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Static electric dipole polarizabilities of alkali clusters (1999)

Rayane, D. ; Allouche, A.R. ; Benichou, E. ; [et al.]

Springer

The European physical journal 9 (1999), S. 243-248

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ISSN: 1434-6079

Keywords: PACS: 36.40.-c Atomic and molecular clusters – 32.10.Dk Electric and magnetic moments, polarizability – 31.15.Ew Density functional theory

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract. We have measured the static dipole polarizability of lithium and sodium clusters (n=1-22). Values measured for sodium are in agreement with previous experiments. While the polarizability per atom for sodium clusters decreases slowly as a function of the cluster size, a sharp decrease between sizes 1 and 4 is observed for lithium clusters. Experimental values are compared to Density Functional Theory (DFT/PW91) calculations. The size evolutions for sodium and lithium cluster polarizabilities are well reproduced by our calculations. The sharp decrease observed for small lithium clusters is discussed in terms of electronic density.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/s100530050433

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Stopping power and nano-particles: Collisions of ions in low charge states with metallic clusters (2001)

Bergen, T. ; Brenac, A. ; Chandezon, F. ; [et al.]

Springer

The European physical journal 14 (2001), S. 317-322

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ISSN: 1434-6079

Keywords: PACS. 36.40.Wa Charged clusters – 34.50.Bw Energy loss and stopping power

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract: In an experimental study, the multi-ionisation of metallic clusters (Nan) has been analysed in collisions with light ions in low charge states (H+, He+, He2+, O3+) at collision velocities below 1 a.u. Cluster ions are produced in charge states up to 5+. The average charge of the nano-particles is found to increase linearly with the variation of projectile velocity and the square of the effective projectile charge, well in agreement with the electronic stopping power of the bulk material. A fraction of 50% to 30% of the total projectile energy loss (decreasing with velocity) is transferred into vibrational modes in good agreement with recent theoretical predictions.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/s100530170198

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Evaporation rates for Na clusters (1999)

Borggreen, J. ; Chandezon, F. ; Echt, O. ; [et al.]

Springer

The European physical journal 9 (1999), S. 119-122

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ISSN: 1434-6079

Keywords: PACS: 61.46.+w Clusters, nanoparticles, and nanocrystalline materials – 36.40.Qv Stability and fragmentation of clusters

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract. Na clusters in the size range of 50–400 atoms are led to evaporate in a heat bath with controlled temperature. For specific cluster sizes just above closed shells, decay rates are measured as a function of temperature. They agree with an Arrhenius law and allow absolute separation energies to be extracted.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/s100530050409

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