Register to reply

Controlling Nuclear Fission Geometry

by nadirkazan
Tags: controlling, fission, geometry, nuclear
Share this thread:
Oct16-13, 06:16 PM
P: 1
Hi everyone,
I'm an engineer and not a physicist, so forgive me if something sounds stupid.

Question: Is it possible to know, which way products of nuclear fission (u-235) will go?

Imagine a sheet of single (or few) atom layer crystal of U-235, that is irradiated by neutron source from the edge. Is it possible to predict where fission products will go?

Is it better done experimentally or can be done theoretically or through simulation?
Phys.Org News Partner Physics news on
Engineers develop new sensor to detect tiny individual nanoparticles
Tiny particles have big potential in debate over nuclear proliferation
Ray tracing and beyond
Oct17-13, 08:36 AM
P: 1,948
No, they will go randomly in any possible direction
Oct18-13, 03:18 AM
P: 386
Why? There are at least 2 factors that are not centrally symmetrical.
One is the direction of the incoming neutron. And the other... Uranium 235 has odd number of nucleons, so it has to be a fermion. In fact, the spin happens to be 7/2... so even if the neutron happens to have opposite spin (which it would not always have) the result would be at least spin 3.

Wouldn´t the centrifugal force favour the fission products going somewhere along the equator of the U-235 nucleus rather than towards its poles?

Oct18-13, 12:21 PM
P: 11,925
Controlling Nuclear Fission Geometry

Spin is not a rotation.
There might be some dependence on the spin direction, but as you don't control that spin direction, this does not change the result.

Register to reply

Related Discussions
Nuclear Fusion and Nuclear Fission, safety and efficiency Nuclear Engineering 9
Nuclear fission Introductory Physics Homework 3
E=mc2 and nuclear fission Biology, Chemistry & Other Homework 1
Nuclear fission High Energy, Nuclear, Particle Physics 21
Nuclear fission Nuclear Engineering 16