TIGRESS, an array of up to 16 segmented, Compton-suppressed high-purity germanium clover detectors, supports a broad program of nuclear structure and astrophysics research at TRIUMF’s ISAC facility. Combining gamma-ray spectroscopy with charged-particle and recoil detection allows experiments with stable and reaccelerated radioactive ion beams to probe nuclear structure and astrophysics.
This seminar will begin with an introduction to TRIUMF and ISAC, followed by an overview of TIGRESS and its complementary instrumentation, including the EMMA recoil mass spectrometer, the Bambino and SHARC-II silicon detector arrays, and the TIP CsI(Tl) array. Selected science highlights will demonstrate how Coulomb excitation, transfer reactions, and fusion-evaporation measurements address current questions in nuclear physics. Topics will include shape evolution in neutron-deficient strontium isotopes, shell structure and isomerism near the island of inversion, and experimental constraints on astrophysical reactions. Examples will illustrate the role of coincident particle, recoil, and gamma-ray measurements in identifying reaction channels and extracting information from weak or contaminated radioactive beams.
The talk will conclude with an outlook on ARIEL, TRIUMF’s new radioactive ion beam facility. Its additional proton-driven production station and electron-driven photofission capability are expected to increase beam availability and enhance access to neutron-rich isotopes. These developments will provide opportunities to extend the TIGRESS research program to more challenging nuclei and reactions, supporting future studies of nuclear structure and astrophysics.
TRIUMF