6533b82dfe1ef96bd129088c
RESEARCH PRODUCT
Giant resonances in unstable oxygen isotopes
P. ReiterThomas AumannD. CortinaJ. V. KratzK. SümmererTh. W. ElzeJoachim StrothHans GeisselK. BoretzkyM. RejmundW. WalusNaohito IwasaE. WajdaE. LubkiewiczJ. CubB. EberleinC. SchlegelS. WanHerbert A. SimonR. KulessaA. GrünschloßH. EmlingS. IlievskiY. LeifelsW. DostalC. ScheidenbergerM. KasparR. HolzmannJ. HoleczekA. LeistenschneiderA. KleinböhlMargareta HellströmG. Münzenbergsubject
PhysicsNuclear reactionNuclear and High Energy PhysicsScatteringNuclear TheoryInelastic scatteringIsotopes of oxygenNuclear physicsDipoleGiant resonanceNeutronAtomic physicsNuclear ExperimentExcitationdescription
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1999-03-01 | Nuclear Physics A |