In a particular fission event of by slow neutrons, it happens that no neutron is emitted and that one of the primary fission fragments is . We have to answer the following: (a) What is the other fragment? (b) How is the disintegration energy split between the two fragments? (c) We have to calculate the initial speed of each fragment.

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(a)

In a particular fission event of by slow neutrons, it happens that no neutron is emitted and that one of the primary fission fragments is . As the atomic number of is 92 and one thermal neutron is absorbed the total mass number of the compound nucleus that disintegrates by fission will be 236. The atomic number of germanium, , is 32, therefore, the other fission fragment has to be neodymium, .

(b)

We assume that the compound nucleus decays at rest. From conservation of momentum the fission energy will be divided as

And the kinetic energy of the nuclide will be

(c)

The initial speed of the nuclide will be

And, the initial speed of the nuclide will be