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- Newsgroups: sci.physics.fusion
- Path: sparky!uunet!munnari.oz.au!metro!seagoon.newcastle.edu.au!cc.newcastle.edu.au!medb
- From: medb@cc.newcastle.edu.au (Dieter Britz)
- Subject: Why Ying?
- Message-ID: <1992Jul23.182537.1@cc.newcastle.edu.au>
- Lines: 38
- Sender: news@seagoon.newcastle.edu.au
- Organization: University of Newcastle, AUSTRALIA
- Date: Thu, 23 Jul 1992 08:25:37 GMT
-
- Something bothers me about the Ying experiment. I'm just a humble
- electrochemist, so maybe some physics expert out there can enlighten me:
- The Ying theory says, correctly, that one of the branches of d-d fusion is
- d + d --> (4)He + gamma (23.x MeV); this is in fact the controversial minor
- branch, with a probability of 1E-07 times the other two, with the infamous
- 50:50 branching ratio, yielding neutrons or tritium. OK. Ying now proposes
- to enhance this minor branch by tickling it with gamma rays at just that
- energy, 23.x MeV.
-
- I understand that quantum physics is not like chemistry but I still can't
- shake the thought that this is the wrong way around. In chemistry, if you
- have a reaction like
-
- A + B + C + ... ---> O + P + Q + ...
-
- then if you add, to a mixture of all these, one of the products O, P, Q ...,
- you drive the reaction backwards. This is Le Chatelier's Principle, and we
- understand it today in terms of thermodynamics, equilibrium constants etc.
- Looked at in this light, it would seem to me that if you shoot gammas at PdD,
- you'd squash even that tiny branch producing (4)He, and get even less fusion.
- Where am I going wrong? How can the gammas pull the branch out of probability
- space?
-
- Why, in fact, should this enhance the fusion rate? The way I think it works is
- that two d's decide to fuse (at some astronomically small rate [if you can have
- something astronomically small] or, if you believe Jones+, a very small but
- measurable rate of about 1E-21 fusions/d-d pair/s), and they first go into an
- excited intermediate state, from which there are certain probabilities for then
- exiting into one of the three branches. If the gamma rays shot at the target
- were (against my gut feeling) to enhance the (4)He branch, then you still would
- not get a fusion rate larger than the original one.
-
- So please, experts, explain these points. Frankly, it sounds like a lot of
- garbage to me. Ah, that feels better.
-
- Dieter alias medb@cc.newcastle.edu.au
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