| 1. | Other radionuclides decay by gamma emission, which is very penetrative.
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| 2. | Metastable isomeric transition is the only nuclear decay mode that approaches pure gamma emission.
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| 3. | The hard gamma emissions also create a radiological hazard which requires remote handling during reprocessing.
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| 4. | Another example is the alpha decay of to form; which is followed by gamma emission.
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| 5. | 99m Tc decays by gamma emission, with a half-life : 6.01 hours.
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| 6. | Delayed gamma emissions are the most common form of delayed radiation but are not the only form.
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| 7. | Gamma emission from these isomers may have enough energy to start a thermonuclear reaction, without requiring any fissile material.
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| 8. | Gamma emission is " absolutely forbidden " when the nucleus begins in a zero-spin state, as such an emission would not conserve angular momentum.
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| 9. | Just as in the above delayed gamma emission, the nitrogen is not the actual source of the neutrons, a short lived isotope of oxygen is.
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| 10. | However, gamma emission is absolutely forbidden when the nucleus begins in a zero-spin state, as such an emission would not conserve angular momentum.
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