NeuLAND - FAIR

In the following section we discuss the NeuLAND performance along some of the physics
examples, as laid out in chapter 2. However, to summarize the overall relative energy
resolution σ(Erel), we display in figure 4.17 σ(Erel) as a function of Erel, exemplarily for
132 Sn decaying into 131 Sn and one neutron at beam energies of 600 AMeV, derived from
phase-space simulations.
Figure 4.17.: The relative energy resolution σ(Erel) for Erel values from 100 to 3000 keV
is shown for 132 Sn decaying into 131 Sn and one neutron at beam energies of
600 AMeV. The values, derived from phase-space simulations, are displayed
for distances between the detector and the target of 15.5 m (squares) and
35 m (circles). The resolution is proportional to the square-root of Erel,
the curves present fit functions with a proportionality to √ Erel.
4.5.4. Physics Cases
Evolution of the Collective Response of Exotic Nuclei
For the investigation of heavy exotic nuclei with respect to their collective response, we
discuss, exemplarily, the case of 136 Sn, excited in inverse kinematics via the Coulomb
interaction. The input distribution of dipole strength takes into account a giant dipole
resonance (GDR) and additional strength at lower energy, resembling the pygmy dipole
resonance (PDR). For the GDR, a peak energy of Em = 15.5 MeV and a resonance
width of Γ = 4 MeV were adopted as resonance parameters from systematics. The
GDR exhausts 100% Thomas-Reiche-Kuhn (TRK) sum rule strength. For the PDR,
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