Dr AJ Mitchell

Mitchell, AJ profile
Position Senior Fellow
Department Nuclear Physics & Accelerator Applications
Research group Nuclear structure group
Office phone (02) 612 53526
Email
Office Nuclear Physics 2 53

Biography

AJ Mitchell is an experimental nuclear physicist at the Australian National University specialising in nuclear structure and radioactive decay. His research focuses on the development and application of charged-particle and γ-ray spectroscopy techniques to investigate the structure of atomic nuclei, particularly systems with extreme neutron?to?proton ratios.

His work combines experimental measurements with instrumentation development to study how nuclear properties evolve with neutron number, including the behaviour of single-particle states and the structure of exotic nuclei far from stability. These studies provide insight into the fundamental behaviour of nuclei and contribute to understanding processes relevant to nucleosynthesis and radioactive decay.

A central aspect of his research is the development of experimental capability for nuclear spectroscopy. This includes work on detector systems and experimental infrastructure to enable measurements of nuclear structure and decay properties that are not otherwise accessible, particularly for rare or short-lived nuclear systems.

His research draws on experiments conducted at both national and international facilities, including work at Argonne National Laboratory, thw Facility for Rare Isotope Beams and other major accelerator laboratories, and contributes to experimental programs investigating nuclear structure and decay across a wide range of isotopes.

In addition to research, he contributes to teaching, supervision, and outreach in nuclear science. He has worked extensively with undergraduate students through programs such as the Tuckwell Scholarship and is actively involved in science communication, laboratory outreach, and international training initiatives in the Asia-Pacific region.

Academic career

  • Senior Lecturer, Australian National University, 2022–present
  • Research Fellow, Australian National University, 2016–2022
  • Postdoctoral Fellow, Australian National University, 2016–2022
  • Postdoctoral Research Associate and Adjunct Teaching Faculty, University of Massachusetts Lowell, 2012–2014

Education

  • PhD (Experimental Nuclear Physics), University of Manchester, UK, 2012
  • MSci (Applied Mathematics and Physics), Queen’s University Belfast, UK, 2009

Research interests

Research interests centre on nuclear structure and radioactive decay, with a particular focus on spectroscopy of neutron-rich nuclei and the evolution of single-particle and collective behaviour far from stability.

This work integrates:

  • charged-particle and γ-ray spectroscopy
  • nucleon-transfer and decay measurements
  • development of experimental instrumentation and detector systems

Current research addresses:

  • evolution of shell structure in exotic nuclei
  • single-particle strength and tensor interactions
  • collective excitations and shape coexistence
  • decay properties relevant to nucleosynthesis

Grants and awards

Research awards

2023: Visiting Fellow Award, Facility for Rare Isotope Beams, USA.

 

 

Teaching

AJ contributes to teaching and supervision across undergraduate and postgraduate programs in nuclear physics and nuclear science at ANU. He supervises research projects spanning Honours, Masters, and PhD levels, with student work integrated into experimental research programs.

He has a strong focus on research?led education, including the development of practical laboratory experiences in radiation detection and γ?ray spectroscopy, and has contributed to mentoring of students and early career academics. 

Teaching Awards

  • 2025: Commendation for Excellence in Education (Teaching Excellence), ANU College of Science and Medicine. 
  • 2021: Commendation for Excellence in Education (Research Supervision), ANU College of Science. 
  • 2019: Senior Fellow, UK Higher Education Academy. 
  • 2017: Fellow, UK Higher Education Academy.

Program Convenor

Course Convenor/Lecturer

  • PHYS2101/PHYS6601: Nuclear and Radiation Physics (2025 - current)
  • PHYS8207: Master of Nuclear Science Research Project (2022 - current)
  • PHYS8202: Reactor Science (2025 - 2026)
  • PHYS8205: Nuclear Fuel Cycle (2026) 
  • REGN8204: Regulating Nuclear Capabilities (2022 - 2024)
  • LAWS8316: International Nuclear Energy Law (2023 - 2024)
  • PHYS1001: Foundations of Physics (2018 - 2021)

Former Honours/Masters (Advanced) students

  • Luke Schroeder, MSc (Advanced), 2026
  • Zoe Crowley-Burrows, Honours, 2025
  • Yannick Ravert, MSc University of Hasselt, Belgium, 2025
  • Ryan Leonard, MSc (Advanced) 2024
  • Tom Perrisinotto, Honours, 2024
  • Gil Goodman, Honours, 2024
  • Jack Woodside, Honours, 2023
  • Martha Reece, Honours, 2022
  • Gareth Roderick, Honours, 2021
  • Caspian Nichols, Honours, 2020
  • James Pope, Honours, 2020

Outreach

Awards

  • 2019: Tall Poppy Science Award, Australian Institute of Policy & Science. 

AJ contributes to engagement in nuclear science through sustained laboratory-based outreach, education programs, and international training activities.

At ANU, he hosts regular visits to the Heavy Ion Accelerator Facility, delivering hands?on training in radiation detection and nuclear physics for secondary school students, teachers, and government participants. These activities provide direct access to experimental nuclear science and are integrated with teaching and training programs.

His international engagement includes physics education and training activities in the Asia-Pacific region, including teacher-training initiatives in Timor-Leste and collaborative programs with the University of Yangon in Myanmar, supporting capacity development in nuclear science and experimental methods.