Abstract
The dipole strength of the nucleus Kr was studied in photon-scattering experiments using bremsstrahlung produced with electron beams of energies of 7.9 and 11.2 MeV delivered by the linear accelerator ELBE as well as using quasimonoenergetic and linearly polarized rays of 10 energies within the range from 4.7 to 9.3 MeV delivered by the HIS facility. A high-pressure gas target was used. We identified 39 levels up to an excitation energy of 10.1 MeV. Simulations of -ray cascades were performed to estimate intensities of inelastic transitions and to correct the intensities of the ground-state transitions for their branching ratios. The photoabsorption cross section derived in this way up to the neutron-separation energy is combined with the photoabsorption cross section obtained from a experiment at HIS. The enhanced strength found in the range from 6 to 10 MeV is compared with the ones in the 50 isotones Sr, Zr, and Mo and with predictions of calculations within the quasiparticle-phonon model.
6 More- Received 26 November 2012
DOI:https://doi.org/10.1103/PhysRevC.87.024306
©2013 American Physical Society