AW Singles Prob Y88 2015

Problem description:

The singles spectra production for the initial Y-88 activity is off by a factor of 2.

Right now the high energy line is a factor of 2 higher.

[math]N\left (\frac{1836}{898}\right ) =\frac{\frac{ UN(1836)}{.31}}{ \frac{UN(898)}{.78}}=\frac{5}{2} \frac{UN(1836)}{ UN(898)}=1 =[/math] Ratio

UCR[math]\equiv \frac{UN(1836)}{ UN(898)}=\frac{2}{5} = 0.4=[/math]ratio before efficiency correction

Days	[math]T_{1/2}[/math]	(898 keV) Raw	(1836 keV)Raw	UCR	(898 keV) Integral Eff Cor	(1836 keV) Integral Eff Cor	Ratio
108	1.01	1.364 [math]\pm 0.062[/math] Media:Run7022_898_raw.png	[math]\pm[/math] 0.048 Media:Run7022_1836_raw1.png	0.62	174.2 [math]\pm[/math] 13.24	269.8 [math]\pm[/math] 30.91	1.55
159	1.49	0.8697 [math]\pm 0.055 [/math] Media:Run7107_898_raw.png	[math]\pm[/math] 0.042 Media:Run7107_1836_raw.png	0.58	111.07 [math]\pm[/math] 9.753	160.8 [math]\pm[/math] 20.9	1.45
229	2.15	0.4733[math]\pm 0.058 [/math] Media:Run7203_898_raw_ratio3.png	[math]\pm[/math] 0.059 Media:Run7203_1836_raw_nocut.png	0.60	60.45 [math]\pm[/math] 8.272	90.48 [math]\pm[/math] 20.95	1.50
245	2.30	0.5807 [math]\pm 0.049 [/math] Media:Run7235_898_raw.png	[math]\pm[/math] 0.032 Media:Run7235_1836_raw.png	0.42	74.16 [math]\pm[/math] 7.718	78.52 [math]\pm[/math] 12.89	1.06

What is the background contribution to the above rates ( Background is all channels with rate < 0.1 Hz)

Days	[math]T_{1/2}[/math]	(898 keV) Background	(1836 keV) Background	UCR	Ratio
108	1.01	1.364 [math]\pm 0.062[/math] Media:Run7022_898_raw.png	0.8414 [math]\pm[/math] 0.048 Media:Run7022_1836_raw1.png	0.62	1.55
159	1.49	0.8697 [math]\pm 0.055 [/math] Media:Run7107_898_raw.png	0.5015 [math]\pm[/math] 0.042 Media:Run7107_1836_raw.png	0.58	1.45
229	2.15	0.4733[math]\pm 0.058 [/math] Media:Run7203_898_raw_ratio3.png	0.2822 [math]\pm[/math] 0.059 Media:Run7203_1836_raw_nocut.png	0.60	60.45 [math]\pm[/math] 8.272 1.50
245	2.30	0.5807 [math]\pm 0.049 [/math] Media:Run7235_898_raw.png	0.2449 [math]\pm[/math] 0.032 Media:Run7235_1836_raw.png	0.42	1.06

Efficiency corrected plot of the two activities as a function of days

A_W_thesis#Final_problems_to_sort_out