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Nuclear & Radiochemistry

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Nuclear & Radiochemistry

Radiolysis

The chemical decomposition of a substance caused by ionising radiation.

H₂O →(radiation) H· + OH· Dimensionless
Nuclear & Radiochemistry

Radiometric Dating

The general technique of determining the age of a sample from the decay of a radioactive nuclide it contains.

t = (1/λ) ln(1 + D/P) years
Nuclear & Radiochemistry

Radiopharmaceutical

A radioactive compound administered to a patient for diagnosis or treatment.

MBq
Nuclear & Radiochemistry

Radiotherapy

The medical use of ionising radiation to destroy cancerous tissue.

Gy
Nuclear & Radiochemistry

Scintillation Counter

A detector in which radiation causes a material to emit flashes of light that are counted and measured.

counts/s
Nuclear & Radiochemistry

Secular Equilibrium

The steady state reached when a long-lived parent supports a short-lived daughter at constant activity.

λ₁N₁ = λ₂N₂ Bq
Nuclear & Radiochemistry

Sievert

The SI unit of equivalent dose, weighting absorbed dose by the biological damage the radiation type causes.

H = D × w_R Sv
Nuclear & Radiochemistry

Strong Nuclear Force

The short-range attractive force that binds protons and neutrons together within the nucleus.

N
Nuclear & Radiochemistry

Thermonuclear Reaction

A fusion reaction sustained by the extremely high temperatures of the reacting material itself.

K
Nuclear & Radiochemistry

Transmutation

The conversion of one element into another through a change in the number of protons in the nucleus.

¹⁴N + ⁴He → ¹⁷O + ¹H Dimensionless
Nuclear & Radiochemistry

Transuranium Elements

The synthetic elements with atomic numbers greater than 92, beyond uranium in the periodic table.

Z > 92 Dimensionless
Nuclear & Radiochemistry

Uranium–Lead Dating

A radiometric method that determines the age of very old rocks from the ratio of uranium to its lead decay products.

²³⁸U → ²⁰⁶Pb (4.47 Ga) years