1. N. Redon AW Uppsala July 20081 Proposal for a commissioning experiment with the AGATA Demonstrator Proposal for a commissioning experiment with the AGATA Demonstrator 7 th AGATA Week, Uppsala 8-11 July 2008 Q.T. Doan, O. Stézowski, D. Guinet, A. Vancraeyenest, N. Redon IPN Lyon, France An experiment to demonstrate the performance of the tracking - for fusion-evaporation reactions - with high  multiplicity - medium energy  -rays (~1 MeV) An experiment on well known and well populated superdeformed nucleus based on simulations

2. N. Redon AW Uppsala July 20082 population of the SD band in 152 Dy via a nearly mass-symmetric reaction 82 Se + 74 Ge  156 Dy*  152 Dy + 4n v/c ≈ 4.9% SD(2%) ND

3. N. Redon AW Uppsala July 20083 Simulations have been realized to compare the performances of EUROBALL (EB) and the AGATA Demonstrator (AD) (Q.T. Doan presentation, 6 th AGATA Week, November 2007) EB AD

4. N. Redon AW Uppsala July 20084  photopeak efficiency goes from ~9.5% (EB) to ~4-5% (AD at 140mm) for E  ~ 1 MeV and M  = 15-30  reduction of the Doppler broadening

5. N. Redon AW Uppsala July 20085  statistics with fold ≥ 2 with AD at 140mm  -  coincidences

6. N. Redon AW Uppsala July 20086

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9. 9 Energy (keV) Counts

10. N. Redon AW Uppsala July 200810 Energy (keV) Counts

11. N. Redon AW Uppsala July 200811 Conclusions Simulations predict good performances for the AGATA Demonstrator at 140mm : excellent resolution and P/T Even with lower efficiency, AD gated spectra cleaner than EUROBALL ones We propose a fusion-evaporation test experiment : 74 Ge + 82 Se @ 328 MeV (v/c ≈ 4.9%) to observe the Superdeformed Band in 152 Dy and check the performances of the AGATA Demonstrator at high  multiplicity We will need 5 Triple Clusters at 140mm

12. N. Redon AW Uppsala July 200812