Dipole strength in Xe-Isotopes

Dipole strength in Xe-Isotopes

Massarczyk, R.; Schwengner, R.; Dönau, F.; Anders, M.; Bemmerer, D.; Beyer, R.; Bhatia, C.; Birgersson, E.; Butterling, M.; Elekes, Z.; Ferrari, A.; Hannaske, R.; Junghans, A. R.; Kempe, M.; Kelley, J. H.; Kögler, T.; Matic, A.; Menzel, M. L.; Müller, S.; Reinhardt, T.; Röder, M.; Rusev, G.; Schilling, K. D.; Schmidt, K.; Schramm, G.; Tonchev, A. P.; Tornow, W.; Wagner, A.

Nuclear resonance fluorescence experiments have been performed at the bremsstrahlung facility of the ELBE accelerator in Dresden-Rossendorf. The electromagnetic dipole strength below the neutron separation energy of several nuclei in the chain of Xenon isotopes has been investigated.
The measurements in chain of gaseous isotopes allowed a comparison of the summed strength not only as a function of the neutron-to-proton ratio but also of the nuclear quadrupole deformation.
Experiments and calculations using a quasiparticle random-phase approximation have been used in the chain of Xenon isotopes to estimate the importance nuclear deformation in the energy region on the pygmy strength.

Keywords: nuclear resonance flourescence; nuclear structure; pygmy strength; photo absorption; nuclear deformation

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