149Tb cross sections for basic and applied science

Accurate knowledge of reaction cross sections is needed for astrophysical nucleosynthesis, isotope production, reactor design, and stockpile science. Measurement of key reactions, and systematic measurements along isotopic chains, can be used to improve the accuracy of model predictions. I will describe our measurements of 149(g)Tb and 149(m)Tb production cross sections, as well as cross sections for nearly a dozen other isotopes in the region. The unique decay properties of 149(g)Tb make it particularly compelling for therapy and diagnostics for targeted alpha therapy for cancer treatment. We use beams of 1H, 6Li, 7Li on targets of enriched Sm, Eu, Gd, and will measure with beams of alpha particles in the future. The lanthanide targets were fabricated by physical vapor deposition (metallic) and molecular deposition (oxides). Short lived decays from metastable states are measured immediately after irradiation with the HPGe clover array Hyperion; long lived decays are measured with Hyperion and additional HPGe detectors. Our future experiments focusing on 149(g)Tb will measure an excitation function with a single beam by using a stack of thin targets and degraders.