Simulations of the AGATA Response to Relativistic Heavy Ions Beams
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24.06.2009 Simulations of the AGATA Response to Relativistic Heavy Ions Beams Pavel Detistov University of Sofia “St Kliment Ohridski”
description
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. - PowerPoint PPT Presentation
Transcript of Simulations of the AGATA Response to Relativistic Heavy Ions Beams
24.06.2009
Simulations of the AGATA Response to Relativistic
Heavy Ions Beams
Pavel Detistov
University of Sofia “St Kliment Ohridski”
24.06.2009
The Problem
• Radiative Electron Capture (REC) – K and L shells are considered
• Primary Bremsstrahlung• Secondary Bremsstrahlung
Passage of charged ions through matter involves interaction with material’s atomic shells.
σatomic interactions ~ 10000 times σnuclear
The main processes are defined as:
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Solution
Simulation model is based on GEANT4 toolkit
Creation of new process classes in order to represent different processes:
1.G4ionRadioactiveElectronCaptureK (& L)
2.G4ionPrimaryBremsstrahlung
3. SecondaryBremsstrahlung
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WHAT IS AGATA?
Advanced GAmma-ray Tracking Array
High efficiency 4π detector array
180 detectors grouped in 60 equal triple clusters
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RISING @ GSI
• Array of ex-EUROBALL cluster detectors
Three campaigns: Fast Beam Campaign Stopped Beam CampaigngRising Campaign
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Stopped beam campaign
Rising Stopped beam
Agata Stopped beam
535 keV
535 keV
719 keV
(7-)
( 4+)
( 2+)
0+
280 μs
202Pt
535 keV
535 keV
719 keV
(7-)
( 4+)
( 2+)
0+
280 μs
202Pt
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Rising for 202Pt
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Spectra for 202Pt
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En$rgy, k$V
Agata for 202Pt
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Rising vs Agata
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Fast Beam campaign
Rising Fast Beam Campaign
Agata Fast beam configuration 1
Agata Fast beam configuration 2
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Spectra for 37Ca experiment
37Ca @ 9Be with 195.7 AMeV700 mg/cm2 Be Target
36Ca: 21+ → 0g.s.
+
with E = 3015 keV
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Agata configuration 2 spectra for 37Ca with data
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Agata configuration 1 spectra for 37Ca with data
Data are taken from P.Doornenbal’s thesis @ GSI
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Rising spectra for 37Ca with data
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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!
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Thank you for Thank you for your attentionyour attention!!
