How to make an energy histogram of deposited energy?

[pvoytas]

Hi,
My short term goal in learning gears is to make a simple CsI detector and generate a spectrum of energy deposited, e.g. a histogram of N(E) vs E. From some things written in the paper describing GEARS, it sounds like this should be possible, but I haven't found a working example that does this. Looking at the Geant4 documentation on doing scoring from the command UI, I have not gotten any further.
Barring being able to generate a histogram directly, if there's a way to dump energy deposited event-by-event, can can build a histogram offline.

Any help/input appreciate,
-Paul

[jintonic]

GEARS provides two ways to achieve this. One is to record total energy deposition in a volume in a ntuple for offline histograming. The other is to use scorer as you mentioned, which generates a histogram with predefined binning.

Option 1 working example: https://github.com/jintonic/gears/tree/master/tutorials/output

Option 1 documentation:

• https://github.com/jintonic/gears/tree/master/tutorials/output#total-energy
• https://github.com/jintonic/gears/tree/master/tutorials/detector#sensitive-volume

Option 2 working example:

• https://github.com/jintonic/mingle/blob/scorer/run.mac
• https://github.com/jintonic/mingle/blob/scorer/detector.tg
  Note that this working example is for https://github.com/jintonic/mingle/. To make it work for GEARS, you just need to add /geometry/source detector.tg at the beginning of run.mac