Hello all, I simulated a radioactive decay of carbon-10 in scintillating beta-detector. However, the program is crashed when it was looking for fluorescence or Auger process for material with Z=5 (boron). See below. ------------------------------------- ---> End of event: 10000 G4AtomicTransitionMagare warning: No fluorescence or Auger for Z=5 Absorbed enrgy deposited locally G4AtomicTransitionMagare warning: No fluorescence or Auger for Z=5 Absorbed enrgy deposited locally *** Break *** segmentation violation -------------------------------------- Reading the GEANT4 Hypernews forum I have noted that similar problem has been reported by Dr. Igor Pshenichnov. As one of possible solution it has been suggested by Fan Lei that the G4AtomicDeexcitation process is only activated for elements existing in the material table, i.e. is was design for deexcitation of the target atoms in mind. So, I added material boron to the list of the material in my detector (however I do not use it in my geometry). -------------------------------------- Material: Boron density: 2.340 g/cm3 temperature: 273.15 K pressure: 1.00 atm RadLength: 22.516 cm ---> Element: B (B) Z = 5.0 N = 10.8 A = 10.81 g/mole ---> Isotope: B Z = 5 N = 10 A = 10.01 g/mole abundance: 19.90 % ---> Isotope: B Z = 5 N = 11 A = 11.01 g/mole abundance: 80.10 % ElmMassFraction: 100.00 % ElmAbundance 100.00 % -------------------------------------- The problem still remains, as GEANT crashes with the same message. Could you please look into this problem? Best wishes, Victor Golovko. August 15, 2006
Although the problem starts with radioactive decay, it seems to have its roots in the atomic de-excitation code, which is within the low energy electromagnetic category. I am referring it to the Low Energy EM coordinator who is more qualified to examine it.
Geant4 Atomic Relaxation handles elements with 5<Z<101; this is the same range of atomic numbers covered by the EADL data library, on which the model is based. These are the elements for which there are data for both the shell binding energies (necessary to calculate the energy of the relaxation products) and the transition probabilities from any atomic vacancy. All this is explained in the documentation. The Atomic Relaxation package should be used within its documented limits of validity. Best wishes, Maria Grazia Pia
