Nuclear excited states (AQA A-Level Physics): Flashcards

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Nuclear excited states
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Nuclear excited state

Higher energy configuration of nucleus

Ground state energy (by convention)

0.00.0 MeV

Gamma photon energies from a nuclide

Specific & fixed for each isotope

Metastable state

Excited state with half-life >1> 1 ns

Notation for metastable isotopes

'm' after mass number (e.g., Ba-137m)

Asterisk (*) in nuclear equations

Nucleus in excited state

Most common medical radioisotope

Technetium-99m

Technetium-99m half-life

6 hours

Technetium-99m gamma energy

140140 keV

Molybdenum-99 half-life

66 hours

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