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Giant resonances in unstable oxygen isotopes
- Source :
- Nuclear Physics A. 649:297-304
- Publication Year :
- 1999
- Publisher :
- Elsevier BV, 1999.
-
Abstract
- Electromagnetic and nuclear breakup of the neutron-rich Oxygen isotopes ranging from A = 17 to A = 22 is studied experimentally in reactions at energies around 600 MeV/u. The beams were produced in fragmentation reactions and separated by the GSI Fragment Separator FRS. By measuring the four-momenta of all decay products after inelastic scattering and neutron decay of the projectile, the excitation energy is determined. From the differential cross sections dσ dE ∗ for electromagnetic excitation, the E1-strength distributions can be deduced. For 18,20,22O, low-lying dipole strength is observed, exhausting about 5% of the Thomas Reiche Kuhn sumrule for energies up to 5 MeV above the continuum threshold.
Details
- ISSN :
- 03759474
- Volume :
- 649
- Database :
- OpenAIRE
- Journal :
- Nuclear Physics A
- Accession number :
- edsair.doi...........cc00a85f2dab164fd9fb2cce4ed6cdb3