Where can I buy sources for nuclear radiation activities?

Radioactive sources are available from a number of suppliers:

Spectrum Techniques
106 Union Valley Road
Oak Ridge, TN 37830
(865) 482-9937
Fax: (865) 483-0473
www.spectrumtechniques.com

Flinn Scientific
P.O. Box 219
Batavia, IL 60510
(800) 452-1261
Fax: 630-879-6962
www.flinnsci.com

Canberra Industries
800 Research Parkway
Meriden, CT 06450
(800) 243-3955
Fax: (203) 235-1347
www.canberra.com