(a) Most of the energy from a nuclear explosion is released during the final moments of...

(a) Most of the energy from a nuclear explosion is released during the final moments of the detonation. Using the result of the previous problem, compute the number of fission generations required to release 99% of the total explosive yield. Use the nominal value k = 2. (b) If the mean time between generations is the order of 10-8 sec over what period of time is energy released during a nuclear explosion?

Solutions

Expert Solution

Consider n generations

The energy released in final m-generation can be expressed as

The fraction of energy released in final m-generations is

For k=2 and very large n

Now the fraction is given as 99%. i.e

So, 99% of the energy is released during final 6.644~7 generations.

The time per generation given to be 10^-8 s. So, the total time of release of this energy is

genius_generous answered 1 year ago

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