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Press Release 05-030
A Bubble Full of Sunshine

Temperatures inside bursting bubbles can be four times hotter than the Sun

A bubble grows and collapses due to ultrasound

A bubble's growth and collapse.
Credit and Larger Version

March 3, 2005

Chemists at the University of Illinois have determined that temperatures inside gas bubbles collapsing in a liquid reach roughly 20,000 degrees Kelvin—four times hotter than the surface of the Sun. They made the discovery by blasting the liquid with intense sound waves and measuring "sonoluminescence," the light emitted from the bubbles as they form and collapse. According to the researchers, it is the first time anyone has measured the temperature inside a single collapsing bubble.

Their work was supported by the National Science Foundation and the Defense Advanced Research Projects Agency, and published in the March 3, 2005, issue of the journal Nature.

For further information, see the University of Illinois news release.

-NSF-

Media Contacts
M. Mitchell Waldrop, NSF, (703) 292-8070, mwaldrop@nsf.gov
James E. Kloeppel, University of Illinois, Urbana-Champaign, 217-244-1073, kloeppel@uiuc.edu

Principal Investigators
Kenneth Suslick, University of Illinois, Urbana-Champaign, (217) 333-2794, ksuslick@uiuc.edu

Related Websites
The Kenneth Suslick Laboratory at UIUC: http://www.scs.uiuc.edu/suslick/index.html
Earlier NSF press release about the Illinois work: http://www.nsf.gov/od/lpa/news/02/pr0263.htm

The National Science Foundation (NSF) is an independent federal agency that supports fundamental research and education across all fields of science and engineering. In fiscal year (FY) 2014, its budget is $7.2 billion. NSF funds reach all 50 states through grants to nearly 2,000 colleges, universities and other institutions. Each year, NSF receives about 50,000 competitive requests for funding, and makes about 11,500 new funding awards. NSF also awards about $593 million in professional and service contracts yearly.

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For the News Media: http://www.nsf.gov/news/newsroom.jsp
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