GAMOS 5.1.0 User's Guide | ||
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These histograms are related to the distance between the line joining two gammas originated at the positron annihilation and the vertex position, at the moment of the gamma creation and when they hit the sensitive detector. Also other histograms about these two gammas are provided for further information. They are produced if the user action DetHistosGammaDist is activated with the command
/gamos/userAction DetHistosGammaDist.
The name of all these histograms starts with "NHGammaDist: " and all are written in the file NHGammaDist.root/csv/txt.
The histograms are the following:
Angle between the direction of the two gammas when they are created ("angle between gammas at vertex (deg)")
Angle between the direction of the two gammas when they enter the sensitive detector ("angle between gammas at entering SD (deg)")
Distance of closest approach between vertex and the line joining the vertex points of the two gammas ("DCA orig from Gamma vertex (mm)")
Distance of closest approach between vertex and the line joining the points where the gammas enter the sensitive detectors ("DCA orig from Gamma entering SD (mm)")
Z position of vertex of gamma if it reaches the sensitive detector ("Orig Pos Z if Gamma reaches SD (mm)")
R position of vertex of gamma if it reaches the sensitive detector ("Orig Pos R if Gamma reaches SD (mm)")
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PET histograms: positrons | Up | SPECT application |