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Dear Eleni, Are you using Geant 10.0 beta ? Else the isotopes are not available. I am not sure whether the reaction you are interested in is included in the neutron library in the beta release - that is whether the library has it and whether our code is able to do it. My colleague informs me that the Geant4 10.0 full release includes this type of reaction, so we expect that you should be able to see it. The release is planned for this Friday, 6th December. It will be very good if you can prepare a test code, to check the reaction in release 10.0. ( The testing code should be the same between releases. ) How are you scoring ? Have you tried to use the Geant4 sensitive detectors ? I suggest that you look at the relevant chapters in the Geant4 Users Guide for Application developers. If you write your own sensitive detector class (starting from an existing one) it is possible to examine the results of any reaction, but also the full details of any track in flight. A second way, which we recommend less but is useful if you are trying to score in all volumes in the same way: is to use a SteppingAction. It also has access to all information about the primary track and the current step (which includes the secondary.) Best regards, Giannis =================================================== John Apostolakis, PH Department, CERN SFT (SoFTware for Experiments) Group On Dec 4, 2013, at 8:15 AM, Eleni wrote: > > *** Discussion title: Biasing and Scoring > > Hello all, > > I am studying the neutron capture reaction in various materials and i want to score the ground and metastable states. For example in a Cd > target I want to see the reaction Cd110(n,g)Cd111m. How can I do that? I am using the QSGP_BIC_HP library and when i am running G4 the produces > isotopes are the ones in ground state > > Thank you in advance > > ------------------------------------------------------------- > Visit this GEANT4 at hypernews.slac.stanford.edu message (to reply or unsubscribe) at: > http://hypernews.slac.stanford.edu/HyperNews/geant4/get/biasing_scoring/103.html