Density modes in spherical 4He shells

We compute the density-fluctuation spectrum of spherical 4HeN shells adsorbed on the outer surface of C n fullerenes. The excitation spectrum is obtained within the random-phase approximation, with particle-hole elementary excitations and effective interaction extracted from a density-functional des...

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Autor principal:	Hernández, Ester Susana
Publicado:	2004
Materias:	carbon fullerene helium article chemical structure density density functional theory elementary particle excitation geometry hydrodynamics mathematical analysis quantum mechanics
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01631829_v69_n13_p134502_Barranco http://hdl.handle.net/20.500.12110/paper_01631829_v69_n13_p134502_Barranco
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_01631829_v69_n13_p134502_Barranco
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spelling	paper:paper_01631829_v69_n13_p134502_Barranco2023-06-08T15:14:00Z Density modes in spherical 4He shells Hernández, Ester Susana carbon fullerene helium article chemical structure density density functional theory elementary particle excitation geometry hydrodynamics mathematical analysis quantum mechanics We compute the density-fluctuation spectrum of spherical 4HeN shells adsorbed on the outer surface of C n fullerenes. The excitation spectrum is obtained within the random-phase approximation, with particle-hole elementary excitations and effective interaction extracted from a density-functional description of the shell structure. The presence of one or two solid helium layers adjacent to the adsorbing fullerene is phenomenologically accounted for. We illustrate our results for a selection of numbers of adsorbed atoms on C20, C 60, and C120. The hydrodynamical model that has proven successful to describe helium excitations in the bulk and in restricted geometries permits to perform a rather exhaustive analysis of various fluid spherical systems, namely, spheres, cavities, free bubbles, and bound shells of variable size. Fil:Hernández, E.S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2004 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01631829_v69_n13_p134502_Barranco http://hdl.handle.net/20.500.12110/paper_01631829_v69_n13_p134502_Barranco
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	carbon fullerene helium article chemical structure density density functional theory elementary particle excitation geometry hydrodynamics mathematical analysis quantum mechanics
spellingShingle	carbon fullerene helium article chemical structure density density functional theory elementary particle excitation geometry hydrodynamics mathematical analysis quantum mechanics Hernández, Ester Susana Density modes in spherical 4He shells
topic_facet	carbon fullerene helium article chemical structure density density functional theory elementary particle excitation geometry hydrodynamics mathematical analysis quantum mechanics
description	We compute the density-fluctuation spectrum of spherical 4HeN shells adsorbed on the outer surface of C n fullerenes. The excitation spectrum is obtained within the random-phase approximation, with particle-hole elementary excitations and effective interaction extracted from a density-functional description of the shell structure. The presence of one or two solid helium layers adjacent to the adsorbing fullerene is phenomenologically accounted for. We illustrate our results for a selection of numbers of adsorbed atoms on C20, C 60, and C120. The hydrodynamical model that has proven successful to describe helium excitations in the bulk and in restricted geometries permits to perform a rather exhaustive analysis of various fluid spherical systems, namely, spheres, cavities, free bubbles, and bound shells of variable size.
author	Hernández, Ester Susana
author_facet	Hernández, Ester Susana
author_sort	Hernández, Ester Susana
title	Density modes in spherical 4He shells
title_short	Density modes in spherical 4He shells
title_full	Density modes in spherical 4He shells
title_fullStr	Density modes in spherical 4He shells
title_full_unstemmed	Density modes in spherical 4He shells
title_sort	density modes in spherical 4he shells
publishDate	2004
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01631829_v69_n13_p134502_Barranco http://hdl.handle.net/20.500.12110/paper_01631829_v69_n13_p134502_Barranco
work_keys_str_mv	AT hernandezestersusana densitymodesinspherical4heshells
_version_	1768542732271222784

Density modes in spherical 4He shells

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