🚀 go-pugleaf

In article <1ipr33INNkem@network.ucsd.edu> mbk@hamilton (Matt Kennel) writes:
>crb7q@kelvin.seas.Virginia.EDU (Cameron Randale Bass) writes:
>:      No, it is not a small jump.  There are clearly shock phenomena
>:      that involve ionization and dissociation, that upon species
>:      recombination can emit light.  To then postulate nuclear excitation
>:      from this is not a small leap at all, and the weak links are 
>:      basically nonexistent links.  
>: 
>:      As far as the photons, they appear to be locallized at the
>:      center of the bubble in 'stable cavitation'.  This would make sense
>:      if there were a strong shock-dissociation-recombination chain
>:      of events inside the vapour bubble.
>
>When I went to the UCLA lab a few months ago, Prof Putterman said that
>the light appeared to have a overall macroscopic polarization pattern,
>which you would not expect from independent atomic recombinations, but
>rather pointing towards some overall collective phenomenon.
>
>I don't know what more recent experimental results say.

    You've got me.  The most recent work I've seen is in PRL of
    28 December, received in September.  There seems to be no mention of
    polarization.  One of the difficult things about such 
    a measurement would seem to be the fact that the light comes
    through a shock and a phase discontinuity of currently unknown
    detailed properties.

                             dale bass
-- 
C. R. Bass                                          crb7q@virginia.edu        
Department of Mechanical, 
     Aerospace and Nuclear Engineering
University of Virginia                              (804) 924-7926