Sonoluminescence light emission
نویسندگان
چکیده
منابع مشابه
Sonoluminescence light emission
Single bubble sonoluminescence is not an exotic phenomenon but can quantitatively be accounted for by applying a few well-known, simple concepts: the Rayleigh–Plesset dynamics of the bubble’s radius, polytropic uniform heating of the gas inside the bubble during collapse, the dissociation of molecular gases, and thermal radiation of the remaining hot noble gas, where its finite opacity ~transpa...
متن کاملTheory of light emission in sonoluminescence as thermal radiation.
Based on the model proposed by Hilgenfeldt [Nature (London) 398, 401 (1999)], we present here a comprehensive theory of thermal radiation in single-bubble sonoluminescence (SBSL). We first invoke the generalized Kirchhoff's law to obtain the thermal emissivity from the absorption cross section of a multilayered sphere (MLS). A sonoluminescing bubble, whose internal structure is determined from ...
متن کاملResponse to ‘ ‘ Comment on ‘ Sonoluminescence light emission ’ ’ ’ † Phys . Fluids 12 , 472 „ 1999 ... ‡
In their Comment, Hammer and Frommhold check the validity of the results in the original publication by comparing the approximate calculations found therein to their ab initio, quantum mechanical formalism. Overall, both computational methods yield similar results, which validates the assumptions about the principal physical processes involved in SBSL light emission ~electron–ion and electron–n...
متن کاملArgon rectification and the cause of light emission in single-bubble sonoluminescence.
In single-bubble sonoluminescence, repeated brief flashes of light are produced in a gas bubble strongly driven by a periodic acoustic field. A startling hypothesis has been made by Lohse and co-workers [Phys. Rev. Lett. 78, 1359 (1997)] that the non-noble gases in an air bubble undergo chemical reaction into soluble products, leaving only argon. In the present work, this dissociation hypothesi...
متن کاملSonoluminescence: How Bubbles Turn Sound into Light
Sonoluminescence, the transduction of sound into light, is a phenomenon that pushes fluid mechanics beyond its limit. An initial state with long wavelength and low Mach number, such as is realized for a gas bubble driven by an audible sound field, spontaneously focuses the energy density so as to generate supersonic motion and a different phase of matter, from which are then emitted picosecond ...
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ژورنال
عنوان ژورنال: The Journal of the Acoustical Society of America
سال: 1999
ISSN: 0001-4966
DOI: 10.1121/1.424878