| 21. | A thermal neutron is one which is moving about the same speed as the atoms around it.
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| 22. | Gadolinium-157 has the highest thermal neutron barns.
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| 23. | Several neutron scattering techniques have been developed to use thermal neutrons to characterize magnetic micro and nanostructures.
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| 24. | Upon irradiation, a thermal neutron interacts with the target nucleus via a non-elastic collision, causing neutron capture.
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| 25. | The second most used fissile isotope plutonium-239 can also fission or not fission on absorbing a thermal neutron.
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| 26. | The hexaboride has a low coefficient of thermal expansion and a high nuclear cross section for thermal neutrons.
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| 27. | "This system uses a very simple technology, called thermal neutron analysis, " said Shea, the chief operating officer.
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| 28. | The photodisintegration of beryllium by gamma rays emitted by antimony-124 is used as a source for thermal neutrons.
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| 29. | It will operate with thermal neutrons.
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| 30. | This detector shows good efficiency at detecting fast neutrons in a background of thermal neutrons and gamma radiation.
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