Simultaneous ejection of two molecular ions from keV gold atomic and polyatomic projectile impacts

We present the first experimental data on the simultaneous ejection of two molecular ions from the impact of Au(+)(n) (1< or =n< or =4) with energies ranging between 17 and 56 keV. The yields from single phenylalanine (Ph) emission, coemission of two Ph ions, and emission of the Ph dimer were...

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Veröffentlicht in:Physical review letters 2004-01, Vol.92 (4), p.047601-047601, Article 047601
Hauptverfasser: Rickman, R D, Verkhoturov, S V, Parilis, E S, Schweikert, E A
Format: Artikel
Sprache:eng
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Zusammenfassung:We present the first experimental data on the simultaneous ejection of two molecular ions from the impact of Au(+)(n) (1< or =n< or =4) with energies ranging between 17 and 56 keV. The yields from single phenylalanine (Ph) emission, coemission of two Ph ions, and emission of the Ph dimer were measured. Large increases (1 to 2 orders of magnitude) in coemitted ion yields were observed with increasing projectile energy and complexity. Correlation coefficients were calculated for the coemission of two Ph ions; their behavior suggests differences in emission pathways for bombardment by atomic and polyatomic projectiles.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.92.047601