Spectrum
Posted by
JAC on 1/31/2010, 7:22 am
I found a more detailed presentation on the subject.
http://www.scribd.com/doc/19388723/Gamma-Rays-From-Lightning
A slide near the middle shows the spectrum of the TGF's.
It looks to be continuous to about 20MeV - very energetic.
However, it does not show a resonance peak at 1.022 MeV.
If electron - positron annihilation were occcuring, there would be a peak at that energy.
The continuous spectra suggests to me that this is a form of radiation that would occur if electrons were being accelerated or being slowed-down (bremsstralung).
That is a very powerful acceleration to get up to 20 MeV!
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