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)

(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

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