2023 Medal Winners | francais

The 2023 CAP-TRIUMF Vogt Medal for Contributions to Subatomic Physics

is awarded to

Paul Garrett

"I am incredibly honoured to have been selected as the recipient of the 2023 Vogt medal considering the strength of the Canadian subatomic physics community. I am especially grateful to my collaborators and talented team of students and post-doctoral researchers for their work and tireless efforts in our studies." winner citation

The Canadian Association of Physicists (CAP) and TRIUMF are pleased to announce that the 2023 CAP-TRIUMF Vogt Medal for Contributions to Subatomic Physics is awarded to Paul Garrett, University of Guelph, in recognition of his recent demonstration that the collective excitations of nuclei in the cadmium region, previously understood to be text book examples of vibrations about a spherical shape, are better described as rotations of coexisting deformed shapes, and hence that spherical vibrational nuclei are either very rare or do not exist. announcement

Professor Garrett is an outstanding experimental physicist who applies a wide range of experimental techniques to probe the nature of collective excitations in nuclei. His detailed studies of surface vibrational modes over the past quarter century have recently culminated in a breakthrough experiment performed at TRIUMF’s Isotope Separator and Accelerator (ISAC) radioactive ion beam facility. This study demonstrated that the structure of the 110,112Cd isotopes, which have been considered textbook examples of spherical vibrational nuclei for over 50 years, is better described by rotational excitations of multiple coexisting deformed shapes.

Prof. Garrett’s research indicates that there may, in fact, no longer be any clear examples of surface vibrations in spherical nuclei, once thought to be among the most basic and prevalent collective nuclear excitations. This represents a paradigm shift in our understanding of the structure of nuclei, inspiring new research programs from groups around the world aimed at understanding the basic excitation modes of the complex nuclear quantum many-body system. nominator citation

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