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Dipole strength in La-139 below the neutron-separation energy

dc.contributor.author Makinaga, A
dc.contributor.author Schwengner, R
dc.contributor.author Rusev, G
dc.contributor.author Dönau, F
dc.contributor.author Frauendorf, S
dc.contributor.author Bemmerer, D
dc.contributor.author Beyer, R
dc.contributor.author Crespo, P
dc.contributor.author Erhard, M
dc.contributor.author Junghans, AR
dc.contributor.author Klug, J
dc.contributor.author Kosev, K
dc.contributor.author Nair, C
dc.contributor.author Schilling, KD
dc.contributor.author Wagner, A
dc.date.accessioned 2011-06-21T17:27:46Z
dc.date.available 2011-06-21T17:27:46Z
dc.date.issued 2010
dc.identifier.citation Makinaga,A.;Schwengner,R.;Rusev,G.;Doenau,F.;Frauendorf,S.;Bemmerer,D.;Beyer,R.;Crespo,P.;Erhard,M.;Junghans,A. R.;Klug,J.;Kosev,K.;Nair,C.;Schilling,K. D.;Wagner,A.. 2010. Dipole strength in La-139 below the neutron-separation energy. Physical Review C 82(2): 24314-24314.
dc.identifier.issn 0556-2813
dc.identifier.uri https://hdl.handle.net/10161/4263
dc.description.abstract The gamma-ray strength function is an important input quantity for the determination of the photoreaction rate and the neutron capture rate for astrophysics as well as for nuclear technologies. To test model predictions, the photoabsorption cross section of La-139 up to the neutron-separation energy was measured using bremsstrahlung produced at the electron accelerator ELBE of Forschungszentrum Dresden-Rossendorf with an electron beam of 11.5 MeV kinetic energy. The experimental data were analyzed by applying Monte Carlo simulations of gamma-ray cascades to obtain the intensities of the ground-state transitions and their branching ratios. We found a significant enhancement of electric dipole strength in the energy range from 6 to 10 MeV that may be related with a pygmy dipole resonance. The present data are combined with photoneutron cross sections for La-139 and compared with results of calculations on the basis of a quasiparticle-random-phase approximation using an instantaneous-shape sampling.
dc.language.iso en_US
dc.publisher American Physical Society (APS)
dc.relation.isversionof 10.1103/PhysRevC.82.024314
dc.subject bremsstrahlung cross-section
dc.subject n=82 nuclei
dc.subject process nucleosynthesis
dc.subject photon-scattering
dc.subject fluctuations
dc.subject simulation
dc.subject physics, nuclear
dc.title Dipole strength in La-139 below the neutron-separation energy
dc.title.alternative
dc.type Other article
dc.description.version Version of Record
duke.date.pubdate 2010-8-16
duke.description.issue 2
duke.description.volume 82
dc.relation.journal Physical Review C
pubs.begin-page 24314


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