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.

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

UCR$\equiv \frac{UN(1836)}{ UN(898)}=\frac{2}{5} = 0.4=$ratio before efficiency correction

Days	$T_{1/2}$	(898 keV) Sub	(1836 keV)Sub	UCR	(898 keV) Integral Eff Cor	(1836 keV) Integral Eff Cor	Ratio
108	1.01	1.364 $\pm 0.062$ Media:Run7022_898_raw.png	$\pm$ 0.048 Media:Run7022_1836_raw1.png	0.62	174.2 $\pm$ 13.24	269.8 $\pm$ 30.91	1.55
159	1.49	0.8697 $\pm 0.055$ Media:Run7107_898_raw.png	$\pm$ 0.042 Media:Run7107_1836_raw.png	0.58	111.07 $\pm$ 9.753	160.8 $\pm$ 20.9	1.45
229	2.15	0.4733$\pm 0.058$ Media:Run7203_898_raw_ratio3.png	$\pm$ 0.059 Media:Run7203_1836_raw_nocut.png	0.60	60.45 $\pm$ 8.272	90.48 $\pm$ 20.95	1.50
245	2.30	0.5807 $\pm 0.049$ Media:Run7235_898_raw.png	$\pm$ 0.032 Media:Run7235_1836_raw.png	0.42	74.16 $\pm$ 7.718	78.52 $\pm$ 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 $\mu \pm 3 \sigma$)

Run #	Days	$T_{1/2}$	Energy (keV)	Raw Integral	Background Integral	Background (Left)	Background (Right)	Ratio (Raw/Background)	Sub Integral	Sub Back (Left)	Sub Back (Left)	Ratio
7022	108	1.01	898	1.34	0.0891	0.2145	0.3148	15.04	1.252	0.04951	0.08752
			1836	0.8524	0.0200	0.02507	0.01393	42.62	0.8325			0.67
7107	159	1.49	898	0.9576	0.1068	0.2332	0.1767	8.966	0.8501	0.03603	0.02687
			1836	0.5300	0.0299	0.01413	0.02827	17.73	0.5007			.58
7203	229	2.15	898	0.6682	0.2094	0.3165	0.8652	3.191	0.4589
			1836	0.3539	0.0799	0.02119	0.7627	4.429	0.2740			0.59
7235	245	2.30	898	0.541	0.0803	0.2951	0.2459	6.737	0.4595	0.07145	0.0648
			1836	0.3033	0.0636	0.01639	0.02869	4.769	0.2414			0.52

Weighted Averaged Background:

898: 0.0255 +/- 0.0206

1836: 0.0072 +/- 0.0120

Run #	Days	$T_{1/2}$	Energy (keV)	Raw Integral	Sub Integral	UCR	Amp (raw)	Amp-UCR (raw)	Amp (sub)	Amp-UCR (sub)
7022	108	1.01	898	1.34	1.238	0.65	$0.7035 \pm 0.9116$	0.44	$0.6780 \pm 1.527$	$0.45 \pm 1.44$
			1836	0.8524	0.8092		$0.3115 \pm 0.6806$		$0.3043 \pm 0.6895$
7107	159	1.49	898	0.9576	0.8301	0.59	$0.3923 \pm 0.2435$	0.45	$0.3668 \pm 0.3737$	$0.46 \pm 2.17$
			1836	0.5300	0.4868		$0.1757 \pm 0.7528$		$0.1685 \pm 0.7747$
7235	245	2.30	898	0.541	0.4645	0.53	$0.2930 \pm 0.6434$	0.25	$0.2675 \pm 0.6259$	$0.25 \pm 0.46$
			1836	0.3033	0.2457		$0.0740 \pm 0.0371$		$0.06677 \pm 0.1162$

Run #	Days	$T_{1/2}$	Energy (keV)	Amp	Amp-UCR
7022	108	1.01	898	$1.11421 \pm 0.057009$	$0.4425 \pm 0.0431$
			1836	$0.493043 \pm 0.040830$
7107	159	1.49	898	$0.558352 \pm 0.044758$	$0.4746 \pm 0.0613$
			1836	$0.265019 \pm 0.026870$
7235	245	2.30	898	$0.434429 \pm 0.042097$	$0.3396 \pm 0.0631$
			1836	$0.147541 \pm 0.023407$

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);

r7235 ()

TH1F *r7235=new TH1F("r7235","r7235",2200,0,4400)

ntuple->Draw("ADC7*0.61389-50.2085 >>r7235");

TH1F *N7235=new TH1F("N7235","N7235",2200,0,4400)

N7235->Add(r7235,0.004098);

A_W_thesis#Final_problems_to_sort_out