Exercise 1

Calculate the energy released when isotope of sodium , 1124?Na , decays by??emission. The atomic mass of 1124?Na is23.990963 uu, the atomic mass of 2412?Mg is23.985042 uu.Assume that the neutrino has no mass. (Answer in 3 significant figures and in MeV)

Exercise 2

What is the approximate radius of an ? particle 42?He. (Answer in 2 significant figures and units)

Exercise 3

The37?Li nucleus has an excited state 0.48MeV above the ground state.What wavelength gamma photon is emitted when the nucleus decays from the excited state to the ground state? (in meters)

Exercise 4

How much recoil energy does a1940?K nucleus get when it emits a 2.46MeV gamma ray? (Answer in eV)

Exercise 5

Suppose two alpha particles were held together so they were just touching.

1-Estimate the electrostatic repulsive force each would exert on the other. (answer in 2 sig figures)

2-What would be the acceleration of an alpha particle subjected to this force? answer in m/s² Exercise 6

In a series of decays, the nuclide92235?U becomes 82207?Pb.How many? and ?? particles are emitted in this series?

Exercise 7

A muon has a mass of106MeV/c ² .What is this in atomic mass units?

Exercise 8

1-What is the decay constant of92238?U whose half-life is4.510⁹ year? (answer in 2 sig figures in years ^-1 )

2-The decay constant of a given nucleus is 4.610^?5s^?1. What is its half-life? (T_1/2 =? hours)

Exercise 9

If an alpha particle were released from rest near the surface of a100257?Fm nucleus, what would its kinetic energy be when far away? (answer in 2 sig figures in MeV)

Exercise 10

Use the figure to estimate the total binding energy of92238?U and 3684?Kr in MeV, in 2 sig figures.

10 So Fe 120 50 Sn He 8 238 92 0 6 Binding energy per nucleon (MeV) 4 He 2 50 100 150 200 250 Number of nucleons, A (mass number)