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High-speed video is used to analyze the pinch-off of xenon in water. By varying the pressure in the xenon from 0.05 to 68 atm, the mass density ratio D=ρᵢₙₜ/ρₑₓₜ of the interior gaseous xenon ρᵢₙₜ to the exterior liquid water ρₑₓₜ can be varied by over 3 orders of magnitude. Both the shape of the pinch region and the power law that governs the collapse of the minimum neck radius are distinctly different for the low D (bubblelike) and high D (dropletlike) cases. We show that there is a rather abrupt transition between these types of behavior near D≈0.25.
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Burton et al. (2008) studied this question.
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