12/06/2026
Dose rate (Dr)
The rate of exposure to alpha (α), beta (β), and gamma (γ) radiation from radioisotopes of potassium (K), uranium (U), thorium (Th), rubidium (Rb), and incoming cosmic rays (attenuated for depth below surface). Expressed in Gray (Gy) per thousand years (Gy/ka), (1 Gy = 1 Joule/kg).
💡Discover more in our Learning Hub: vicus.net.au/learning-hub