| 21. | Neutron porosity logging tools contain an americium-beryllium neutron source, which irradiates the formation with neutrons.
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| 22. | Radium tetrafluoroberyllate is used as a standard neutron source.
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| 23. | The secondary consists of LiD fuel, which requires an external neutron source to begin the reaction.
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| 24. | Since 1976 he has been working at the Forschungszentrum J�lich, doing research on spallation neutron sources.
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| 25. | This way a long-lived neutron source is produced.
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| 26. | None of the commonly available neutron sources are adequate for fusion materials testing for various reasons.
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| 27. | For nuclear weapons applications, dense plasma focus devices can be used as an external neutron source.
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| 28. | The best-known neutron sources were radium-beryllium and polonium-beryllium.
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| 29. | He says the Spallation Neutron Source will restore U . S . leadership in the field.
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| 30. | It is practiced at research reactors and spallation neutron sources that provide neutron radiation of sufficient excitations.
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