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References in periodicals archive ?
In the past, spectra of sonoluminescence flashes in single bubbles had revealed little, in part because the bubbles may have contained too many atoms and molecules of different energies to allow any discernible sign of a plasma to come through, says Suslick.
In the new work, Taleyarkhan and his collaborators used bursts of neutrons to fabricate clouds of short-lived, but extraordinarily large, sonoluminescence bubbles in acetone, the solvent in many nail-polish removers.
Sonoluminescence results from cavitation--bubble formation in a liquid when its pressure dips below that at which the liquid would ordinarily vaporize, permitting the microscopic gas bubbles already present to expand.
Known as sonoluminescence, this conversion of sound into light occurs during the rapid, violent contraction of a bubble as it oscillates in step with the sound wave (SN: 10/5/96, p.
Known as sonoluminescence, this conversion of sound into light occurs during the rapid and violent contraction of the bubble as it oscillates in step with the sound wave (SN: 4/29/95, p.
Finally, sonoluminescence may produce light when microscopic bubbles in the hot fluid collapse.
The prospect of carrying out chemical reactions at temperatures hotter than the sun has driven scientists to explore the process known as sonoluminescence (SN: 04/29/95, p.
Making light from sound, known as sonoluminescence, has generated a whirl of activity among some scientists in recent years.
Although researchers have known about this effect -- called sonoluminescence -- since the 1930s, they still do not have a complete understanding of how it works (SN: 10/23/93, p.
Aside from black-body radiation, they listed a number of other possible sources of illumination: crystalloluminescence, produced when chemicals crystallize; sonoluminescence, powered by the sound of bubbles collapsing; triboluminescence, created when rock crystals crack; and Cerenkov radiation and scintillation, both caused by the radioactive decay of elements in the vent water.
Researchers have known about this pehnomenon, called sonoluminescence, for more than 50 years, but they have yet to come up with a complete, convincing explanation of how the temporary collapse of a bubble can concentrate the energy of a sound wave more than a trillion times and excite atoms and molecules into producing light (SN: 5/11/92, p.
Researchers have known about sonoluminescence -- the conversion of sound energy into light by acoustically driven gas bubbles -- for more than 50 years.