Tasmanian Physicist Profile

Barbara Shields, PhD, MARPS - Health Physicist, Public Servant

Born: 1950, Inverness, Scotland
Present position: Senior Health Physicist, Department of Health and Human Services, Tasmania

Why I became interested in physics
I always enjoyed mathematics and physics at school. I considered medicine as a career but I felt it was not scientific enough. Then I heard about medical physics and decided that was worth pursuing.

What is my current work?
I work for the Tasmanian Government, in the Department of Health and Human Services and head a small team of health physicists. We are involved in regulating the use of radiation in areas such as medicine, industry and research, to ensure that radiation is used safely. Our work covers all aspects of radiation measurement and control, whether the radiation is from radioactive materials or is produced electrically e.g. in X-ray units or lasers. In particular, health physicists advise on radiation protection and on health effects of radiation exposure. As part of the job, health physicists visit many interesting sites where radiation is used and meet a wide variety of people. On rare occasions, as in the photograph, a health physicist may travel by helicopter.

Future prospects for health physicists
Use of radiation - whether from radioactive materials or from electrical devices - is prevalent worldwide. A lot is known about the health effects of radiation and radioactive materials but there is still much to learn. Public awareness of radiation issues is also increasing. Common topics include nuclear power and its future, mobile phones, the consequences of radiation accidents and the future of radioactive waste disposal. Thus, there will be a continued need for health physicists to ensure that current uses of radiation are safely controlled and to contribute to future developments.

In Australia, the radiation protection scene is dynamic. Recently, the Commonwealth introduced radiation protection legislation and set up a new Agency – the Australian Radiation Protection and Nuclear Safety Agency. Many people working in radiation protection are not employed by the Government. You can find out more about the Australian scene from the Australasian Radiation Protection Society (http://www.arl.gov.au/arps/).

My career path components
After obtaining a BSc (Hons) in physics and teaching in West Africa for a year with Voluntary Service Overseas, I worked as a medical physicist in a radiotherapy department in Glasgow for about two years. Promotion prospects were bleak without a higher degree. I changed fields a little - to environmental physics, but still with a radiation theme - to obtain a PhD. A research fellowship and contract university positions followed. Ten years ago, I started work as a health physicist with the Department of Health and Human Services in Hobart and was appointed as Senior Health Physicist in 1992. This work allows me to continue extending my knowledge and understanding of health and environmental effects of radiation and radioactive materials.



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