scholarly journals Electron bubbles in liquid helium: Density functional calculations of infrared absorption spectra

2006 ◽  
Vol 73 (6) ◽  
Author(s):  
Víctor Grau ◽  
Manuel Barranco ◽  
Ricardo Mayol ◽  
Martí Pi
Keyword(s):  
Liquid Helium ◽  
Absorption Spectra ◽  
Infrared Absorption ◽  
Density Functional Calculations ◽  
Density Functional ◽  
Electron Bubbles ◽  
Infrared Absorption Spectra

INFRARED-ABSORPTION SPECTRUM OF ELECTRON BUBBLES IN LIQUID HELIUM

2006 ◽  
Vol 20 (30n31) ◽  
pp. 5291-5300 ◽  
Author(s):  
M. PI ◽  
M. BARRANCO ◽  
V. GRAU ◽  
R. MAYOL
Keyword(s):  
Liquid Helium ◽  
Excited States ◽  
Infrared Absorption ◽  
Density Functional ◽  
Infrared Absorption Spectrum ◽  
Functional Theory ◽  
Electron Bubbles ◽  
Transition Energies ◽  
Solidification Pressure ◽  
Good Agreement

Within finite temperature 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 4 He at low temperatures, our results are in very good agreement with infrared absorption experiments. We have found 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 3 He .

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