An organic sample of mass 4.00 kg absorbs 2.00J via slow neutron radiation (RBE=5) . What is the dose equivalent (mSv)?

In a Rutherford scattering experiment, assume that an incident alpha particle (radius 1.80 m) is headed directly toward a target gold nucleus (radius 6.23fm).What energy must the alpha particle have to just barely “touch” the gold nucleus?

Generally, more massive nuclides tend to be more unstable to alpha decay. For example, the most stable isotope of uranium , has an alpha decay half-life of . The most stable isotope of plutonium is with a half-life, and for curium we have and . When half of an original sample of has decayed, what fraction of the original sample of (a) plutonium and (b) curium is left?

The magic nucleon numbers for nuclei are given in Module 42-8 as 2, 8, 20, 28, 50, 82, and 126. Are nuclides magic (that is, especially stable) when (a) only the mass number A, (b) only the atomic number Z, (c) only the neutron number N, or (d) either Z or N (or both) is equal to one of these numbers? Pick all correct phrases.

A 75 kg person receives a whole-body radiation dose of , delivered by alpha particles for which the factor is 12. Calculate (a) the absorbed energy in joules and the dose equivalent in (b) sieverts and (c) rem.

How much energy is released when a nucleus decays by emitting (a) an alpha particle and (b) a sequence of neutron, proton, neutron, and proton? (c) Convince yourself both by reasoned argument and by direct calculation that the difference between these two numbers is just the total binding energy of the alpha particle. (d) Find that binding energy. Some needed atomic and particle masses are