In:
The Journal of Chemical Physics, AIP Publishing, Vol. 106, No. 8 ( 1997-02-22), p. 3348-3357
Abstract:
Droplets formed in 4He free jets expanded from source stagnation states in the vicinity of the critical point (Tc=5.2 K, Pc=2.3 bar) are investigated using a mass-spectrometer time-of-flight (TOF) technique. Depending on the source conditions, three different TOF peaks are identified: (a) atoms, (b) droplets formed by condensation from the gas phase, and (c) droplets formed by disintegration of the liquid phase. The latter show the lowest ever observed 4He cluster speeds, about 50 m/s, at a source pressure of 1.5 bar and a source temperature of 4–5 K, just below the critical pressure and temperature. The TOF distributions at the critical point are very broad and this may be due to critical-point fluctuations during the averaging period (2–10 min) of the individual measurements.
Type of Medium:
Online Resource
ISSN:
0021-9606
,
1089-7690
Language:
English
Publisher:
AIP Publishing
Publication Date:
1997
detail.hit.zdb_id:
3113-6
detail.hit.zdb_id:
1473050-9
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