- #1

oksuz_

- 70

- 3

Which force does govern the neutron elastic scattering and capture reactions? It seems to me it is the strong nuclear force, but I am not sure about that.

Thanks.

You are using an out of date browser. It may not display this or other websites correctly.

You should upgrade or use an alternative browser.

You should upgrade or use an alternative browser.

- I
- Thread starter oksuz_
- Start date

- #1

oksuz_

- 70

- 3

Which force does govern the neutron elastic scattering and capture reactions? It seems to me it is the strong nuclear force, but I am not sure about that.

Thanks.

- #2

mfb

Mentor

- 36,292

- 13,366

- #3

oksuz_

- 70

- 3

Do you have any resources in mind that you can suggest to me about the theory behind these interactions? I want to get some theoretical understanding of calculating these reactions' interaction cross-sections.

- #4

mathman

Science Advisor

- 8,100

- 559

- #5

oksuz_

- 70

- 3

Elastic scattering is an ordinary collision.

In the macroscopic world, ordinary elastic scattering is governed by the electromagnetic force. Since neutron is an uncharged particle, it cannot be the electromagnetic force. It cannot the gravitational force either. It should be either the strong or weak nuclear force. So, which one?

- #6

mfb

Mentor

- 36,292

- 13,366

Yes, mediated by the strong interaction.Elastic scattering is an ordinary collision.

- #7

Vanadium 50

Staff Emeritus

Science Advisor

Education Advisor

- 29,918

- 15,597

Since neutron is an uncharged particle, it cannot be the electromagnetic force.

It's not primarily the EM force, yes, but that argument is not valid. The neutron has a magnetic moment and can interact electromagnetically that way.

- #8

oksuz_

- 70

- 3

It's not primarily the EM force, yes, but that argument is not valid. The neutron has a magnetic moment and can interact electromagnetically that way.

Thanks! I missed that part.

Can you tell quantitatively what is the fraction of the interaction level that comes from the EM force compared to the strong force?

- #9

mathman

Science Advisor

- 8,100

- 559

- #10

snorkack

- 1,958

- 394

Neutrons can undergo elastic scattering by strong force (off hadrons).

There are particles not subject to strong force (and not identical to neutrons, so no exchange force either).

Photons are subject to neither strong nor weak forces. But they have electromagnetic forces. Neutron has no electric monopole charge. But does have a nonzero magnetic dipole moment. Therefore photons should have a nonzero but modest cross-section of elastic scattering from neutrons.

Gravitons are subject to gravitational forces alone, but neutrons have mass, therefore elastic scattering of gravitons off neutrons must have a nonzero but modest cross-section.

Neutrinos are subject to neither strong nor electromagnetic forces, but do have weak forces. Therefore elastic scattering of neutrinos off neutrons must have a nonzero but modest cross-section.

Electrons are not subject to strong forces but have both electromagnetic and weak forces. Therefore both electromagnetic interaction between electron charge and neutron magnetic dipole moment and weak interaction must contribute to cross-section of elastic scattering between neutrons and electrons.

- #11

mathman

Science Advisor

- 8,100

- 559

- #12

snorkack

- 1,958

- 394

Share:

- Last Post

- Replies
- 7

- Views
- 1K

- Replies
- 5

- Views
- 678

- Replies
- 28

- Views
- 640

- Last Post

- Replies
- 2

- Views
- 641

- Replies
- 28

- Views
- 513

- Last Post

- Replies
- 6

- Views
- 2K

- Last Post

- Replies
- 5

- Views
- 1K

- Replies
- 1

- Views
- 1K

- Last Post

- Replies
- 9

- Views
- 1K

- Last Post

- Replies
- 15

- Views
- 1K