Possible Duplicate:
What is the minimum amount of fissile mass required to acheive criticality?
I want to make a red laser the only problem is that the power is not sufficient so I had to resort to a nuclear reactor.
Possible Duplicate:
What is the minimum amount of fissile mass required to acheive criticality?
I want to make a red laser the only problem is that the power is not sufficient so I had to resort to a nuclear reactor.