AW Singles Prob Y88 2015

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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)

(Set energy window to [math] \mu \pm 3 \sigma [/math])


Days [math]T_{1/2}[/math] Energy (keV) Raw Integral Background Integral Ratio (Raw/Background) Sub Integral
108 1.01 898 1.34 0.0891 15.04 1.252
1836 0.8524 0.0200 42.62 0.8325 0.67
159 1.49 898 0.9576 0.1068 8.966 0.8501
1836 0.5300 0.0299 17.73 0.5007 .58
229 2.15 898 0.6682 0.2094 3.191 0.4589
1836 0.3539 0.0799 4.429 0.2740 0.59
245 2.30 898 0.541 0.0803 6.737 0.4595
1836 0.3033 0.0636 4.769 0.2414 0.52


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

Integral eff boosted.png


Ntuple commands

r7022 (0.002786)
TH1F *r7022=new TH1F("r7022","r7022",2200,0,4400)
ntuple->Draw("ADC7*0.599803-50.9271 >>r7022");
TH1F *N7022=new TH1F("N7022","N7022",2200,0,4400)
N7022->Add(r7022,0.002786);
r7107 (0.003534)
TH1F *r7107=new TH1F("r7107","r7107",2200,0,4400)
ntuple->Draw("ADC7*0.601126-51.3834 >>r7107");
TH1F *N7107=new TH1F("N7107","N7107",2200,0,4400)
N7107->Add(r7107,0.002786);

A_W_thesis#Final_problems_to_sort_out