Answers
J. The only requerement to solve for half life is that At is One half of Ao .. If we set Ao=1 then A= 1 / 2 = 0.5
2. Using the values of Ao and At we have kt 1 1 2 - Jekt » ekt = 1/2 1 → logekt - log 1/2 -> kt = log2 log!/2 -) t = k - t-ts/2 ln (0.5) k
No Let us try to calculate tsiz from the given data At t= 51s the count is 1544 counts/13 At t- 1985. the count gets halved i.
L. 774 (approx) counts / 13. t 312 1985-515 -] 475
::/61 ) en (0.5) ln (0.5) t 3/2 ln (0.5) 147 -j. s 0.0045-1
.
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