Is this diagram i have made relating to david hahns experiments correct?

[nuclear-boy]

hi,

see my diagram here, is my "neutron gun" correct, or have i made mistakes?
what will happen to the "uranium powder"? will it eternally grow more radioactive, or will it at one point transmutate?

http://alf.000space.com/neutron%20gun.png




thanks for your help, alf.

 

[askAphysicist]

where is the diagram?