An improved clusterion-photoelectron coincidence technique for the investigation of the ionisation dynamics of clusters

Cordis, L.; Ganteför, Gerd; Heßlich, Jürgen; Ding, Adalbert

An improved clusterion-photoelectron coincidence technique for the investigation of the ionisation dynamics of clusters

Dateien

ZPhysD31986.pdfGröße: 755.98 KBDownloads: 328

Datum

1986

Autor:innen

Cordis, L.

Ganteför, Gerd

Heßlich, Jürgen

Ding, Adalbert

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Physik

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Zeitschrift für Physik / D. 1986, 3(2-3), pp. 323-327. Available under: doi: 10.1007/BF01384823

Zusammenfassung

The introduction of photoion-photoelectron coincidence techniques has made it possible to investigate photoionisation properties of heavy clusters, which are not accessible by conventional mass spectrometry. This technique has been further developed in combination with a zero-volt electron energy analyser and greatly improved in performance. The method has been applied to the investigation of different homogeneous and heterogeneous clusters. This type of cluster experiment requires both a very high resolution and a large dynamic range in order to identify also clusters present in low abundance. As an example, a series of coincidence mass spectra of Xe clusters has been recorded at different wavelengths. Below a photon energy of 11.1 eV, the range of observable clusters shifts to higher cluster sizes with decreasing energy. Appearance potentials and the binding energy of different cluster ions were obtained. Intensity fluctuations, already observed in spectra with electron bombardment ionisation (magic numbers), have also been detected in the coincidence spectra and become most pronounced near the ionisation threshold. This indicates that these fluctuations are caused by the size-dependent stability of the ionic and not the neutral cluster. Furthermore, the threshold size does not change linearly with cluster size. The binding energy per particle seems to change drastically aroundn=13 which indicates the existence of a shell structure in the cluster ion.

Fachgebiet (DDC)

530 Physik

Zitieren

ISO 690

CORDIS, L., Gerd GANTEFÖR, Jürgen HESSLICH, Adalbert DING, 1986. An improved clusterion-photoelectron coincidence technique for the investigation of the ionisation dynamics of clusters. In: Zeitschrift für Physik / D. 1986, 3(2-3), pp. 323-327. Available under: doi: 10.1007/BF01384823

BibTex

@article{Cordis1986impro-9048,
  year={1986},
  doi={10.1007/BF01384823},
  title={An improved clusterion-photoelectron coincidence technique for the investigation of the ionisation dynamics of clusters},
  number={2-3},
  volume={3},
  journal={Zeitschrift für Physik / D},
  pages={323--327},
  author={Cordis, L. and Ganteför, Gerd and Heßlich, Jürgen and Ding, Adalbert}
}

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