Whats the difference between spontaneous fission and radioactive decay?

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Spontaneous fission and radioactive decay are distinct processes in nuclear physics. Spontaneous fission involves the nucleus of an atom splitting into smaller parts without external influence, while radioactive decay refers to the process by which an unstable atomic nucleus loses energy by emitting radiation. Technetium (Tc) is produced from the spontaneous fission of Uranium-238 (U-238), but it does not appear in the U-238 decay chain. The analogy provided compares spontaneous fission to arson, emphasizing that both processes result in the release of energy, but through different mechanisms. Understanding these differences is crucial for studying nuclear reactions and elements like Technetium.
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I was doing some research on Technetium and I found out that it occurs naturally in uraninite from the spontaneous fission of U-238. But on the decay chain of U-238 I can't find Tc any where... So what's the difference between spontaneous fission and radioactive decay?
 
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Spontaneous fission is to radioactive decay as arson is to fire.
 
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