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Title: Bubble formation and decay in 3He and 4He clusters.
Authors: von Haeften, Klaus
Laarmann, Tim
Wabnitz, Hubertus
Möller, Thomas
First Published: 10-Jun-2002
Publisher: American Physical Society.
Citation: Physical Review Letters, 2002, 88 (23), pp.233401-1 - 233401-4.
Abstract: The energy transfer in 3He and 4He clusters electronically excited by monochromatic synchrotron radiation is investigated by luminescence spectroscopy. Depending on the cluster size and the isotopic constitution, either sharp, broadened, or shifted emission bands of single He molecules are observed. The spectral features show that He molecules emit light either within a bubble inside the cluster or in the vacuum after desorption from the cluster. From the luminescence intensity, the cluster diameter, and the radiative lifetime, an average velocity of ~7 m/s of bubbles in 4He clusters could be deduced. In the nonsuperfluid 3He clusters this velocity was observed to be significantly lower.
Type: Article
Description: This is the version as published by the American Physical Society and available through their website
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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