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Title: Electron bubbles in liquid helium: Density functional calculations of infrared absorption spectra
Author: Grau, Víctor
Barranco Gómez, Manuel
Mayol Sánchez, Ricardo
Pi Pericay, Martí
Keywords: Líquids quàntics
Espectres d'absorció
Teoria del funcional de densitat
Dinàmica de fluids
Quantum fluids
Absorption spectra
Density functional theory
Fluid dynamics
Issue Date: 2006
Publisher: The American Physical Society
Abstract: Within density functional theory, we have calculated the energy of the transitions from the ground state to the first two excited states in the electron bubbles in liquid helium at pressures from zero to about the solidification pressure. For {sup 4}He at low temperatures, our results are in very good agreement with infrared absorption experiments. Above a temperature of {approx}2 K, we overestimate the energy of the 1s-1p transition. We attribute this to the break down of the Franck-Condon principle due to the presence of helium vapor inside the bubble. Our results indicate that the 1s-2p transition energies are sensitive not only to the size of the electron bubble, but also to its surface thickness. We also present results for the infrared transitions in the case of liquid {sup 3}He, for which we lack experimental data.
Note: Reproducció digital del document publicat en format paper, proporcionada per PROLA i
It is part of: Physical Review B, 2006, vol. 73, núm. 6, p. 064502-1-064502-8
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ISSN: 0163-1829
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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