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CHIPS photo fission

CHIPS photo fission

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CHIPS photo fission

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  1. CHIPS photo fission Mikhail Kosov, CERN G4 hadron meeting, 25.05.2011

  2. Introduction (not implemented to the Open Code Geant4) • The CHIPS fission and fusion (n,g) cross-sections at low energies for neutrons have been presented last year. • The new step: photo-fission reactions including cross-sections and the reaction process G4QFission, which works for any projectile (Algorithm of Compound Fission). • This development is important mostly for simulation of heavy nuclide transmutation, but it fragments more materials with A<210 too (e.g. Lead). Lack of the photo-nuclear fragmentation for Lead was reported by JLab. • The CHIPS photo-nuclear cross-sections (the same as all other CHIPS cross-sections) are parameterized functions and not evaluated tables as in other DB’s. • CHIPS is compared with DB’s: TENDL (TENDL-2009), ENDF (ENDF/B-VII.0), and JENDL (JENDL/PD-2004). CHIPS photo fission

  3. CHIPS Isotope coverage (Jendl, Tendl, Endf) CHIPS photo fission

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  20. Conclusion • The CHIPS photo-fission cross-section functions are close to the estimates made by authors of other DB’s. • The CHIPS cross-sections have functional extrapolation to higher energies (E > 20 MeV), which can be important for simulation of photo-nuclear reactions (e.g. Lead). • The heavy radioactive isotopes are mostly covered by the TENDL-2009 DB, whilst for stable isotopes (A<210), because of the high threshold of the reaction, only a few JENDL/PD-2004 estimates exist. CHIPS covers all heavy stable isotopes (Lead is the most important, no JENDL!) • The fusion and fission cross-sections and generators can not be distributed in the open code form, such as Geant4. At present they are included in the CUDA GPU CHIPS2 simulation toolkit, which is not an open code project. CHIPS photo fission