Logan Kearsley wrote:
> Of course there is- neutrinos can do damage to your body by
> transmuting the elements it's made of. You just need a stupidly huge
> flux of neutrinos to get a noticeable effect, since absorption is so
> low. If you were unlucky enough to be orbiting a star about to go
> supernova, for example, the neutrino emissions would probably kill you
> before anything else, seeing as how they can escape the core fairly
> directly.
Yes, various calculations of the LD50 distance for a type II supernova
put it at about ~1-10 au. Given that the neutrino pulse of is about
10^46 J, that puts the LD50 energy (not power) flux at about
~10^21-10^23 J/m^2.
> An eva****ating micro-blackhole ought to do the trick.
Not sure about that; as a primordial black hole shrinks, its temperature
(and radiation power) rises, which means that the spectrum of radiation
(including which type of particles) cycles through "heavier" types of
radiation. A black hole on the verge of eva****ation would likely be
emitting the vast majority of its energy in radiation types other than
neutrinos. Whether they'd still be enough total radiation to compensate
for the ****ft isn't clear to me.
Though given the original poster's premise, it sounded like he was
talking about a magical particle that would break all technology, rather
than kill all humans.
--
Erik Max Francis && max@[EMAIL PROTECTED]
&& http://www.alcyone.com/max/
San Jose, CA, USA && 37 18 N 121 57 W && AIM, Y!M erikmaxfrancis
Success and failure are equally disastrous.
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