Validation of Tritium Calibration Curve in CIEMAT/NIST Activity Measurement Using Non Linear Least Squared Fittings and Calculations of the Half-Life and Decay Constant of Potassium-40. J. Nig. Soc. Phys. Sci. [Internet]. 2022 Aug. 20 [cited 2024 Dec. 30];4(3):621. Available from: https://journal.nsps.org.ng/index.php/jnsps/article/view/621