This instructible shows how to obtain and extract Americium,have fun :)
Step 1: How to Obtain and Extract Americium
Inside inexpensive smoke alarms is a tiny amount of the radioactive element Americium. The isotope used, americium 241, has a half life of 452 years. Since americium 241 decays into the much more stable isotope neptunium 237 (half-life 2.1 million years), the sample in the smoke detector will have a few trillion new neptunium atoms in it every year.
Step 2: How to Obtain and Extract Americium
To get to the sample, we disassemble the smoke detector.
Step 3: How to Obtain and Extract Americium
The chamber that contains the americium sample is usually easy to find and open
Step 4: How to Obtain and Extract Americium
Removing the plastic parts gets us closer to the americium.
Step 5: How to Obtain and Extract Americium
The americium itself, in this smoke detector, is plated onto a small button of metal. Other detectors I have disassembled have the americium plated onto a small disc.
Step 6: How to Obtain and Extract Americium
If you have a geiger counter or a scintillation detector, you can use it to confirm that the sample is radioactive. Since americium 241 emits only alpha particles (and a very small amount of low energy gamma), it is safe if kept in the glass bottle, since alpha particles don't penetrate glass.
Okay,so now you know how to Obtain and Extract americium :-o