Research activities of ATOMKI at former LSF IReS StrasbourgHigh-spin statesJ Timr, ATOMKI, DebrecenPrague 2007

Roots of the ATOMKI high-spin group IReS collaborationPersonal links with labs building EG and EB A Algora, BM Nyak, D Sohler, J Timr, L Zolnai: PhD, postdoc or other positions in Liverpool, Grenoble, Stockholm, and Legnaro for periods from a few months to a few years

Developement of the DIAMANT charged-particle detector array for use with EB J Gl, Gy Hegyesi, K Juhsz, G Kalinka, J Molnr, BM Nyak: Prague 2007CENBG (Bordeaux) ATOMKI (Debrecen) University of Napoli collaboration

Main topics and results of our research activity at IReSOctupole vibration in a SD nucleus (2 experiments, EG +EB) 190HgBand termination at A~100 (1 experiment, EG) 102,103Pd, 100,101,102Rh, 98,99,100Ru, Band termination at A~130 (2 experiments, EB) 132Ce, 128La, 132LaN~Z nuclei at A~100 (5 experiments, EB) 93Pd, 95Ag, 98CdChiral bands at A~100 (1 experiment, EB+DIAM) 105,106Rh, 102RuSearch for hyperdeformation (2 experiments, EB+DIAM) 126Ba,118Te, 124Cs, 125Cs, 124Xe

Prague 2007In collaboration with other EWON and non-EWON labs >50 pulications

Octupole vibration in the SD 190Hg (Eurogam)A Wilson et al., Phys. Rev. C54 (1996) 559RPA calculations predicted octupole vibration in SD bands near 190Hg. Experimental signature: strong E1 transitions between the SD bands.Prague 2007

Octupole vibration in the SD 190Hg (Euroball)First example of SD bands built on collective vibrationA Korichi et al., Phys. Rev. Lett. 86 (2001) 2746Prague 2007

Band termination at A~100Band termination was predicted also for nuclei around100Ru at around spin 30 by CNS calcs.Experiment with Eurogam 2

Reaction: 70Zn + 36S at 130 MeV~ 6x108 triple- and higher-fold eventsNew high-spin bands for severalPd, Rh, and Ru nucleiJ.Gizon et al., Phys. Lett. B410 (1997) 95Prague 2007

Band termination at A~100 resultsFirst observation of band termination in the A~100 mass region

Termination of several bands based on valence-particle and core excited intrinsic configurations in 102,103Pd, 101,102Rh, and 98,99,100Ru

The observed band terminations correspond to a new type: rigid rotation-like band termination

On the basis of the properties of the observed terminating states we proposed a larger value for the energy spacing between the neutron d5/2 and g7/2 orbitalsPrague 2007

Chiral bands in the A~100 mass regionAgRhTcZPrague 2007S. Frauendorf, J. Meng, Nucl. Phys. A 617 (1997) 131.

Chiral bands in the A~100 mass region results with EUROBALL J.Timr et al., Phys. Lett. B598 (2004) 178Experiment: EUROBALL + DIAMANT at Vivitron IreS96Zr(13C,p3n)105Rh fusion-evaporation reactionBeam energies of 51 MeV and 58 MeV~ 2x109 triple- and higher-fold events~ 5x107 belonged to 105Rh

First composite chiral structure in this regionPrague 2007

Search for hyperdeformation around 126Ba (HLHD experiment)Prague 2007K. Pomorski, J. Dudek, Phys. Rev. C67, 044316 (2003).LSD calcs.

Search for hyperdeformation around 126Ba (HLHD experiment)Cuts taken on 3D Rotational Plane: Ex + Ey - 2 Ez = Results from 'xn'-type data RPM analysisPreliminary results from 'particle xn'-type data:Prague 2007B. Herskind et al., Acta Phys. Pol. B 38, 1421 (2007)

The DIAMANT R&D collaborationPrague 2007

The DIAMANT ancillary detectorPrague 2007

EXOGAM experiments using DIAMANT @ GANILExp-#Physics Motivation; Stable-RadioactiveBeam/Target Detectors(Spokesperson) EXOGAM +--------------------------------------------------------------------------------------------------------------------------------E404S/E404aSIdentification of -rays in nuclei around the drip-line nucleus 130Sm: DIAMAMT & (P.Nolan)probing the maximally deformed light rare-earth region DIAMANT76Kr(60MeV)/1.1mg/cm2 58Ni; +VAMOS--------------------------------------------------------------------------------------------------------------------------------E498SHigh Spin States in the Tz=-3/2 Nucleus 37Ca Mirror Symmetry DIAMANT (S.Williams)at the Largest Values of Isospin; 18Ne(60MeV)/1mg/cm2 24Mg; +N-WallE482Mirror Energy Differences in the A=58, T=1 mass triplet and Charge DIAMANT (A.Gadea)Symmetry Breaking terms in the nuclear effective interaction above +N-Wall 56Ni; 36Ar(85MeV)/0.5 mg/cm2 24Mg target on 90Zr backing, 4pnAE505Electromagnetic decay properties of the Tz=1/2, A=67 and 71 DIAMANT (G.deAngelis)mirror pairs: A test for isospin mixing and for pn pairing; +N-WallE514Single-particle energies and proton-shell gap in 100Sn DIAMANT (M.Palacz)extracted from high-spin states in 103Sn; +N-Wall 58Ni(240 MeV) 8 mg/cm2 54Fe target, 1.7 pnAE451Search for T=0 pairing and a new coupling scheme in 92Pd and 88Ru DIAMANT (B.Cederwall)36Ar(111 MeV) 6 mg/cm2 58Ni target, 5 pnA (Submitted to PRC) +N-WallPrague 2007

Future plans with LSF-s in EuropeWe plan to continue high-spin studies at LSF-s in Europe with special emphasis on: SPIRAL 2, EXOGAM (Ganil) GASP, CLARA, AGATA (Legnaro) Diamant needs to be upgraded to fit to the new arrays

It is very much suitable for studying proton drip line nuclei because of its high granularity

Every groups are welcome to performe experiments with it!Prague 2007