NUCLEAR & ATOMIC

Checked links in June 2016


Here is a very simple Rutherford scattering with a nuclear atom.  With the slit reasonably wide this is quite a nice simulation of Rutherford scattering.

The simple display of nuclei radioactively decaying with a plot of the number left, is useful.

Alpha decay is here shown nicely, linked to half-life. One nucleus can be 'watched' as time passes. Beta decay is done in the same way.

The Radioactive Dating game is very good.

Start a chain reaction, or introduce non-radioactive isotopes to prevent one. Control energy production in a nuclear reactor! Great simulations!

Nuclear power plant.  Stop it blowing up...

The IBM web site has a gallery with a collection of stm images of single atoms etc including the quantum corral, complete with standing electron de Broglie waves. (Rick Marshall) 

How about this Photoelectric effect with a quite detailed drawing of the experiment using a variable stopping voltage? You can change the frequency of the incident light, and then adjust the stopping voltage - you see the current fall as the voltage rises. When you get the voltage (only as a stopping voltage, not the other way round!) to be sufficient, a point is plotted on an appropriate graph.   Here's a second photoelectric effect, very nicely done - the stopping voltage affecting the electrons is beautiful.

How did Rutherford figure out the structure of the atomic nucleus without looking at it? Simulate the famous experiment in which he disproved the Plum Pudding model of the atom by observing alpha particles bouncing off atoms and determining that they must have a small core.

How did scientists figure out the structure of atoms without looking at them? Try out different models by shooting photons and alpha particles at the atom. Check how the prediction of the model matches the experimental results.

What a nice simple idea to have the orbits of the Hydrogen atom with an electron that can be moved from one level to the next, and then changed from a moving particle to a wave! (It gives the energy in J and eV, and the radius)

Showing the production of light from a discharge tube, starting from thermionic emission.

A home movie of the 1927 Solvay conference, showing all the great physicists involved in the Electron/Photon debate.

Particles

Bubble Chamber image of electron-positron pair production

The Particle Adventure is a great site for learning about Particle Physics

Build a carbon atom starting from quarks and electrons.  I like this one.

The Large Hadron Collider CERN.

Particle tracks shown and explained; very useful.