Agent Name

Fermium

CAS Number

7440-72-4

Formula

Fm

Major Category

Physical/Radiation

Category

Radionuclides

Sources/Uses

A radioactive element discovered in 1952 in the debris from a nuclear detonation; Known isotopes include Fm-242 to Fm-259.[Merck Index] The 16 isotopes have short half-lives. The longest half-life is 100.5 days (Fm-257). [http://periodic.lanl.gov/elements/100.html]

Comments

Most Important Radionuclide: Fm-257 Source: Neutron bombardment of plutonium; Half-Life: 100.5 days Decay Mode: Alpha Lung Clearance Half-Time: Weeks Internal Toxicity: Very High Annual Limit on Intake: 0.0002 mCi [See Glossary for references.] See "Radiation, ionizing."

Reference Link

LANL: Fermium

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