Y-88 Half-life

898 keV Singles

Averaging over the half-life fits: 100.77 +/- 37.397

898 keV Singles Using Ratios

898 keV Coincidence

Averaging over the half-life fits: 4630.602 +/- 7728.132

Using the Event Number cut on run 7236

Averaging over the half-life fits: 159.105 +/- 65.381

898 keV Integral Table (With Event Cuts)

Days	[math]T_{1/2}[/math]	Trig	Integral
47	0.44	coin	0.0214 +/- 1.535e-4
105	0.98	sing	1.364 +/- 0.0457
		coin	0.0052 +/- 9.117e-5
156	1.46	sing	0.8697+/- 0.0159
		coin	0.0042 +/- 1.103e-4
226	2.12	sing	0.6069 +/- 0.0184
		coin	0.0021 +/- 4.305e-5
242	2.27	sing	0.5807 +/- 0.0457
		coin	0.0014 +/- 8.033e-5

Integral vs Time for singles:

Use the p-values from the regression analysis to decide which fit is better.  The smaller the p-value the better the fit.

Black Line:y=-0.00614762*t+0.90238 Half-life:162.7+/- 18.6 days

Green Line: y=-0.00626604*t+0.881547 Half-life: 159.6 +/- 8.79 days

Integral vs Time for coincidence:

Black Line: y=-0.00926265*t-4.17913 Half-life:107.96 +/- 20.3 days

Green Line: y=-0.00788375*t-4.36373 Half-life: 126.84 +/- 3.41 days

1836.1 keV Integral Table (With Event Cuts)

Days	[math]T_{1/2}[/math]	Trig	Integral
47	0.44	coin	0.0130 +/- 1.168e-4
105	0.98	sing	0.8414 +/- 0.00897
		coin	0.0062 +/- 6.463e-5
156	1.46	sing	0.5015 +/- 0.0024
		coin	0.0046 +/- 1.742e-5
226	2.12	sing	0.1934 +/- 0.0115
		coin	0.0020 +/- 7.250e-5
242	2.27	sing	0.2449 +/- 0.0084
		coin	0.0017 +/- 2.191e-4

Black Line: y=-0.0102535*t+0.890494 Half-life:97.53 +/- 18.1 days

Green Line: y=-0.00989653*t+0.85652 Half-life: 101.05 +/- 1.93 days

Black Line: y=-0.0098011*t-3.978 Half-life:102.03 +/- 10.156 days

Green Line: y=-0.00689077*t-4.31681 Half-life: 145.12 +/- 4.130 days

Cs-137 Half-life

A_W_thesis