In reply to Jones Beene's message of Sat, 1 Jun 2013 19:35:11 -0700:
Hi,
[snip]
>-----Original Message-----
>From: mix...@bigpond.com
>
>Hi Robin,
>
>>> The H2 is of course f/H molecules.
>
>> Still three body reactions - no way
>
>>> No, these are all two body reactions, because the f/H is bound in a
>pico/femto molecule, and approaches the target nucleus as a single
>(composite) entity.
>
>
>What is the separation distance between the two protons?
That depends on the model. In mine, it can be as small as a few fm.
>They may be
>relatively close, but it is hard to imagine that this is not three body.
Three body reactions are usually rare, because it is unlikely that all three
bodies will be in the same place at the same time. However if two of the three
are already bound together, and hence guaranteed to both be present, then the
chances are the same as for a two body reaction.
>Why
>are spallation neutrons not produced?
The energy needed to remove a neutron for each of the isotopes is:
64Ni: 9.66 MeV
62Ni: 10.6 MeV
60Ni: 7.82 MeV
58Ni: 12.217 MeV
For the three reactions:
64Ni + H2 => 62Ni + 4He + 11.8 MeV ("no" gammas)
62Ni + H2 => 60Ni + 4He + 9.88 MeV ("no" gammas)
60Ni + H2 => 58Ni + 4He + 7.9 MeV ("no" gammas)
there isn't a lot of difference between the energy of the alphas and the
spallation energy, which means that such an alpha has to get really "lucky" and
hit a Ni nucleus close to where it was formed, before it loses too much energy
ionizing other atoms. Since very few will be so lucky, few spallation neutrons
will be created. BTW note also that alphas and other nuclei are both positively
charged, so they repel one another making direct hits even more unlikely.
Note also that *pure* 62Ni isn't capable of creating any at all
(9.88 MeV < 10.6 MeV). However once a significant amount of 60Ni had
accumulated, it would be able to. OTOH, the 60Ni may get gobbled up by the H2
reaction before any significant spallation could occur.
(Perhaps a reason for Rossi's patent application? ;)
So it doesn't look like neutron spallation is going to be much of a problem.
The proton spallation energy is:
64Ni: 12.55 MeV
62Ni: 11.14 MeV
60Ni: 9.53 MeV
58Ni: 8.17 MeV
Obviously not a problem for the top two. However for the bottom two it is
possible. Not a problem for 60Ni, because 59Co is stable, however 57Co is
radioactive.
Regards,
Robin van Spaandonk
http://rvanspaa.freehostia.com/project.html
