Решение задачи по физике раздел 58 пункт 92 квантовая

92. At a time counter radiation disposed proximate to the fluorine-18 with short half-life of the drug, fixed I1 = 77 samples per second. After a time τ = 14 min readings reduced to I2 = 70 samples per second. Determine the half-life of fluorine-18

Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)