Permanent brachytherapy is a localized cancer treatment where small radioactive "seeds" are surgically placed directly inside a tumor and left there permanently.
Explain one advantage of using a low-energy β\betaβ-emitting isotope with a short half-life, rather than a highly penetrating γ\gammaγ-emitting isotope with a long half-life, for these permanent implants.
23 exam-style questions on AQA A Level Physics Radionuclide imaging and therapy (A-level only), covering Imaging techniques (A-level only), Half-life (A-level only), Gamma camera (A-level only), Use of high-energy X-rays (A-level only), Use of radioactive implants (A-level only), and Imaging comparisons (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.