|Message: Re: Energy deposited by secondaries not adding up||Not Logged In (login)|
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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 ...