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S3-LEB-LPC
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 Sat Mar 13 18:37:01 2021, Emmanuel C, e793s, OFFLINE, General, Fixed, , Efficiency gamma AGATA
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 Thu Mar 18 16:25:56 2021, Emmanuel C, e793s, OFFLINE, General, Fixed, , Efficiency gamma AGATA --- real measurement run70
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Tue Mar 23 10:22:48 2021, Emmanuel C, e793s, OFFLINE, General, Fixed, , Efficiency gamma AGATA --- real measurement run70 
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Message ID: 6244
Entry time: Tue Mar 23 10:22:48 2021
In reply to: 6239
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| Author: |
Emmanuel C |
| ExpNbr: |
e793s |
| Type: |
OFFLINE |
| Category: |
General |
| Status: |
Fixed |
| Target-Source: |
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| Subject: |
Efficiency gamma AGATA --- real measurement run70 |
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I have been working on the high energy response.
The point is that we do not have source measurement beyond 2 MeV to constrain the fit.
In the attached file, the experimental points are the measured from run 70 in 152Eu source. The fit is then extrapolated up to high energy.
I have simulated the efficiency at 3.5 MeV in GEANT4 including real geometry, missing channels, unefficiency of capsules etc.... The overall agreement was checked on the 1408 line. The 3.5 MeV simulated point is shown. It disagrees strongly with the extrapolation. The blue fit includes the simulated point. It doesn't change the efficiency evaluation < 1.5 MeV but correct the high energy response.
Below, updated parameters
p0 -6.34543e+01
p1 4.24746e+01
p2 -1.00304e+01
p3 1.03468e+00
p4 -3.97076e-02
TF1 *fit_1 = new TF1("fit_1","TMath::Exp([0]+[1]*TMath::Log(x)+[2]*pow(TMath::Log(x),2.0)+[3]*pow(TMath::Log(x),3.0)+[4]*pow(TMath::Log(x),4.0))",10,5000); //NRJ traite en keV |
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