From: Anders Sandberg (asa@nada.kth.se)
Date: Fri Aug 15 2003 - 16:17:24 MDT
On Fri, Aug 15, 2003 at 01:03:49PM -0400, John K Clark wrote:
> "Christian Weisgerber" <naddy@mips.inka.de> Wrote:
>
> > 1. The effects of gamma irradition drop with the distance.
>
> Not all forms of radiation decrease according to the inverse square law,
> Laser beams don't.
Diffraction and dispersion still gets them. Besides, the isomer bomb
would likely not be very directional (my guess is that you could get
some neat lobes).
100 keV gamma beams have a half-distance of 35 m of air absorbtion. The
intensity also gets diluted by the 1/r^2 if the bomb is not a
beam-source. My guess is that most of the energy does end up within a
few tens of meters around the bomb, producing at least a weak fireball.
-- ----------------------------------------------------------------------- Anders Sandberg Towards Ascension! asa@nada.kth.se http://www.nada.kth.se/~asa/ GCS/M/S/O d++ -p+ c++++ !l u+ e++ m++ s+/+ n--- h+/* f+ g+ w++ t+ r+ !y
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