Check this out.

[lithium.]

This is really awesome. The element neptunium was achieved.

Read this it is a very good read.

http://www.lanl.gov/worldview/news/releases/archive/02-118.shtml

 

[MSBS]

Thanks seesaw...nice article.

I remember having read about this type of testing (experimental confirmation of what the critical mass is) back during the Manhattan project. They called it tickling the dragon's tail, and I think they had to do it with people in the building to control everything. Not a job I would want, I assure you.

 

[lithium.]

Not a job I would want, I assure you.

Same here.