http://www.matter.org.uk/tem/electron_scattering.htm
The demo allows you to see what happens to the primary electrons or the secondary electrons in the substrate, separately or together.
You can select beam energy, substrate material, observation depth scale, although the selection range is somewhat limited.
QUOTE (guiding_light+Jun 20 2006, 01:27 AM)
..what happens to the primary electrons or the secondary electrons in the substrate, separately or together...
How the scattering particles appears for real - cosmic ray showers measured in Korsica...
How the scattering particles appears for real - cosmic ray showers measured in Korsica...
Nice pictures... what particle trajectories are we looking at?
When I try to open that page, my IE crashes... is that a real page?
How often is the electron scattered by the atomic nucleus's versus the atomic electrons?
Do the electrons bounce off each other? Or better do the avoid each other because of their electromagnetic repulsion?
The nucleus though ought to swerve free electrons toward it by its attraction. More often than not this should mean the electrons should hit and/or bounce off the nucleus. I know of no other mechanism to avoid this.
Both these effects should constitute scattering.
Do the electrons bounce off each other? Or better do the avoid each other because of their electromagnetic repulsion?
The nucleus though ought to swerve free electrons toward it by its attraction. More often than not this should mean the electrons should hit and/or bounce off the nucleus. I know of no other mechanism to avoid this.
Both these effects should constitute scattering.
QUOTE
How often is the electron scattered by the atomic nucleus's versus the atomic electrons?
Do the electrons bounce off each other? Or better do the avoid each other because of their electromagnetic repulsion?
The nucleus though ought to swerve free electrons toward it by its attraction. More often than not this should mean the electrons should hit and/or bounce off the nucleus. I know of no other mechanism to avoid this.
Both these effects should constitute scattering.
Do the electrons bounce off each other? Or better do the avoid each other because of their electromagnetic repulsion?
The nucleus though ought to swerve free electrons toward it by its attraction. More often than not this should mean the electrons should hit and/or bounce off the nucleus. I know of no other mechanism to avoid this.
Both these effects should constitute scattering.
All charges interact, but the nucleus contributes little scattering because its size is so small compared to the rest of the atom. The outermost electrons sweep the largest area, also contribute the largest cross-section. Since these are also least bound, ionization is expected (unless the incident electron energy is lower than the binding energy, usually several eV), and you have secondary electron yield.
PhysOrg scientific forums are totally dedicated to science, physics, and technology. Besides topical forums such as nanotechnology, quantum physics, silicon and III-V technology, applied physics, materials, space and others, you can also join our news and publications discussions. We also provide an off-topic forum category. If you need specific help on a scientific problem or have a question related to physics or technology, visit the PhysOrg Forums. Here you’ll find experts from various fields online every day.
To quit out of "lo-fi" mode and return to the regular forums, please click here.