Nuclear structure research at TRIUMF

The radioactive beam laboratory at TRIUMF is currently the highest power ISOL facility in the world. Taking advantage of the high-intensity beams, major programs in nuclear astrophysics, nuclear structure, and weak interaction studies have begun. The low-energy area, ISAC-I, is capable of delivering beams up to mass 30 at ≈ 1.7 MeV/u or 60 keV up to the mass of the primary target, whereas ISAC-II will ultimately provide beams up to mass 150 and ≈ 6.5 MeV/u. Major γ-ray spectrometers for nuclear structure research consist of the 8π spectrometer at ISAC-I, and the TIGRESS spectrometer now being constructed for ISAC-II. Results from recent experiments investigating the β-decay of nuclei near N = 90 and Coulomb excitation of 20,21Na are presented that highlight the capabilities of the spectrometers