NAGIOS: RODERIC FUNCIONANDO

Magic numbers, excitation levels, and other properties of small neutral math clusters (N < 50)

Repositori DSpace/Manakin

IMPORTANT: Aquest repositori està en una versió antiga des del 3/12/2023. La nova instal.lació está en https://roderic.uv.es/

Magic numbers, excitation levels, and other properties of small neutral math clusters (N < 50)

Mostra el registre parcial de l'element

dc.contributor.author Guardiola Barcena, Rafael
dc.contributor.author Kornilov, Oleg
dc.contributor.author Navarro Faus, Jesús
dc.contributor.author Toennies, J. Peter
dc.date.accessioned 2010-05-20T09:23:22Z
dc.date.available 2010-05-20T09:23:22Z
dc.date.issued 2006
dc.identifier.citation GUARDIOLA, Rafael ; KORNILOV, Oleg ; NAVARRO, Jesús ; TOENNIES, J. Peter. Magic numbers, excitation levels, and other properties of small neutral math clusters (N < 50). En: Journal of Chemical Physics, 2006, vol. 124 en
dc.identifier.uri http://hdl.handle.net/10550/2436
dc.description.abstract The ground-state energies and the radial and pair distribution functions of neutral math clusters are systematically calculated by the diffusion Monte Carlo method in steps of one math atom from 3 to 50 atoms. In addition the chemical potential and the low-lying excitation levels of each cluster are determined with high precision. These calculations reveal that the “magic numbers” observed in experimental math cluster size distributions, measured for free jet gas expansions by nondestructive matter-wave diffraction, are not caused by enhanced stabilities. Instead they are explained in terms of an enhanced growth due to sharp peaks in the equilibrium concentrations in the early part of the expansion. These peaks appear at cluster sizes which can just accommodate one more additional stable excitation. The good agreement with experiment provides not only experimental confirmation of the energy level and the chemical potential calculations, but also evidence for a new mechanism which can lead to magic numbers in cluster size distributions. By accounting for the falloff of the radial density distributions at the surface and a size-dependent surface tension, the energy levels are demonstrated to be consistent with a modified Rayleigh model of surface excitations. The compressibility coefficient of these small clusters is found to be one order of magnitude smaller than the bulk compressibility. en
dc.language.iso en en
dc.subject Helium neutral atoms ; Atomic clusters ; Ground states ; Excited states ; Chemical potential ; Diffusion ; Monte Carlo methods ; Molecular configurations en
dc.title Magic numbers, excitation levels, and other properties of small neutral math clusters (N < 50) en
dc.type journal article es_ES
dc.subject.unesco UNESCO::FÍSICA::Química física en
dc.identifier.doi 10.1063/1.2140723 en
dc.type.hasVersion VoR es_ES
dc.identifier.url http://scitation.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=JCPSA6000124000008084307000001&idtype=cvips&prog=normal&doi=10.1063/1.2140723 en

Visualització       (540.1Kb)

Aquest element apareix en la col·lecció o col·leccions següent(s)

Mostra el registre parcial de l'element

Cerca a RODERIC

Cerca avançada

Visualitza

Estadístiques