| 31. | The photodisintegration of beryllium by gamma rays emitted by antimony-124 is used as a source for thermal neutrons.
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| 32. | White neutron beams also have some measure of uncertainty in their energy spectrum, often with high thermal neutron content.
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| 33. | "Cold neutrons " are thermal neutrons that have been equilibrated in a very cold substance such as liquid deuterium.
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| 34. | The need for fluorine arose from the need to separate the thermal neutrons ), whereas the latter is not.
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| 35. | This means that it can be split into two or three fragments ( fission products ) by thermal neutrons.
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| 36. | The HB-2 thermal neutron beam tube is situated radially relative to the reactor core, looking directly at the fuel.
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| 37. | This discussion focuses on thermal neutron imaging, though much of this information applies to cold and epithermal imaging as well.
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| 38. | The 10 B isotope is useful for capturing thermal neutrons ( see neutron cross section # Typical cross sections ).
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| 39. | The 6 Li has a high cross-section for thermal neutron absorption through the 6 Li ( n, ? ) reaction.
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| 40. | This leads to buildup of heavier actinides and lowers the number of thermal neutrons available to continue the chain reaction.
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