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- Path: sparky!uunet!psgrain!hippo!ucthpx!uctvax.uct.ac.za!hndcol02
- From: hndcol02@uctvax.uct.ac.za (Colin Henderson, Physics Dept. UCT)
- Newsgroups: sci.physics.fusion
- Subject: <None>
- Message-ID: <1992Jul30.100950.202158@uctvax.uct.ac.za>
- Date: 30 Jul 92 10:09:50 +0200
- References: <29JUL199212110773@lims01.lerc.nasa.gov>
- Distribution: world
- Organization: University of Cape Town
- Lines: 49
-
- In article <29JUL199212110773@lims01.lerc.nasa.gov>, edwlt12@lims01.lerc.nasa.gov (MIKE JAMISON) writes:
- > While thinking about the Ying device, and how to exploit its effect without
- > the continuous use of a gamma source (i.e. making a gamma ray laser), I was
- > struck by the following thought:
- >
- > 1) If D+D+gamma -> He4+2gamma exists, then:
- >
- > 2) (your favorite gamma source)+gamma -> fragments + 2gamma
- >
- > should also exist.
- >
- > In other words, if gamma induced fusion exists, then gamma induced fission
- > should also exist.
- >
- > Conversely, if gamma induced fission doesn't exist, then gamma induced
- > fusion won't, either.
-
- I don't think conventional theories of nuclear physics follow this
- logic! :-)
-
- Gamma induced fission does indeed exist - for a start in deuterium
- itself. If you hit a deuteron with a gamma of greater than its binding
- energy, (2.2 MeV), it will photodisintegrate. Same goes for any
- nucleus. No one has yet been able to do the opposite - e.g. fire a
- gamma at two nucleons (neutron and proton) and see them fuse. It's
- completely counterintuitive. Like putting a stick of dynamite between
- two rocks and expecting the explosion to make them stick together.
-
- The only way I can see the Ying scenario working is if the gamma
- somehow gives a deuteron kinetic energy (maybe momentum is absorbed
- by the lattice for conservation purposes) and that deuteron goes
- shooting off and hits another deuteron. I, however, remain entirely
- sceptical of this. If a 24 MeV gamma hits a deuteron, you get protons
- and neutrons. If a 1.5 MeV gamma hits a deuteron, it excites it.
-
- As far as chain reactions go, I agree that to explain the supposed
- Ying effect, you need one, but you can't get one without trashing
- nuclear physics. Fusion is not like fission. In fact, it's quite the
- opposite :-)
-
- I'm finding the statistical and thermondynamical reatment of nucl phys
- very interesting. Hitherto I've been strictly a ball-and-chain man.
-
- --
- Colin Henderson
- Physics Dept, UCT, Cape Town, South Africa.
- colin@physci.uct.ac.za
-
- ------------------natural selection favours paranoia!-------------------
-