Comments on: 340. Thermonuclear fusion: some basic facts about thermonuclear reactions

By: Thermonuclear fusion: list of posts | NEQNET: Non-equilibrium Phenomena

Thermonuclear fusion: list of posts | NEQNET: Non-equilibrium Phenomena — Wed, 29 Apr 2009 17:00:47 +0000

[...] Thermonuclear fusion: some basic facts about thermonuclear reactions, where I start explaining why such phenomenon as thermonuclear fusion can even take place in Nature [...]

By: NEQNET: first two weeks of April | NEQNET: Non-equilibrium Phenomena

NEQNET: first two weeks of April | NEQNET: Non-equilibrium Phenomena — Sat, 18 Apr 2009 19:21:51 +0000

[...] Thermonuclear fusion: some basic facts about thermonuclear reactions. Since I’ve included thermonuclear fusion in my list of 10 most important open problems in [...]

By: Arjen Dijksman

Arjen Dijksman — Sun, 12 Apr 2009 21:08:44 +0000

Thanks for that tip. I also found info in chapter 1 of Introduction to nuclear and particle physics, by Ashok Das.

I’ve been reading lately much early original work in electricty and magnetism pioneering (Franklin, Coulomb, Faraday, Orsted, Ohm, Maxwell, etc.) and watching some Walter Lewin lectures and other demos on web. I was intrigued by the fact that experiments on Coulomb repulsion were always done with negatively charged objects. I’ve not yet found any experiment on Coulomb repulsion with positive charges, older than Rutherford, Geiger and Marsden. So I was wondering if one has ever measured an undistorted Coulomb repulsion between positive charges. If not, it could be of interest to modelize proton-proton repulsion without starting from Coulomb interaction.

Greet,
Arjen

By: Dmitry

Dmitry — Sat, 11 Apr 2009 18:02:35 +0000

You are probably interested in some really old QM stuff (1930s) – check out the book “The completion of quantum mechanics” by Mehra & Rechenberg, p. 960 and further.

If you want to know more about tests of Coulomb interaction, you’ll have to increase projectile energy, so that particles become relativistic. There are corrections to Coulomb law that come from renormalization (basically effective charge is a slow function of r). This was checked in 1950s-1960s.

Cheers,
Dmitry.

By: Arjen Dijksman

Arjen Dijksman — Fri, 10 Apr 2009 16:01:09 +0000

I’ve been looking for papers with experiments with slow protons, showing how the Coulomb repulsion behaves increasing the energy. I couldn’t find some. Could you help? Thanks.

Greetings,
Arjen

By: Dmitry

Dmitry — Fri, 10 Apr 2009 14:56:50 +0000

Hi Arjen,

Is that Coulomb repulsion experimentally verified (for example with slow protons)?

Oh yes, and at much smaller distances too – like in experiments involving QED precision measurements.

So yes, what?s the procedure?

Sorry, I did not understand your question.

Cheers,
Dmitry.

By: Arjen Dijksman

Arjen Dijksman — Thu, 09 Apr 2009 20:14:39 +0000

Hello Dmitry,

The figure shows a nice smooth Coulomb repulsion curve for radius > 20 fm. Is that Coulomb repulsion experimentally verified (for example with slow protons)? So yes, what’s the procedure?

Kind regards,
Arjen

By: Thermonuclear fusion. Coulomb barrier and reaction rates | NEQNET: Non-equilibrium Phenomena

Thu, 09 Apr 2009 13:04:52 +0000

[...] This post is the next in the series devoted to the discussion of our main energy source in the 22 century – thermonuclear fusion [...]

By: Jed Rothwell

Jed Rothwell — Tue, 07 Apr 2009 22:13:02 +0000

Wikipedia is not a valid source of information about cold fusion. I suggest you read peer-reviewed journal papers and papers issued by Los Alamos, the U.S. Navy and BARC instead. See:

http://lenr-canr.org