Forces Inside the Nucleus

"Why don't the

protons in a nucleus

fly apart?"

Don't likes repel?"

School Blocks YouTube? Use the file below.

| Fission_and_Fusion.mov |

"How can you possibly
learn about the parts of a nucleus when it's so small that you can't
even see it with
a microscope?"

Forces Inside Nucleus

1) Strong Nuclear Force

(A.K.A. 'strong force')

• Holds Nucleus Together - very strong, short range

• operates at distance < 10^-13 m

Two H nuclei fuse into a single helium atom.
What is this nuclear reaction called?

Fusion - Uniting of small nuclei
to form a larger nuclei

Our sun is large fusion 'bomb'.

School Blocks YouTube? Use the file below.

BingEnergyFission.mp4

This movie is part of the collection: Prelinger Archives

Producer: Sutherland (John) Productions Sponsor: General Electric Company

Keywords: Atomic-nuclear: Energy; Physics; Animation

Creative Commons license: Public Domain

A) Binding Energy - amount of energy needed to separate nucleons (protons and neutrons) in nucleus.

Protons and neutrons in nucleus in large nuclei have slightly less mass than n and p in small nuclei

Mass of Assembled
Nucleus

Combined Mass of an
Equivalent # of Nucleons.

Lost Mass
called Mass Defect

Mass Defect
=
Binding Energy

(mass lost is
converted to energy)

Ex) If the mass defect is .1 universal mass units then the binding energy = ....

(p. 1 Reference)

1 Universal Mass Unit

converts to

9.31 x 10² Mev

(p. 1 ref)

9.31 x 10¹ Mev

Subatomic
Particles