallon²,

Matthew³

et al. 1999

J. Phys.: Condens. Matter

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Electron emission spectra of metallic Ca, Sc, Ti and V excited by rare-gas-ion bombardment are presented. The spectra display distinctive atomic characteristics as well as solid-state structure due to M23VV Auger emissions. By energy considerations, we show that their main spectral features can be explained by atomic autoionizations of the excited metal atoms in 3p53dn+14s2 states with excitation energies less than the solid-state 3p ionization energy. The relative importance of the autoionization channels M23N1N1, M23M45N1 and M23M45M45 is investigated by comparing theoretically calculated spectra with the experimental spectra. Our work suggests that M23M45N1 transitions rather than super-Coster-Kronig M23M45M45 transitions dominate the decay channels.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%