Message: Re: Relation between RESOLUTIONSCALE and intrinsic energy resolution Not Logged In (login)
 Next-in-Thread Next-in-Thread
 Next-in-Forum Next-in-Forum

Disagree Re: Relation between RESOLUTIONSCALE and intrinsic energy resolution 

Forum: Processes Involving Optical Photons
Re: Question Relation between RESOLUTIONSCALE and intrinsic energy resolution (Poer)
Re: Sad Re: Relation between RESOLUTIONSCALE and intrinsic energy resolution (Poer)
Re: Feedback Re: Relation between RESOLUTIONSCALE and intrinsic energy resolution (Gumplinger Peter)
Re: Note Re: Relation between RESOLUTIONSCALE and intrinsic energy resolution (Aram Teymurazyan)
Date: 01 Nov, 2013
From: Gumplinger Peter <Gumplinger Peter>

Hi Aram,

> I believe part of the issue here is that SCINTILLATIONYIELD has a unit
> and RESOLUTIONSCALE has no unit (or at least most people, including me,
> think of it as unitless).

Correct

> so if one uses
> 
> AddConstProperty("SCINTILLATIONYIELD",32./keV); or
> AddConstProperty("SCINTILLATIONYIELD",32000./MeV);
> 
> and a RESOLUTIONSCALE of anything but 1.0, the results will be wildly
> different.

Have you actually seen this happen? Don't believe it - the code reads:

MeanNumberOfPhotons = ScintillationYield*TotalEnergyDeposit;

G4double sigma = ResolutionScale * std::sqrt(MeanNumberOfPhotons);

NumPhotons = G4int(G4RandGauss::shoot(MeanNumberOfPhotons,sigma)+0.5);

TotalEnergyDeposit has unit 'energy' and so MeanNumberOfPhotons comes out to be the same no matter how you have specified "SCINTILLATIONYIELD"; e.g. as 32./keV or 32000./MeV.

I just verified this with OpNovice (formerly N06).

Peter

Inline Depth:
 1 1
 All All
Outline Depth:
 1 1
 2 2
 All All
Add message: (add)

1 None: Re: Relation between RESOLUTIONSCALE and intrinsic energy resolution   (Aram Teymurazyan - 01 Nov, 2013)
 Add Message Add Message
to: "Re: Relation between RESOLUTIONSCALE and intrinsic energy resolution"

 Subscribe Subscribe

This site runs SLAC HyperNews version 1.11-slac-98, derived from the original HyperNews