Home » Nuclear Physics » Nuclear Fission and Fusion – A Facebook conversation

Subscribe to this site by email

Loading

Nuclear Fission and Fusion – A Facebook conversation

Find below a conversation between Master Deepak, PUC student and Mr. Mathew Abraham, Physics teacher.

Deepak asked: “nuclear fusion or fission in which of these energy released is more and why?”

 

Energy released per fission is more than energy released per fusion. But energy released per unit mass during fusion is very much greater than energy released per unit mass during fission

 

But why energy released is more

 

The fission of a U-235 releases about 200 MeV of energy
whereas the fusion of 4H to form He releases only about  20 MeV
But, the 200 MeV is obtained from 236 amu
and the 20 MeV is obtained from just 4 amu

 

Then why dont we use nuclear fusion as source of energy and electricity

 

10:38am

Nuclear fusion requires very high temperature to start. It is difficult to maintain such a huge temperature (of the order of million degrees).

Tokamak magnetic field and plasma current.
Tokamak magnetic field and plasma current. (Photo credit: Wikipedia)

Research is going on to construct nuclear fusion reactor

The international prototype is named tokamak
In that the nuclear fusion is carried out in plasma state held at high temperature confined in magnetic field produced by huge torroidal solenoids
http://youtu.be/IU7oMISRS2Y

 

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Hits so far @ AskPhysics

  • 2,240,426 hits

Subscribe to AskPhysics via Email

Enter your email address to subscribe to this blog and receive notifications of new posts by email.

Join 4,336 other subscribers

October 2020
M T W T F S S
 1234
567891011
12131415161718
19202122232425
262728293031  

Schrodinger’s Cat in Daily Life

%d bloggers like this: