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EURISOL DS Task 11.2

EURISOL DS Task 11.2. Universidad de Santiago de Compostela, Spain. Eurisol DS: task 11 meeting March‘05. Subtask description. Preparation of an experiment to investigate residual nuclei production in the reaction 132 Sn+Be at different energies and data taking of the experiment.

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EURISOL DS Task 11.2

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  1. EURISOL DS Task 11.2 Universidad de Santiago de Compostela, Spain Eurisol DS: task 11 meeting March‘05

  2. Subtask description • Preparation of an experiment to investigate residual nuclei production in the reaction 132Sn+Be at different energies and data taking of the experiment • Analyze data, provide production cross sections and validate and improve model calculations on fragmentation of neutron-rich projectiles Eurisol DS: task 11 meeting March‘05

  3. Implementation plan for the first twelve months • Preparation of the experiment proposal and submission to the GSI PAC. • Construction of specific detectors required for this experiment new readout for ADCs to increase the acquisition rate • Detailed planification of the experiment • Beam time preparation: detector setup and DAQ • Data taking with 136Xe and 238U beams Eurisol DS: task 11 meeting March‘05

  4. Reminder of the experiment • Production of extremely neutron-rich isotopes (two-step schemes: fission + cold fragmentation) n,p + 238U  132Sn + Be  X • Ground state properties of extremely neutron-rich isotopes • Total interaction cross sections: rms matter distributions • Proton knock-out: rms charge distributions, binding energies • Proton and neutron pickup: charge versus mass distribution Eurisol DS: task 11 meeting March‘05

  5. Experimental details S0-S2:238U(950 A MeV)+Pb  124-132Sn DZ/Z ~ 5 10-3 DBr/r ~ 3 10-4 DToF ~ 150 ps L ~ 18 m DA/A ~ 4.5 10-3 S2-S4:124-132Sn + Be  X DZ/Z ~ 7 10-3 DBr/r ~ 3 10-4 DToF ~ 150 ps L ~ 36 m DA/A ~ 2.4 10-3 Eurisol DS: task 11 meeting March‘05

  6. Experimental details 238U(1 A GeV)+d  1XXSn 5 different settings centered on: 124Sn, 126Sn, 128Sn, 130Sn, 132Sn Eurisol DS: task 11 meeting March‘05

  7. Beam time request Total requested time: main beam time (238U)  7 days (21 shifts) parasitic beam (136Xe)  5 days Eurisol DS: task 11 meeting March‘05

  8. Present status of the work • The experiment proposal was submitted and approved by the GSI PAC (18 shifts 136Xe-parasitic and 18 shifts 238U ) • A new plastic scintillator detector is being built at GSI to be used as ToF start at S1 • There are two options for the tracking at S2 (GEM or TPCs). We should decide on one of those • Somebody should work on the new readout of ADCs • We propose a special meeting to coordinate the preparations (participants outside EURISOL: CENBG, Finland) • We will try to get the beam in the first block of 2006 Eurisol DS: task 11 meeting March‘05

  9. Resources distribution EU contract resources: • 2005: 6 man-month (student): 12 K€ + meetings 2 K€ • 2006: 12 man-month (student): 24 K€ + meetings 2 K€ • 2007: 12 man-month (student): 24 K€ + meetings 2 K€ • 2008: 6 man-month (student): 12 K€ + meetings 2 K€ Other resources: • 2005: traveling (preparation of beam time): 6 K€ • 2006: traveling (beam time): 8 K€ • 2007-2008: traveling (data evaluation): 6 K€ Eurisol DS: task 11 meeting March‘05

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