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Dosimetry Request: New

All workers using radioisotopes or radiation-producing machines must have the appropriate radiation safety training before starting work. For information about training please go to the EHS Training Courses Pages.

Personal dosimeters are worn only while working at Michigan State University and shall not be taken off campus or worn at other institutions. If you are assigned a dosimeter, wear only your own and do not loan, borrow or share dosimeters with other workers. Dosimeters are for monitoring any occupational dose received at MSU and do not provide any shielding or protection from radiation exposure.

Dosimetry for workers using beta emitting isotopes

  • High energy emitters (energies >= 0.5 MeV) (Examples: 32P, 36Cl, 90Sr)
    • Extremity (ring) badge for persons handling less than 10 mCi per container
    • Body and extremity (ring) badge for persons handling 10 mCi or more per container
  • Low energy emitters (energies < 0.5 MeV) (Examples: 35S, 14C, 3H)
    • No dosimetry required; the energies of these isotopes are too low to penetrate the coating on the dosimeter

Dosimetry for workers using gamma emitting isotopes

  • High energy emitters (Examples: 111In, 51Cr, 22Na)
    • Body and extremity (ring) badge
  • Low energy emitters (Example: 125I)
    • Body badge for persons handling more than 100 µCi per container
    • No dosimeter for persons handling less than 100 µCi per container

Proper use of dosimeters

  • Store away from radiation sources
  • Do not take them home
  • Wear only while working for Michigan State University
  • Wear body badges between the collar and waist
  • Wear ring badges on dominant hand and inside gloves facing up

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