Cs-137 Half-life

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Cs-137 Integral Table

Days Integral Ln(Integral)
105 19.24 +/- 0.0875 2.956 +/- 0.0045
156 22.45 +/- 0.0854 3.111 +/- 0.0038
226 3.242 +/- 0.0108 1.176 +/- 0.0033
242 22.124 +/- 0.1474 3.097 +/- 0.0067

Certificate Half-life: 30.0 +/- 0.2 year

Cs-137 Halflife.png


Cs-137 Integral Table (Ratio from amplitude = 5.5)

Days Integral Ln(Integral)
105 19.24 +/- 0.0875 2.956 +/- 0.0045
156 22.45 +/- 0.0854 3.111 +/- 0.0038
226 17.942 +/- 0.0526 2.887 +/- 0.0029
242 22.124 +/- 0.1474 3.097 +/- 0.0067

Certificate Half-life: 30.0 +/- 0.2 year

Cs-137 Halflife ratio1.png


Cs-137 Integral Table (Ratio from integrals of second and fourth points = 6.8)

Days Integral Ln(Integral)
105 19.24 +/- 0.0875 2.956 +/- 0.0045
156 22.45 +/- 0.0854 3.111 +/- 0.0038
226 22.186 +/- 0.0467 3.0995 +/- 0.0021
242 22.124 +/- 0.1474 3.097 +/- 0.0067

Certificate Half-life: 30.0 +/- 0.2 year

Cs-137 Halflife ratio2.png


Cs-137, Co-60, and Mn-54 Half-lives

Cal Halflife.png

Cs-137 Certificate Half-life: 30.0 +/- 0.2 year

Co-60 Certificate Half-life: 5.271 +/- 0.001 year

Mn-54 Certificate Half-life: 312.20 +/- 0.07 days


A_W_thesis