Task 11.4: Spallation and

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Task 11.4 Spallation and fragmentation reactions
David Pérez Loureiro Universidad de Santiago de
Compostela, Spain
Eurisol DS, Task 11 meeting,Helsinki September07
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Milestones

• Provide data and benchmarking of models for the
  reactions
• 1 A GeV 238U p, d - evaporation residues,
  fission fragments
• (GSI, USC month 12) Done
• 1 A GeV 238U Pb fission fragments (especially
  low-energy fission)
• (GSI, USC month 12) Done
• 1 A GeV 136Xe p, Be, Pb - neutron-rich nuclides
  (cold fragmentation)
• (GSI, USC month 18) Done
• 1 A GeV 238U,208Pb Be - neutron-rich nuclides
  (cold fragmentation)
• (USC month 18) Almost finished
• Systematic calculations of nuclide production
  cross-sections
• (GSI, USC, VINCA) In progress

Eurisol DS, Task 11 meeting,Helsinki September07
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Completed work during the first 33 months

• The full residue production for the reaction
  238U(1 A GeV)1H,2H,Pb

E. Casarejos et al. PRC 74, 044612 (2006)
J. Pereira et al. PRC 75, 014602 (2007)
Eurisol DS, Task 11 meeting,Helsinki September07
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Completed work during the first 33 months

• The predictive power of the ABLA evaporation
  codes is being improved
• - IMF emission 238U(1 A GeV)1H
• - fission model 238U(1 A GeV)Pb
• - collective excitations and dynamics of
  fission 238U(1 A GeV)2H

238U(1 AGeV)2H
238U(1 A GeV)1H
M.V. Ricciardi et al. PRC 73 (2006) 014607
J. Benlliure et al. PRC 74, 014609 (2006)
Eurisol DS, Task 11 meeting,Helsinki September07
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Completed work during the first 33 months

• Production of neutron-rich nuclei in reactions
  induced by 136Xe

Eurisol DS, Task 11 meeting,Helsinki September07
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Completed work during the first 33 months

• Production of medium-mass neutron-rich nuclei in
  136Xe(1 AGeV)Be

124Pd
Eurisol DS, Task 11 meeting,Helsinki September07
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Completed work during the first 33 months

• Role of the projectile energy in the
  fragmentation cross sections

136Xe(1000 A MeV)Ti
136Xe(500 A MeV)Ti
136Xe(200 A MeV)Ti
Eurisol DS, Task 11 meeting,Helsinki September07
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Completed work during the first 33 months

• Production of neutron-rich nuclei in reactions
  induced by 208Pb

208Pb(1 A GeV)Be
Analysis of 238UBe data in progress
Eurisol DS, Task 11 meeting,Helsinki September07
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Planned work

• Finalized the analysis on the production of
  extremely neutron-rich residues in the reaction
  238U(1 A GeV) Be

• Publication of the measured data
• ? 136Xe(1 A GeV) Be (production of
  medium-mass neutron-rich nuclei)
• ? 136Xe(1000, 500, 200 A MeV) Ti (energy
  dependence of the
• fragmentation cross sections)
• ? 208Pb(1 A GeV) Be (production of heavy
  neutron-rich nuclei)

• Systematic calculations of nuclide production
  cross sections
• ? better definition of this task

Eurisol DS, Task 11 meeting,Helsinki September07