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Offset the citation and fixed 2 typos.
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Frederic Thomas
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I read this: "These so-called fast neutrons do not cause fission as efficiently as slower-moving ones so they are slowed down in most reactors by the process of moderation." Why

These so-called fast neutrons do not cause fission as efficiently as slower-moving ones so they are slowed down in most reactors by the process of moderation.

Why slowly neutrons "thermal" are more efficiently in causecausing the fission? Is due to their larger cross section? AmdAnd why the cross section of thermal neutron is larger thenthan the faster ones?

I read this: "These so-called fast neutrons do not cause fission as efficiently as slower-moving ones so they are slowed down in most reactors by the process of moderation." Why slowly neutrons "thermal" are more efficiently in cause the fission? Is due to their larger cross section? Amd why the cross section of thermal neutron is larger then the faster ones?

I read this:

These so-called fast neutrons do not cause fission as efficiently as slower-moving ones so they are slowed down in most reactors by the process of moderation.

Why slowly neutrons "thermal" are more efficiently in causing the fission? Is due to their larger cross section? And why the cross section of thermal neutron is larger than the faster ones?

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Salmon
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Thermal neutrons in fission

I read this: "These so-called fast neutrons do not cause fission as efficiently as slower-moving ones so they are slowed down in most reactors by the process of moderation." Why slowly neutrons "thermal" are more efficiently in cause the fission? Is due to their larger cross section? Amd why the cross section of thermal neutron is larger then the faster ones?