Department of Physics, Engineering Physics & Astronomy

Department of Physics, Engineering Physics & Astronomy
Department of Physics, Engineering Physics & Astronomy

Gamma-Ray Spectroscopy at ISAC

Carl Svensson
University of Guelph

Wednesday, March 31, 2004
1:30 PM @ Stirling A


The Isotope Separator and Accelerator (ISAC) facility located at the TRIUMF laboratory in Vancouver, Canada, is one of the world's most advanced radioactive ion beam facilities. ISAC produces unprecedented quantities of rare isotopes and delivers them to a variety of experimental groups in the form of high-quality, low-energy ion beams. These unique beams currently support a diverse program that includes nuclear astrophysics, nuclear structure, fundamental particle physics, and condensed matter research. A major upgrade to the ISAC facility, ISAC-II, is under construction and will extend both the range of radioactive nuclei that can be accelerated and the maximum energy of the accelerated beams.

Following an overview of the ISAC facility itself, this presentation will focus on the gamma-ray program at ISAC-I. Recent experiments include a study of the role of "halo neutrons" in the beta decay of the exotic nucleus 11Li, and measurements to constrain isospin symmetry breaking effects in superallowed Fermi beta decays, motivated by a possible discrepancy in the unitarity test for the Cabibbo-Kobayashi-Maskawa (CKM) quark-mixing matrix. A program to search for time-reversal violation through precision measurements of atomic electric dipole moments at ISAC will be discussed. The presentation will conclude with a brief introduction to ISAC-II and one of its key experimental facilities - the TRIUMF-ISAC Gamma-Ray Escape Suppressed Spectrometer (TIGRESS).

Refreshments will be available after the talk.