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Experimental behaviour of ionic structures in liquid helium — II

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Il Nuovo Cimento (1955-1965)

Summary

Experiments have been performed to select a proper model among some proposed structures for helium ions in liquid helium. The apparatus is essentially a diode, where the ions are produced byα-rays and the currents can be measured in the bulk liquid, in the liquid-vapour interphase and in the bulk solid. By the quite different behaviour of the positive and negative ions in the interphase experiments one is led to picture the positive ion as a cluster of polarized atoms around one charge, and the negative ion as a large cage where the electron is self-trapping.

Riassunto

Sono stati eseguiti degli esperimenti per scegliere un modello adatto fra alcune strutture possibili per gli ioni di elio in elio liquido. L’apparecchio è essenzialmente un diodo, dove gli ioni sono prodotti da raggiα e le correnti possono essere misurate in fase liquida, solida e in interfase liquido-vapore. Tramite il differente comportamento degli ioni positivi e negativi negli esperimenti in interfase, si è portati a ritenere lo ione positivo come un raggruppamento di atomi polarizzati intorno ad una carica, e lo ione negativo come una cavità dove l’elettrone si auto-intrappola.

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References

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Careri, G., Fasoli, U. & Gaeta, F.S. Experimental behaviour of ionic structures in liquid helium — II. Nuovo Cim 15, 774–783 (1960). https://doi.org/10.1007/BF02732692

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  • DOI: https://doi.org/10.1007/BF02732692

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