DPG, 11.03.08 Fragment formation in low energy proton-induced Fragment formation in low energy proton-induced reactions reactions within a hybrid BUU+SMM approach within a hybrid BUU+SMM approach Th. Gaitanos, H. Lenske, U. Mosel Th. Gaitanos, H. Lenske, U. Mosel Introduction Introduction Theoretical description Theoretical description Non-equlibrium stage (GiBUU) Asymptotic equilibrium stage (SMM) Hybrid approach (GiBUU+SMM) Applications Benchmark p+X@SIS/GSI energies Final remarks Final remarks
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Fragment formation in low energy proton-induced reactions within a hybrid BUU+SMM approach
Fragment formation in low energy proton-induced reactions within a hybrid BUU+SMM approach. Th. Gaitanos, H. Lenske, U. Mosel. Introduction Theoretical description Non-equlibrium stage (GiBUU) Asymptotic equilibrium stage (SMM) Hybrid approach (GiBUU+SMM) Applications - PowerPoint PPT Presentation
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DPG, 11.03.08
Fragment formation in low energy proton-induced reactions Fragment formation in low energy proton-induced reactions within a hybrid BUU+SMM approachwithin a hybrid BUU+SMM approach
Th. Gaitanos, H. Lenske, U. MoselTh. Gaitanos, H. Lenske, U. Mosel
Spallation reactions („small“ excitation of residual nucleus resp. to its ground state)
useful tool to theoretically study/test long-time scales of fragmentation process
Spallation reactions („small“ excitation of residual nucleus resp. to its ground state)
useful tool to theoretically study/test long-time scales of fragmentation process
ApplicationsApplications
•Study of hypernuclei (2nd talk): HIC@SIS (HypHI)
•In future: PANDA (pbar+X), J-PARC (p+X@50GeV, X+X@20AGeV)
ApplicationsApplications
•Study of hypernuclei (2nd talk): HIC@SIS (HypHI)
•In future: PANDA (pbar+X), J-PARC (p+X@50GeV, X+X@20AGeV)
Theor. description of Low energy hadron-induced Theor. description of Low energy hadron-induced reactionsreactions
Theor. description of Low energy hadron-induced Theor. description of Low energy hadron-induced reactionsreactions
Non-(pre-)equilibrium first phaseNon-(pre-)equilibrium first phaseNon-(pre-)equilibrium first phaseNon-(pre-)equilibrium first phase Asymptotic final stateAsymptotic final stateAsymptotic final stateAsymptotic final state
Low-energy proton-induced reactionsLow-energy proton-induced reactions Residual system under stable conditions no compression/expansion effects, no radial flow effects Wide selection of experimental data Useful tool to study transport models including fragmentation
Hybrid approach (GiBUU+SMM)Hybrid approach (GiBUU+SMM) Initial stage: StableStable ground state pre-equilibrium dynamics: relativistic GiBUU asymptotic equilibrated stage: statistical decay by means of SMM
Comparison with a wide selection of exp. data Comparison with a wide selection of exp. data Global characteristics and details fairly well reproduced
Future/under progress developmentsFuture/under progress developments Gradient terms in meson field equations (A.Larionov) Extended for iso-vector degrees of freedom (-meson) More consistent treatment of ground state (RTF)
DPG, 11.03.08
Ground state in BUU: Stability…Ground state in BUU: Stability…Ground state in BUU: Stability…Ground state in BUU: Stability…
Important in calculating EImportant in calculating Eexcexc
Energy must be conserved!
Important in calculating EImportant in calculating Eexcexc
Energy must be conserved!
Important in determing the Important in determing the sourcesource
No spurious particle emission!
Important in determing the Important in determing the sourcesource
No spurious particle emission!
Improved model for ground state simulations in BUU
B. Steimüller, O. Buss, U. Mosel, poster session, HK34.87
Improved model for ground state simulations in BUU
B. Steimüller, O. Buss, U. Mosel, poster session, HK34.87
DPG, 11.03.08
Dynamical aspects in Dynamical aspects in p+Xp+X reactions… reactions…Dynamical aspects in Dynamical aspects in p+Xp+X reactions… reactions…
Definition of residual nucleus: <sat/100.Definition of residual nucleus: <sat/100.