Dynamics of the formation of an electron bubble in liquid helium

Michael Rosenblit*, Joshua Jortner

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


The dynamics of excess electron localization in a bubble (equilibrium radius 17) in liquid He is described in terms of the initial formation of an incipient bubble of radius 3.5, followed by an adiabatic bubble expansion in the ground electronic state, which is described by a hydrodynamic model for the expansion of a spherical cavity in an incompressible liquid. The bubble expansion time at pressure P=0 in liquid He4 is b=3.9 ps; the expansion time exhibits a marked pressure dependence (e.g., b=1.5 ps at P=16 atm) and a small (3%) isotope effect in liquid He3. The interrogation of the electron bubble dynamics by femtosecond absorption spectroscopy is analyzed.

Original languageEnglish
Pages (from-to)4079-4082
Number of pages4
JournalPhysical Review Letters
Issue number22
StatePublished - 1995


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