Infrared spectrum of the electron bubble in liquid helium

Grimes, C. C.; Adams, Gregory W.

doi:10.1103/physrevb.41.6366

Cited by 146 publications

(83 citation statements)

References 22 publications

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“…24) The data of Grimes and Adams 21,23) for the transition energy as a function of pressure are included in Fig. 6.…”

Section: Excited States and Optical Transitionsmentioning

confidence: 99%

“…It is hard to have a high density of electron bubbles because even in the absence of an applied electric field, the space charge drives the electrons to the walls of the cell. The first measurements [18][19][20][21] did not measure the absorption directly. It was discovered that when electron bubbles were illuminated with light of the correct wavelength to excite the electron, there was a change in the mobility of the bubbles.…”

Section: Excited States and Optical Transitionsmentioning

confidence: 99%

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Electrons in Liquid Helium

Maris

2008

J. Phys. Soc. Jpn.

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An electron injected into liquid helium forces open a small cavity that is free of helium atoms. This object is referred to as an electron bubble, and has been studied experimentally and theoretically for many years. At first sight, it would appear that because helium atoms have such a simple electronic structure and are so chemically inert, it should be very easy to understand the properties of these electron bubbles. However, it turns out that while for some properties theory and experiment are in excellent quantitative agreement, there are other experiments for which there is currently no understanding at all.

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“…24) The data of Grimes and Adams 21,23) for the transition energy as a function of pressure are included in Fig. 6.…”

Section: Excited States and Optical Transitionsmentioning

confidence: 99%

Section: Excited States and Optical Transitionsmentioning

confidence: 99%

Electrons in Liquid Helium

Maris

2008

J. Phys. Soc. Jpn.

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“…Collecting the previous expressions (3,4,5,6) for the different energy contributions leads to the following expression for the Lagrangian L bubble = T − σS−pV−U C :…”

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confidence: 99%

Effect of Pressure on Statics, Dynamics, and Stability of Multielectron Bubbles

2001

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The effect of pressure and negative pressure on the modes of oscillation of a multi-electron bubble in liquid helium is calculated. Already at low pressures of the order of 10-100 mbar, these effects are found to significantly modify the frequencies of oscillation of the bubble. Stabilization of the bubble is shown to occur in the presence of a small negative pressure, which expands the bubble radius. Above a threshold negative pressure, the bubble is unstable.Typeset using REVT E X 1

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“…Similar discrepancies with numerical values occur in the problem of structural resonances for bubble-quasiparticles currently providing the only example of clusters where excitation with external field was realized (internal photo-transitions for electron in the bubble) [19]. Available calculations of the frequencies of electron transitions assume the spherical potential barrier confining the electron to the bubble to be stationary (fixed).…”

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confidence: 86%

Dynamic phenomena of charged clusters in cryogenic liquids

Chikina

Nazin

Shikin

2011

Low Temperature Physics

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Discussed in the paper are resonance phenomena in electrolytes related to possible relative motion of the charged core and hydrate (solvate) shell of each cluster. The resonances are shown to contain important information on the internal structure of clusters. Special attention is paid to the process of formation of the cluster associated mass in the solvent.PACS: 66.10.-x Diffusion and ionic conduction in liquids; 66.10.Ed Ionic conduction.Keywords: diffusion and ionic conduction in liquids.The problem of solvent inhomogeneity in the vicinity of point-like charges important for most effects involving various charged clusters is one of the tasks very poorly treated in the theory of electrolytes. Its quantum-chemical treatment (e.g., see Refs. 1 and 2) employing concepts of the first and next coordination spheres around the charged center and predicting complete or partial solvent crystallization there the hydration (solvation) effect only approximately accounts for the role of external environment in cluster formation. Current microscopic theories [3,4] providing detailed description of the short-range order in the structure of a homogeneous liquid do not work within the local density enhancement ( ) r δρ around the ion. The existent experimental techniques allow as a rule to obtain only integral characteristics of the cluster (e.g., hydration (solvation) energy in the thermodynamics of electrolytes [1,2]) or lackluster data on effective masses of charged clusters derived from ultrasonic measurements [5,6]. In these extremely adverse for development of appropriate theory conditions (strong interaction between the particles inside the polaron, substantial spatial inhomogeneity, lack of firmly established experimental data) it is natural to search for additional sources of information capable of elucidating the cluster structure. Considered in the present paper is one of the approaches in that direction which has not yet been discussed in the literature. The idea is to consider the resonances (which we call the structure resonances) arising in the course of relative motion of the core ion and the adjacent neutral shell of the charged cluster. It should be emphasized that, in our opinion, the very concept of structure resonances has already been dealt with in experiments on charged nanodroplets [7][8][9][10]. By employing the technique allowing to produce extremely small droplets (containing a few water molecules: 1, 2, 3 … whose number is measured in mass-spectrometer experiments) and charging them with single protons, the authors of Refs. 7-10 observed excitation of droplets in external high-frequency field and calculated the observed resonance frequencies with the first-principles methods employing the molecular dynamics technique. Yielding the numbers which are consistent with available experimental data, this approach tells practically nothing on physics of observed phenomena. Under these conditions our purpose is not only transferring the ideas of Refs. 7-10 to clusters in liquid; here the problem is less pro...

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Infrared spectrum of the electron bubble in liquid helium

Cited by 146 publications

References 22 publications

Electrons in Liquid Helium

Electrons in Liquid Helium

Effect of Pressure on Statics, Dynamics, and Stability of Multielectron Bubbles

Dynamic phenomena of charged clusters in cryogenic liquids

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