My research spans a wide variety of areas in low-energy nuclear physics, using multiple techniques at various facilities around the world to perform experiments. I work in several international collaborations seeking to understand the structure of nuclei, and the role that symmetries are playing in the organization of protons and neutrons in the nucleus, and the Universe in general.
My recent and current research activities include:
- Studies of collective states (those in which many nucleons participate) in nuclei and the limits of collectivity in nuclei. The goal of these studies is an understanding how systems of nucleons are organized and how they form collective excitations.
- Studies of nuclei far from stability exploring the limits of existence, and the consequences of extreme neutron-to-proton ratios. The goal of these studies is to understand the evolution of nuclear collectivity and shell structure as one moves away from the stable nuclei and the impact that this has on nucleosynthesis.
- Precision measurements of nuclear decays with the aim of obtaining a more precise value for some fundamental constants of particle physics, and the search for physics beyond our currently accepted theories.
- Development of new and novel instrumentation for nuclear physics. Specifically, I have developed the data acquisition system for the 8pi gamma-ray spectrometer at TRIUMF, the most sensitive spectrometer in the world dedicated to beta-decay studies, and have built the DANTE array of barium fluoride detectors to enable determination of nuclear lifetimes to a precision of 10-11 seconds. I am currently constructing the DESCANT neutron detector array. In addition, I am active in the the development of the GRIFFIN spectrometer, a new gamma-ray array that will be approximately 300 times more powerful than the 8pi spectrometer.
These activities often require the use of many world-wide facilities such as TRIUMF (Vancouver), Argonne National Laboratory (Chicago, USA), University of Kentucky (Lexington, USA), University of Cologne (Cologne, Germany), and the Ludwig-Maximillians University (Munich, Germany).
Please see the Nuclear Physics Group
KEYWORDS: Nuclear physics, nuclear spectroscopy, gamma-ray, neutron, and charged-particle detection, nuclear instrumentation, nuclear reactions, beta-decay, collective and single-particle excitations in nuclei.