# Difference between revisions of "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.

Ratio

UCRratio before efficiency correction

 Days (898 keV) Raw (1836 keV)Raw UCR (898 keV) Integral Eff Cor (1836 keV) Integral Eff Cor Ratio 108 1.01 1.364 Media:Run7022_898_raw.png 0.048 Media:Run7022_1836_raw1.png 0.62 174.2 13.24 269.8 30.91 1.55 159 1.49 0.8697 Media:Run7107_898_raw.png 0.042 Media:Run7107_1836_raw.png 0.58 111.07 9.753 160.8 20.9 1.45 229 2.15 0.4733 Media:Run7203_898_raw_ratio3.png 0.059 Media:Run7203_1836_raw_nocut.png 0.60 60.45 8.272 90.48 20.95 1.50 245 2.30 0.5807 Media:Run7235_898_raw.png 0.032 Media:Run7235_1836_raw.png 0.42 74.16 7.718 78.52 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 )

 Run # Days 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: 0.0254899

1836: 0.00719059

 Run # Days Energy (keV) Raw Integral Sub Integral UCR 7022 108 1.01 898 1.34 1836 0.8524 7107 159 1.49 898 0.9576 1836 0.5300 7235 245 2.30 898 0.541 1836 0.3033

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)