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Forum: Biasing and Scoring
Re: Question Energy deposited by secondaries not adding up
Re: None Re: Energy deposited by secondaries not adding up (michel maire)
Re: Question Re: Energy deposited by secondaries not adding up
Date: Jan 18, 10:40
From: michel maire <michel maire>

On Fri, 18 Jan 2019 17:25:48 GMT, fceraudo wrote:
> Hello,
> 
> The example gives me results fully compatible to yours within the
> uncertainties (file attached). However, as long as my case is concerned,
> when I try to visualize the histograms of the deposited energy, I get
> the two attached files.
> 
> In root_10keV_700um.gif, you can see the histogram of the deposited
> energy for all the hits (step-GetTotalDepositedEnergy()), all events
> together. The production cut is the default one at 700 um. At this
> point, I personally cannot tell if something is wrong: I see a large
> peak at 1.8 keV, i.e. the Si K-edge energy, which I guess is expected
> (...?), and all the deposited energies are below 10 keV, which is
> definitely expected, since we are dealing with secondaries.
> 
> When I try to combine the hits according to their event ID, I obtain
> screen_10keV_700um.png, which shows a peak just below 10 keV (which
> already seems low, given the thickness of the detector, but now it is
> not my main concern). In addition to this, we see a sort of "background"
> around the peak as well as two smaller peaks, apparently symmetric with
> respect to 10 keV, one of which is above 10 keV! This means that the
> total deposited energy is higher than the primary energy. In
> screen_10keV_1um.png, the same histogram is plotted, this time after
> applying a region with production but of 1 um to the logical volume of
> the detector.
> 
> How is this possible? What are those symmetric peaks?
> 

 I cannot understand your plots.
 It seems that you have a double counting somewhere ...

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