Temporary negative-ion effects on photon emission from free zinc atoms excited by electron impact

Stuart Napier, Danica Cvejanovic, James Williams, Luka Pravica

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)
228 Downloads (Pure)

Abstract

Temporary negative-ion formation has been investigated by observing photon emission from electronimpact-excited 4s4p 3P1, 4s4p 1P1, 4s4d 3D1,2,3, 4s4d 1D2, and 4s5d 3D1,2,3 states of zinc. Photon excitation functions are presented for incident electron energies from the first excited state threshold (4.003 eV) to the first ionization potential (9.394 eV). The energies of isolated negative-ion resonance structures have been determined by fitting Fano profiles. These energies, and those of key features in the complicated overlapping resonance profiles, are compared with theory and previous experiments. The strength of resonance contributions, and which structures are dominant, depends on the spin and orbital angular momentum properties of the observed state.
Original languageEnglish
Pages (from-to)online - approx 5-20pp
JournalPhysical Review A
Volume78
Issue number2
DOIs
Publication statusPublished - 2008

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