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- Newsgroups: sci.physics.fusion
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!wupost!usc!sdd.hp.com!mips!darwin.sura.net!cs.ucf.edu!news
- From: long@next1.acme.ucf.edu (Richard Long)
- Subject: Re: DD->4He + gamma
- Message-ID: <1992Jul30.161013.12714@cs.ucf.edu>
- Sender: news@cs.ucf.edu (News system)
- Organization: University of Central Florida
- References: <199207300852.AA20319@ames.arc.nasa.gov>
- Date: Thu, 30 Jul 1992 16:10:13 GMT
- Lines: 35
-
- In article <1992Jul30.131601.20968@usenet.ins.cwru.edu>
- rpetsche@mrg.tmc.edu (Rolfe G. Petschek) writes:
- > In article <weRiXuK00UhW04InRD@andrew.cmu.edu> pk03+@andrew.cmu.edu
- (Paul Karol) writes:
- >
- > >Bruce Scott also guesses that D + D --> He-4 violates some quantum
- > >selection rule, but I do not believe that is the case.
- >
- > d is spin 1
- > He is spin 0
- > gammas are spin 1
-
- I believe that both d and He4 can have different total spins than those
- listed; however, this requires some energy. In the case of d, alligned
- spins have a lower energy than opposite spins, and so spin zero is
- possible if the deuteron is excited by a photon. The same is true of He4,
- although the energy is very much greater since all of the nuclear shells
- are filled for both neutrons and protons, and so one must go to a whole
- new shell and leave the other with a vacancy crying to be filled. Thus,
- we can rule out spin 1 He4, but spin zero d is certainly a possibility.
-
- If a spin zero d fuses with a spin 1 d to give a spin zero He4 and a spin
- 1 gamma, then we have reaction that does not violate spin or momentum.
- Is it possible to stimulate deuterium with low energy gammas to produce
- spin zero d? Are there any other mechanisms to forbid this kind of
- reaction, such as the nuclear forces which interchange protons and
- neutrons in the d nucleus. Does the strong force require alligned spins
- in d?
- --
- Richard Long
- Institute for Simulation and Training
- University of Central Florida
- 12424 Research Parkway, Suite 300, Orlando, FL 32826
- (407)658-5026, FAX: (407)658-5059
- long@acme.ucf.edu
-