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Beta decay: Quiz

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Question 1: At the fundamental level (as depicted in the ________ below), this is due to the conversion of a down quark to an up quark by emission of a W boson; the W boson subsequently decays into an electron and an antineutrino.
Faddeev–Popov ghostQuantum field theoryFeynman diagramParticle physics

Question 2: If the proton and neutron are part of an ________, these decay processes transmute one chemical element into another.
UraniumNuclear fusionAtomic nucleusPlutonium

Question 3: In nature, most isotopes are beta stable, but a few exceptions exist with half-lives so long that they have not had enough time to decay since the moment of their ________.
Beta decayNuclear fusionNucleosynthesisAlpha decay

Question 4: In a famous letter written in 1930 ________ suggested that in addition to electrons and protons atoms also contained an extremely light neutral particle which he called the neutron.
Enrico FermiWolfgang PauliPaul DiracWerner Heisenberg

Question 5: ________ of beta particles has continuous spectrum ranging from 0 to maximal available energy (Q), which depends on parent and daughter nuclear states participating in the decay.
Classical mechanicsMass–energy equivalenceKinetic energySpecial relativity

Question 6: So, unlike β, β+ decay cannot occur in isolation, because it requires energy, the ________ of the neutron being greater than the mass of the proton.
ForceMassClassical mechanicsGeneral relativity

Question 7: In 1920-1927, Charles Drummond Ellis (along with ________ and colleagues) established clearly that the beta decay spectrum is really continuous, ending all controversies.
James ChadwickPatrick Blackett, Baron BlackettWerner HeisenbergEnrico Fermi

Question 8: In 1911 ________ and Otto Hahn performed an experiment that showed that the energies of electrons emitted by beta decay had a continuous rather than discrete spectrum.
Lise MeitnerNuclear fissionEnrico FermiWerner Heisenberg

Question 9: A beta-stable nucleus may undergo other kinds of radioactive decay (________, for example).
Nuclear fissionGamma rayNuclear fusionAlpha decay

Question 10: Beta decay does not change the number of ________, A, in the nucleus but changes only its charge, Z.
ProtonQuarkNucleonNeutron







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