Measurements of lithium cluster ionization potentials

Dugourd, Philippe; Rayane, D.; Labastie, P.; Vezin, B.; Chevaleyre, J.; Broyer, M.

doi:10.1016/0009-2614(92)85796-d

Cited by 99 publications

(71 citation statements)

References 17 publications

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“…However, the calculations tend to favor a bridge position which is not the ELF and Fukui function prediction. For some of them, especially Rb 7 and Cs 7 , the geometry changes markedly and it is difficult to recognize the initial metal skeleton. In Figure 9, we present the adsorption energies, which are measured as the energy gain due to the hydrogen atom binding.…”

Section: Hydrogenationmentioning

confidence: 99%

“…Among all the possible homogeneous metallic atomic clusters, the simplest ones appear to be the atomic lithium clusters, and therefore, there are variety of experimental [3][4][5][6][7] and theoretical [8 -12] studies devoted to theses clusters. The next metal alkaline atom in the periodic table, Na, has also been object of intensive studies [11,[13][14][15][16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

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A theoretical study of alkali metal atomic clusters: From Li_n to Cs_n (n = 2–8)

Flórez

Fuentealba

2008

Int J of Quantum Chemistry

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ABSTRACT:A theoretical study of the electronic structure of the first members of the alkali metal atomic clusters series Li n to Cs n (n ϭ 2-8) has been done. The geometries of some isomers of the neutral, positive, and negative charged clusters have been determined. Some important properties have also been calculated: atomic binding energies, vertical and adiabatic ionization potentials, vertical and adiabatic electron affinities, static dipole polarizabilities, and energy gaps. Whenever possible they have been compared with experimental values yielding a reasonable agreement which supports some new values as reliable predictions. The data have been discussed in light of the periodic table of elements trends.

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Section: Hydrogenationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A theoretical study of alkali metal atomic clusters: From Li_n to Cs_n (n = 2–8)

Flórez

Fuentealba

2008

Int J of Quantum Chemistry

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“…Previous studies have looked at many different aspects of lithium clusters: the structure of Li n , [3][4][5][6] their optical absorption spectra, [7][8][9][10] the ionization energies (IEs) and electron affinities (EAs) of Li n (n = 2, 4, 6, 8). [11][12][13] In addition, lithium has the ability to form heterogeneous clusters with various elements, for example: Li n B, [14] Li n Be, [15] Li n Mg, [15] Li n Sn, [16] Li n O, [17,18] Li n C, [19,20] etc. The first experimental evidence of nonmetal doped lithium clusters was the discovery of Li n O (n = 3, 4, 5) clusters by Wu et al [21,22] The first theoretical work on the existence of Li n O clusters was reported by Schleyer et al, where these kinds of clusters were named hyperlithiated clusters (or molecules).…”

mentioning

confidence: 99%

Formation and ionization energies of small chlorine‐doped lithium clusters by thermal ionization mass spectrometry

Veličković

Djustebek

Veljković

et al. 2012

Rapid Comm Mass Spectrometry

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“…. The models are being tested and validated with new cluster production and measurement techniques on clusters consisting of a few atoms to thousands of atoms (e.g., Ekardt, 1985;Seidl et al, 1991;Bréchignac et al, 1992;Dugourd et al 1992;de Heer et al, 2003;Wong et al 2003). The measurements clearly indicate lower ionization potentials and therefore higher expected photoelectric yields for larger clusters.…”

Section: Theoretical Considerations and Comparison With Measurementsmentioning

confidence: 99%

Lunar dust charging by photoelectric emissions

Abbas

Tankosic

Craven

et al. 2007

Planetary and Space Science

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The lunar surface is covered with a thick layer of sub-micron/micron size dust grains formed by meteoritic impact over billions of years. The fine dust grains are levitated and transported on the lunar surface, as indicated by the transient dust clouds observed over the lunar horizon during the Apollo 17 mission. Theoretical models suggest that the dust grains on the lunar surface are charged by the solar UV radiation as well as the solar wind. Even without any physical activity, the dust grains are levitated by electrostatic fields and transported away from the surface in the near vacuum environment of the Moon. The current dust charging and levitation models, however, do not fully explain the observed phenomena. Since the abundance of dust on the Moon's surface with its observed adhesive characteristics has the potential of severe impact on human habitat and operations and lifetime of a variety of equipment, it is necessary to investigate the charging properties and the lunar dust phenomena in order to develop appropriate mitigating strategies.Photoelectric emission induced by the solar UV radiation with photon energies higher than the work function of the grain materials is recognized to be the dominant process for charging of the lunar dust, and requires measurements of the photoelectric yields to determine the charging and equilibrium potentials of individual dust grains. In this paper, we present the first laboratory measurements of the photoelectric efficiencies and yields of individual submicron/micron size dust grains selected from sample returns of Apollo 17, and Luna 24 missions, as well as similar size dust grains from the JSC-1 simulants. The measurements were made on a laboratory facility based on an electrodynamic balance that permits a variety of experiments to be conducted on individual sub-micron/micron size dust grains in simulated space environments. The photoelectric emission measurements indicate grain size dependence 2 with the yield increasing by an order of magnitude for grains of sub-micron to several micron size radii, at which it reaches asymptotic values. The yield for large size grains is found to be more than an order of magnitude higher than the bulk measurements on lunar fines reported in the literature.

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Measurements of lithium cluster ionization potentials

Cited by 99 publications

References 17 publications

A theoretical study of alkali metal atomic clusters: From Li_n to Cs_n (n = 2–8)

A theoretical study of alkali metal atomic clusters: From Li_n to Cs_n (n = 2–8)

Formation and ionization energies of small chlorine‐doped lithium clusters by thermal ionization mass spectrometry

Lunar dust charging by photoelectric emissions

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Measurements of lithium cluster ionization potentials

Cited by 99 publications

References 17 publications

A theoretical study of alkali metal atomic clusters: From Lin to Csn (n = 2–8)

A theoretical study of alkali metal atomic clusters: From Lin to Csn (n = 2–8)

Formation and ionization energies of small chlorine‐doped lithium clusters by thermal ionization mass spectrometry

Lunar dust charging by photoelectric emissions

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A theoretical study of alkali metal atomic clusters: From Li_n to Cs_n (n = 2–8)

A theoretical study of alkali metal atomic clusters: From Li_n to Cs_n (n = 2–8)