1. xy position from LYCCA Slowed down beams - new perspective for GOSIA scattering experiments at relativistic energies

2. abrasion projectile target nucleus ablation projectile fragment SIS UNILAC FRS Production, Separation, Identification TPC-x,y position @ S2,S4 Plastic scintillator (TOF) @ S4 MUSIC (ΔE) @ S4 Standard FRS detectors FRagment Separator

3. Scattering experiments at 100 AMeV 56 Cr, 100MeV/u 56 Cr Z A/Q 86 Kr, 480MeV/u standard scintillator (SC21)finger segmented detector 104 Sn fragments using 124 Xe at 793 MeV/u high rate at S2 ~10 6 s -1  ~2400 % more tracking efficiency  good A/Q resolving power Frederic Ameil new digital readout

4. 56 Cr, 100MeV/u relativistic Coulomb excitation 86 Kr, 480MeV/u 197 Au-target exp. observables: Z, A, θ RIB from FRS secondary 197 Au target DSSSD CsI time-of-flight (x,y,ΔE) diamond/plastic Lund-York-Cologne CAlorimeter Scattering experiments at 100 AMeV

5. Rare ISotope INvestigation at GSI EUROBALL Cluster Detectors Miniball: HPGe segmented detectors HECTOR Large 14.5 x 17 cm BaF 2 Detectors CATE : ΔE-E telescope event by event beam identification Coulomb Excitation at Relativistic Energy New Shell structure at N>>Z Relativistic Coulomb excitation of nuclei near 100 Sn Triaxiality in even-even core nuclei of N=75 isotones E1 Collectivity in neutron rich nuclei 68 Ni beam nucleusσ (mb) 56 Cr91 108 Sn314 136 Nd338 / 2180 ε γ = 3% ΔE γ = 20 keV

6. EUROBALL Cluster Detectors Miniball: HPGe segmented detectors HECTOR Large 14.5 x 17 cm BaF 2 Detectors CATE : ΔE-E telescope event by event beam identification beam Rare ISotope INvestigation at GSI ε γ = 3% ΔE γ = 20 keV VCVC angular momentum transfer:  2 + state → collective strength

7. High-energy Coulomb excitation triaxiality in even-even nuclei (N=76) 2 1 + →0 + 2 2 + →2 1 + 2 2 + →0 + 2 2 + →2 1 + 2 2 + →0 + First observation of a second excited 2 + state populated in a Coulomb experiment at 100 AMeV using EUROBALL and MINIBALL Ge-detectors.  shape symmetry  collective strength T.R. Saito et al. Phys.Lett. B669 (2008), 19

8. Slowed down beams experimental set-up 64 Ni 700 AMeV 10 9 pps 10 7 pps 3∙10 6 pps 10 5 pps 62 Co ~ 13 AMeV 62 Co 250 AMeV VCVC

9. Slowed down beams beam characteristics 62 Co 250 AMeV 62 Co ~ 13 AMeV ΔEnergy 5.2 AMeV Δθ 35 mrad

10. Slowed down beams beam energy measurement targetdegrader electrostatic mirror + MCP detector position resolution ~ 1 mm time resolution ~ 100 ps TPC-1 TPC-2 SC41 (x 1 y 1 t 1 ) (x 2 y 2 t 2 ) (x 3 y 3 t 3 ) experimental results: velocity β beam energy E/A 1 scattering angle θ cm

11. Time resolution – 150ps Position resolution for alpha particle – 3mm for fission fragments – 1.7mm Slowed down beams MCP detector test at GSI

12. Classical Coulomb trajectories basic concept Hyperbolic trajectory: ε = sin -1 (θ cm /2) eccentricity of orbit  distance of closest approach:  impact parameter:  angular momentum : 100 AMeV

13. Classical Coulomb trajectories distance of closest approach 100 AMeV Nuclear interaction radius: C P, C T half-density radii  distance of closest approach: independent of beam energy

14. ´safe´bombarding energy requirement 100 AMeV Nuclear interaction radius: C P, C T half-density radii Pure Coulomb excitation requires a much larger distance between the nuclei  ”safe energy” requirement

15. ´safe´bombarding energy requirement < 1% deviation from Coulomb excitation D min Rutherford scattering only if D min is large compared to nuclear radii + surfaces: C P, C T half-density radii  choose adequate beam energy (D > D min for all  )  limit scattering angle, i.e. select D > D min high-energy Coulomb excitation 100 AMeV

16. Slowed down beams targetdegrader TPC-1 TPC-2 SC41 (x 1 y 1 t 1 ) (x 2 y 2 t 2 ) (x 3 y 3 t 3 ) ΔEnergy 5.2 AMeV ToF measurement GOSIA calculation: weighted with beam energy

17. Slowed down beams new perspective for GOSIA P. Boutachkov, E.T. Gregor, F. Naqvi, F. Farinon, J. Gerl, M. Gorska, I. Kojouharov, I. Mukha, C. Nociforo, W. Prokopowicz, S. Pietri, A. Prochaka, H. Schaffner, H. Weick, H.J. Wollersheim Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany K. Hadynska, P. Napiorkowski, D. Pietak University of Warsaw, Warsaw, Poland P. Bednarczyk IFJ PAN Krakow, Poland N.A. Kondratyev Flerov Laboratory of Nuclear Reactions JINP, Dubna, Russia A. Jhingan Inter University Accelerator Centre, New Delhi, India R. Janik, P. Strmen, Comenius University, Bratislava, Slovakia M.A.G. Alvarez Centro National de Acceleradores CNA, Seville, Spain