Calculations are presented of the wetting properties of liquid hydrogen films on various substrates. The well depth D for the adsorption potential is even smaller for alkali metal substrates than for noble gas surfaces. A simple model calculation leads to the prediction that wetting transitions should then occur at a temperature T(w) about 20 K. Quartz microbalance data obtained for H-2 on Rb are consistent with this result. Specifically, T(w) is found to be 17.89 +/- 0.04 K. The wetting phase diagram is found to be in good agreement with thermodynamic expectations.
Wetting transitions of liquid hydrogen films
MISTURA, GIAMPAOLO;TOIGO, FLAVIO
1993
Abstract
Calculations are presented of the wetting properties of liquid hydrogen films on various substrates. The well depth D for the adsorption potential is even smaller for alkali metal substrates than for noble gas surfaces. A simple model calculation leads to the prediction that wetting transitions should then occur at a temperature T(w) about 20 K. Quartz microbalance data obtained for H-2 on Rb are consistent with this result. Specifically, T(w) is found to be 17.89 +/- 0.04 K. The wetting phase diagram is found to be in good agreement with thermodynamic expectations.File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
