Radionuclide Safety Guideline for Fe59

Physical Data

  • Radiation -  Gammas/X-rays: 192 keV (3% abundance); 1099 keV (56%),  1292 keV (44%)
  • Beta - 131 keV (1%, 273 keV (46%), 466 keV (53%)

Half-Life 

  • Physical: 44.5 days
  • Biological: ~ 1.7 days (ingestion)
  • Effective: ~ 1.7 days (varies)

Range

  • Beta: 115 cm in air (unshielded)

External, Skin and Eye Hazard

  • Unshielded exposure rate at 1 cm from a 1mC point source; 6.18 R/h

Internal Hazard

  • Critical Organ: Spleen, (blood)

Shielding

  • 15 mm of lead will reduce original exposure intensity by 50%.

Safety Guidelines

  • Wear a lab coat and disposable gloves.
  • Whole body and ring dosimeters are required to be worn by individuals working with > 1mCi amount of Fe59.
  • Store Fe59 behind lead shielding.
  • Practice routine operations to improve dexterity and speed before using Fe59.

 

Updated 1/2013