Quantum Tunneling

Clay Sculpture “Quantum Tunneling” Paul Egan

Monday: The Grand Plan Tour of Prof. Brian Gorman’s Lab 1. Field emission / work function for both electrons and ions (we can be running an atom probe experiment at the time) 2. Particle / wave duality with electron diffraction 3. Lorentzian forces as applied to steering charged particles (E&M topic but a good learning experience)

Exam Review Session Group 2:00 2:25 2:25 2:50

1 Lab Tour Hill Hall 312

Exam Review MH 220

2 Exam Review MH 220

Lab Tour Hill Hall 312

Note: Group one should go directly to HH 312 (not MH 220 first)

What do the following have in common? Ammonia Masers Certain types of diodes Alpha particle emission by Unstable Heavy Nuclei Certain types of electron microscopes Solar Panels

What do the following have in common? Ammonia Masers Certain types of diodes Alpha particle emission by Unstable Heavy Nuclei Certain types of electron microscopes Solar Panels

They all involve Quantum Tunneling!

Note that small difference in Alpha particle Energy corresponds to a huge change in alpha-decay half life times (~20 orders of magnitude)!

Quantum Tunneling II

Tunneling Electron Microscope

Image Move

Illustrations of the atomic structure of the single wall carbon nanotube peapod, which has C60 molecules encapsulated inside. Also shown in the background are the electron waves in this one-dimensional nanostructure that are mapped using a scanning tunneling microscope.

http://www.wired.com/news/images/full/nanotube_full.jpg

Tunnel Diode