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Waveform Audio File Format  |  2002-11-21  |  2.5 MB  |  1 channel  |  11,025 sample rate  |  1 minute, 59 seconds
Transcription: So in this fission into two identical rhodium nuclei, two spare neutrons must also be liberated with a lot of energy as well. If different rhodium isotopes were produced, there would be more than two neutrons. And of course the thorium nucleus needn't split into identical halves. There are dozens of possibilities. And in fact, unequal splits are more likely. But a common feature is that a few neutrons are liberated in the fission. The other crucial point is that the impact of a neutron on a heavy nucleus is a good way of making it undergo fission. This was already quite clear by 1939, even wit ...