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Article Dans Une Revue Physical Review Letters Année : 2008

Evidence for nanoparticles in microwave-generated fireballs observed by synchrotron X-ray scattering

Brian J.B.A. Mitchell
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Jean-Luc Le Garrec
Michael Sztucki
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Eli Jerby
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Résumé

The small-angle x-ray scattering method has been applied to study fireballs ejected into the air from molten hot spots in borosilicate glass by localized microwaves [V. Dikhtyar and E. Jerby, Phys. Rev. Lett. 96 045002 (2006)10.1103/PhysRevLett.96.045002]. The fireball's particle size distribution, density, and decay rate in atmospheric pressure were measured. The results show that the fireballs contain particles with a mean size of approximately 50 nm with average number densities on the order of approximately 10(9). Hence, fireballs can be considered as a dusty plasma which consists of an ensemble of charged nanoparticles in the plasma volume. This finding is likened to the ball-lightning phenomenon explained by the formation of an oxidizing particle network liberated by lightning striking the ground [J. Abrahamson and J. Dinniss, Nature (London) 403, 519 (2000)10.1038/35000525].
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Dates et versions

hal-00671064 , version 1 (16-02-2012)

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Brian J.B.A. Mitchell, Jean-Luc Le Garrec, Michael Sztucki, Theyencheri Narayanan, Vladimir Dikhtyar, et al.. Evidence for nanoparticles in microwave-generated fireballs observed by synchrotron X-ray scattering. Physical Review Letters, 2008, 100 (6), pp.065001. ⟨10.1103/PhysRevLett.100.065001⟩. ⟨hal-00671064⟩
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