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Simulations of the AGATA Response to Relativistic Heavy Ions Beams

Simulations of the AGATA Response to Relativistic Heavy Ions Beams. Pavel Detistov University of Sofia “St Kliment Ohridski”. The Problem. Passage of charged ions through matter involves interaction with material’s atomic shells. σ atomic interactions ~ 10000 times σ nuclear.

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Simulations of the AGATA Response to Relativistic Heavy Ions Beams

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  1. Simulations of the AGATA Response to RelativisticHeavy Ions Beams Pavel Detistov University of Sofia “St Kliment Ohridski”

  2. The Problem Passage of charged ions through matter involves interaction with material’s atomic shells. σatomic interactions~ 10000 timesσnuclear • Radiative Electron Capture (REC) – K and L shells are considered • Primary Bremsstrahlung • Secondary Bremsstrahlung The main processes are defined as:

  3. Solution Simulation model is based on GEANT4 toolkit Creation of new process classes in order to represent different processes: • G4ionRadioactiveElectronCaptureK (& L) • G4ionPrimaryBremsstrahlung • SecondaryBremsstrahlung

  4. WHAT IS AGATA? Advanced GAmma-ray Tracking Array High efficiency 4π detector array 180 detectors grouped in 60 equal triple clusters

  5. RISING @ GSI • Array of ex-EUROBALL cluster detectors • Three campaigns: • Fast Beam Campaign • Stopped Beam Campaign • gRising Campaign

  6. 202Pt (7-) (7-) 535 keV 535 keV 280 μs 280 μs ( 4+) ( 4+) 719 keV 719 keV ( 2+) ( 2+) 535 keV 535 keV 0+ 0+ Stopped beam campaign Rising Stopped beam Agata Stopped beam 202Pt

  7. Rising for 202Pt

  8. Fast Beam campaign Rising Fast Beam Campaign Agata Fast beam configuration 1 Agata Fast beam configuration 2

  9. Spectra for 37Ca experiment 37Ca @ 9Be with 195.7 AMeV 700 mg/cm2 Be Target 36Ca: 21+ → 0g.s.+ with E = 3015 keV Data are taken from P.Doornenbal’s thesis @ GSI

  10. Conclusions • AGATA benefits from its higher efficiency compared to RISING array • Due to the high multiplicity (~103)of the background tracking algorithms should be able to deal with that!

  11. Thank you for your attention!

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