In reply to  Jed Rothwell's message of Mon, 21 May 2018 11:00:54 -0400:
>Russ <> wrote:
>Might you point to a reference where the mass of neutrons in deuterium vs.
>> other nuclides is said to be different.
>I do not understand. Is the claim here that a neutron in deuterium is
>heavier or lighter than a neutron in some other element?

Yes (heavier), that's what I'm suggesting.

> There are
>different kinds or neutrons, or entering deuterium changes the mass?

The latter. The energy release from the nuclear reaction has to came from
somewhere. I am simply saying that it comes from the conversion of part of the
mass of the constituent particles.

>That seems extremely unlikely to me.

Then you need to explain where the fusion energy comes from. (I'm counting
addition of a neutron to a nucleus as a form of fusion).

Note that the formation of D from a free proton & a free neutron releases only
2.2 MeV of energy whereas at the other extreme, addition of a neutron to a Ni
nucleus releases about 8 MeV of energy. Hence my conclusion that neutrons in Ni
have lower mass than those in D.


Robin van Spaandonk

local asymmetry = temporary success

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