Collection & Research

Hours and Location

Atomic Energy of Canada Ltd. Cobalt-60 Therapy Machine

Atomic Energy of Canada Ltd. Cobalt-60 Therapy Machine

Current location:

Collection Storage Facility


This Theratron Junior (serial no. 15) radiotherapy device was used in Binghamton, New York, at Our Lady Lourdes Hospital from 1957 to 1968.

Technical history:

The Theratron Junior delivered cobalt-60 radiation, a radioactive isotope of cobalt, for the treatment of cancer. Cobalt beam therapy uses deeply penetrating gamma radiation from a cobalt-60 source contained in the heavily reinforced tungsten head. These gamma rays are directed at malignant tumour sites.


In 1951, Canada was the first country to develop cobalt-60 radiation treatment. This cobalt therapy machine was manufactured by Atomic Energy of Canada Limited, a world leader in developing and selling nuclear technology for medical purposes.

Canada Science and Technology Museum
Artifact No.
Atomic Energy of Canada Ltd
Manufacturer Location
Ottawa, Ontario
Manufacture Date
Acquisition Date