Radionuclide Safety Guidleines for Gd-153

Physical Data

  • Radiation  Major Gammas: 0.070 MeV (2.57%), 0.097 MeV (31.3%), 0.103 MeV (22.2%)
  • Decay Mode: Electron Capture

Half-Life

  • Physical - 240.4 days

External Hazard

  • The gamma exposure rate at 1 cm from 1mCi is 872 mR/hr.
  • The range of the 0.103 MeV beta is 0.012 cm in lucite and 0.0057 cm in glass.

Internal Hazard

  • Critical Organ - Whole and Bone Surface

Safety Guidelines

  • Use shielding lead or leaded Plexiglas to minimize exposure.
  • Whole body and ring dosimeters are required.
  • Wear a lab coat and disposable gloves.

 

updated 1/2013