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Question doubts concerning grdm 

Keywords: doubts about grdm commands
Forum: Space Applications
Date: 29 Dec, 2005
From: Manju Sudhakar <Manju Sudhakar>

Hi, 
  I would like to simulate the decay of induced radio-isotopes when protons 
are incident on a space-borne gamma-ray detector, cosmic-ray protons.I want 
to model the detector background.To simulate radioactive decay, we need to 
use grdm.There are some aspects about it I don't understand.

1) the command /grdm/sourceTimeProfile <filename>
    
    as given in the manual, it is for defining the "source time profile"
I donot understand ... what does this mean ?? Why is it used ?? Is it 
mandatory ?? In the extended example "radioactivity/exrdm" in geant 4.7.0, 
in one of the macros "proton-b.mac" /grdm/sourceTimeProfile beam.data is a 
command.When I opened beam.data, the file looked like this 
0  1e6
60  0

Donot understand head or tail of this ... please help me get clarified on 
this point.


2) the command /grdm/decayBiasProfile <filename>

       What about this command ?In the extended example "radioactivity/exrdm" 
in geant 4.7.0, in the macro "proton-b.mac", there is a command 
/grdm/decayBiasProfile measures.data.And, when I opened it
1000     1
1100     0
3000     1
3100     0
1e5      1
1.1e5    0

    No clue to what this file means.

Could someone please explain all this to me clearly and in detail ?

With lots and lots of advance thanks 
Manju Sudhakar.

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