ISSN:
1434-6079
Keywords:
PACS: 36.40.Mr Spectroscopy and geometrical structure of clusters – 71.24.+q Electronic structure of clusters and nanoparticles
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract. We examine the photoionization thresholds of Ge n (n=2-34) with a wide photon energy (5.0–8.6 eV) using a laser photoionization time-of-flight mass spectrometry. A high-output vacuum ultraviolet light generated with stimulated Raman scattering is used as the ionization light source in the energy above 6.0 eV. A characteristic size dependence of ionization potential (IP) with a maximum at n=10 is found for clusters smaller than 22 atoms. The rather high IP of Ge10 in comparison with its neighbors is consistent with the results on the photodissociation study of Ge n +. We also find that IPs decrease rapidly from n=16 to 22, and then decrease at a much slower rate for larger clusters. These features in IPs are similar to those of Sin reported in our previous paper, except for the smaller IP gap of Ge n at n≈20. We discuss these results on IPs in relation to their electronic structure and stability.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s100530050410
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