HARD
Diploma
IMPORTANT
Earn 100
Deviations from Rutherford scattering are expected when the alpha particles reach large energies. Suggest an explanation for this observation.
Important Questions on Quantum and Nuclear Physics (HL)
HARD
Diploma
IMPORTANT
Some alpha particles are directed at a thin foil of gold (Z=79) and some others at a thin foil of aluminium (Z-13). Initially, all alpha particles have the same energy. This energy is gradually increased. Predict in which case deviations from Rutherford scattering will first be observed.
HARD
Diploma
IMPORTANT
Show that the nuclear density is the same for all nuclei. (Take the masses of the proton and neutron to be the same.)
MEDIUM
Diploma
IMPORTANT
State the evidance in support of nuclear energy levels.
MEDIUM
Diploma
IMPORTANT
Radium's first excited nuclear level is 0.0678MeV above the ground state. Write down the reaction that takes place when radium decays from the first excited state to the ground state.
MEDIUM
Diploma
IMPORTANT
Radium's first excited nuclear level is above the ground state.The wavelength of the photon emitted is . Find the value of x.
HARD
Diploma
IMPORTANT
Plutonium decays into uranium by alpha decay. The energy of the alpha particles takes four distinct values: 4.90MeV, 4.86MeV, 4.76MeV and 4.60MeV. In all cases a gamma ray photon is also emitted except when the alpha energy is 4.90MeV. Use this information to suggest a possible nuclear energy level diagram for uranium.
HARD
Diploma
IMPORTANT
The diagram shows a few nuclear energy levels for
Identify the four indicated transitions.
MEDIUM
Diploma
IMPORTANT
Find the decay constant for krypton-92, whose half-life is 3.00s.
