Commonly used isotope information

  • Carbon-14 (14C)
    • Radioactive Half-life: 5730 years
    • Decay Mechanism: Beta
    • Major Radiation: Beta
    • Energy: 0.156 MeV (156 keV) maximum energy
    • Radiation Detection: Thin window GM, LSC (LS) counting
    • Radiation Hazard: Normally no external radiation hazard
    • Shielding: Not necessary, normal laboratory safety precaution
  • Sodium-22 (22Na)
    • Radioactive Half-life: 2.62 years
    • Decay Mechanism: Positron
    • Major Radiation: gamma
    • Energy: 1.275, 0.511 MeV
    • Radiation Detection: GM, ion chamber
    • Radiation Hazard: External radiation hazard
    • Shielding: Lead, high density material
  • Phosphous-32 (32P)
    • Radioactive Half-life: 14.3 days
    • Decay Mechanism: Beta
    • Major Radiation: Beta
    • Energy: 1.709 MeV maximum energy
    • Radiation Detection: Thin window GM, LS counting
    • Radiation Hazard: Beta (possible x-ray radiation)
    • Shielding: 1 cm Lucite
  • Phosphous-33 (33P)
    • Radioactive Half-life: 25 days
    • Decay Mechanism: Beta
    • Major Radiation: Beta
    • Energy: 0.248 MeV (248 keV) maximum energy
    • Radiation Retection: Thin window GM, LSC
    • Radiation Hazard: Normally no external radiation hazard
    • Shielding: Not necessary, normal laboratory safety precaution
  • Sulfur-35 (35S)
    • Radioactive Half-life: 87.9 days
    • Decay Mechanism: Beta
    • Major Radiation: Beta
    • Energy: 0.167 MeV (167 keV) maximum energy
    • Radiation Detection: Thin window GM, LSC
    • Radiation Hazard: Normally no external radiation hazard
    • Shielding: Not necessary, normal lab. safety precaution
  • Calcium-45 (45Ca)
    • Radioactive Half-life: 165 days
    • Decay Mechanism: Beta
    • Major Radiation: Beta
    • Energy: 0.252 MeV (252 keV) maximum energy
    • Radiation Detection: Thin window GM, LSC
    • Radiation Hazard: Little external radiation hazard
    • Shielding: Not necessary, normal lab. safety precaution
  • Scandium-46 (46Sc)
    • Radioactive Half-life: 83.9 days
    • Decay Mechanism: Beta
    • Major Radiation: Gamma
    • Energy: 1.120 and 0.889 MeV
    • Radiation Detection: GM, Ion chamber
    • Radiation Hazard: External radiation hazard
    • Shielding: Lead, high density material
  • Chromium-51 (51Cr)
    • Radioactive Half-life: 27.8 days
    • Decay Mechanism: Electron capture
    • Major Radiation: Gamma
    • Energy: 0.320 MeV (320 keV)
    • Radiation Detection: GM, ion chamber
    • Radiation Hazard: External radiation hazard
    • Shielding: Lead, high density material
  • Iron-59 (59Fe)
    • Radioactive Half-life: 45.6 days
    • Decay Mechanism: Beta
    • Major Radiation: Gamma
    • Energy: 1.292, 1.095 MeV
    • Radiation Detection GM, ion chamber
    • Radiation Hazard External radiation hazard
    • Shielding: Lead, high density material
  • Nickel-63 (63Ni)
    • Radioactive Half-life: 100 years
    • Decay Mechanism: Beta
    • Major Radiation: Beta
    • Energy: 0.067 MeV (67 keV) maximum energy
    • Radiation Detection: Liquid scintillation counting
    • Radiation Hazard: No external radiation hazard
    • Shielding: Not necessary, normal lab. safety precaution
  • Selenium-75 (75Se)
    • Radioactive Half-life: 120 days
    • Decay Mechanism: Electron capture
    • Major Radiation: Gamma
    • Energy: 0.401, 0.280, 0.265, 0.136, 0.121 MeV
    • Radiation Detection: GM, Ion chamber
    • Radiation Hazard: External radiation hazard
    • Shielding: Lead, high density material
  • Iodine-125 (125I)
    • Radioactive Half-life: 60 days
    • Decay Mechanism: Electron capture
    • Major Radiation: Gamma
    • Energy: 0.035, 0.031, 0.027 MeV (35, 31, and 27 keV)
    • Radiation Detection: GM, Ion chamber
    • Radiation Hazard: External radiation hazard
    • Shielding: Lead, high density material
  • Iodine-131 (131I)
    • Radioactive Half-life: 8.1 days
    • Decay Mechanism: Beta
    • Major Radiation: Gamma
    • Energy: 0.364, 0.284, 0.030 MeV (364, 284, 30 keV)
    • Radiation Detection: GM, Ion chamber
    • Radiation Hazard: External radiation hazard
    • Shielding: Lead, high density material