1. Rare ISotope INvestigation at GSI Status of the relativistic beam campaign Introduction Fast beam physics program Experimental methods Status and perspectives P. Reiter for the RISING collaboration Workshop: RISING with stopped beams University of Surrey, March 29 – 30, 2004

2. RISING introduction RISING physics with stopped beams, March 29/30, 2004 Surrey GSI Program Advisory Committee January 26/27, 2004 Darmstadt 4 RISING proposals Commissioning & first experiments August-October 2003 GSI Program Advisory Committee June 20/21, 2002 Darmstadt 12 RISING proposals Physics with RISING at GSI, March 22, 2002 Orsay RISING physics with relativistic HI-beams, April 6, 2001 Darmstadt RISING physics with stopped beams, March 9, 2001 Göttingen RISING physics with slowed-down beams, April 2/3, 2001 Legnaro Physics with EUROBALL detectors at GSI, November 23/24, 2000 Darmstadt

3. High resolution  -spectroscopy at the FRS RISING fragmentation and fission of primary beams projectile energy 400 – 750 MeV/u primary targets: Be or Pb Dipoles: Identification of fragmentation product (A,Z)  -spectroscopy at secondary target Channel selection after target (A,Z) Tracking before/after secondary target FRS

4. RISING approved experiments No.Nuclei of Interest Primary Beam SpokespersonsExperiment Type approved (days) 1 32,34 Mg 48 CaP. Mayet 2 step fragmentation lifetime 6 2 45 Cr, 53 Ni, 45 Sc, 53 Mn 58 NiM. Bentley2 step fragmentation 7 3 68 Ni 86 KrA. BraccoCoulex, E1 strength 7 4 36 Ca, 66 Fe 86 Kr H. Grawe, H. Hübel P. Reiter Coulex, 2 + 1 13 5 69 Br 78 Kr F. Becker 2 step fragmentation 7 6 88 Kr, 90 Sr, 86 Se 238 UJ. JolieCoulex, 2 + 2 10 7 104-112 Sn 124 Xe C. Fahlander M. Górska Coulex, 2 + 1 7 8 132 Sn 238 UG. de AngelisKnock-out 5 9 132 Xe 136 XeA. MajCoulex, Angular Distr. 3 10 134 Te 136 XeK.-H. SpeidelCoulex, g-factor 7 11 136 Nd 144 SmT. SaitoCoulex 7 12 185,186,187 Pb 238 U J. Gerl, A. Andreyev G.D. Dracoulis 2 step fragmentation lifetime 8

5. Physics program 66 Fe 53 Ni 32,34 Mg 104-112 Sn 68 Ni 134 Te 132 Sn Shell structure of unstable magic- and double magic nuclei

6. Isospin symmetry at N=Z 50 Fe 50 Mn 50 Cr 46 V 46 Cr 46 Ti 53 Co 49 Fe 45 Cr 53 Fe 55 Ni 55 Co 45 V 45 Ti 43 Ti 43 Sc 41 Ca 41 Sc 53 Ni 45 Sc 42 Ti 42 Sc 42 Ca f 7/2 -shell T= 1/2 T= 1 T=3/2 no excited states 45 Cr, 49 Fe, 53 Ni 69 Br ?

7. Shapes and shape coexistence 2+2+ 3+3+ 185,186,187 Pb 136 Nd potential energy surface for 186 Pb

8.  -decay of the GDR in the Exotic Nucleus 68 Ni Giant Dipole Resonance (GDR) : basic collective excitation modes effective NN interactions Evolution of GDR strength in exotic nuclei : Fine structures GDR strength at lower energy astrophysical implications RISING: relativistic Coulomb excitation (virtual photon scattering)  -decay branch:    tot ~ 10 -3 - 10 -2 Relativistic RPA, Vretenar et al. 68 Ni 78 Ni 58 Ni 48 Ni

9. experimental methods Established methods: Coulomb excitation - first 2 + states => B(E2) - giant dipole resonance (virtual photon absorption) Secondary fragmentation - excited states at higher spins and excitation energy

10. RISING new developments Coulomb excitation - -Low lying states B(E1), B(E2, 0 + gs -> 2 + 1,2,3 ) - -2 + states + angular correlation - -2 + states + g-factor

11.  -decay of the GDR in the Exotic Nucleus 68 Ni Excited via Coulomb Excitation  -decay of the GDR in the Exotic Nucleus 68 Ni reaction 68 Ni (400 MeV/A) + nat Pb (2 g/cm 2 ) BaF 2 for the whole GDR strength function Ge cluster for the Pygmy part HECTOR 6 BaF 2 detectors efficiency at high energies:

12. knock-out reactions Spectroscopic factors:  -ray intensity of excited states in the A-1 fragment. No l-value of ejected nucleon, missing momentum distribution. Recoil momentum  -decay of excited states 132 Sn

13. Shape evolution in n-rich Mg nuclei Primary beam : 48 Ca Secondary beam : 38 Si SISFRS S4 Secondary fragmentation & lifetime measurement targets: Au : 3 x 0.3 g/cm 2 0.7 mm2.1 mm 38 Si 100 MeV/u EE 22 32 Mg,  2 E2E2 11 32 Mg,  1 E1E1 33 32 Mg,  3 E3E3

14. RISING timetable 2003 22.4.- 16.5.2003 Cluster shipment 22.4.- 4.8.2003 annealing, assembly, testing and mounting 16.6.- 20.6.2003 assembly of support structure 14.7.- 5.8.2003 VXI-MBS tests (S4) beam time Commissioning I Commissioning II New Shell Structure at N>>Z Isospin Symmetry, Coulomb Effects Coulomb Excitation Near 100 Sn beam 132 Xe 84 Kr 58 Ni 124 Xe date Aug 06 – Aug 11 Sep 12 – Sep 21 Sep 22 – Sep 28 Oct 11 - Oct 20 Oct 21 - Oct 27

15. short term outlook 2004 Block 2/2004: March 31 - May 21 (Therapy: March 31 - April 30) RISING: May 1 – 18 - E1 strength in 68 Ni RISING & HECTOR - Shell structure in N>>Z nuclei Block 3/2004: July 14 - October 7 (Therapy: July 14 - August 13) Block 4/2004: Oct. 27 – Dec. 16 (Therapy: Oct. 27 – Nov. 26) RISING: Nov. 29 – Dec. 12 RISING & MINIBALL 2005   Winter: RISING & MINIBALL Increased  -efficiency: 4 - 10 % SIS beam time is shared between: HADES FRS & ESR mass measurements RISING RISING & MINIBALL

16. Summary RISING fast beam campaign - - started data taking on time in 2003 First experiments - - Coulomb excitation of stable 84 Kr (commissioning) - - Coulomb excitation of fragments: 56 Cr, 108 Sn, 112 Sn - - Spectroscopy after secondary fragmentation of 55 Ni see talks: N. Hashimoto, M. Gorska, A. Bürger, M. Bentley