Electromagnetic dipole strength up to the neutron separation energy from 196Pt(γ,γ) and 195Pt(n,γ) reactions

R. Massarczyk, G. Schramm, A. R. Junghans, R. Schwengner, M. Anders, T. Belgya, R. Beyer, E. Birgersson, A. Ferrari, E. Grosse, R. Hannaske, Z. Kis, T. Kögler, K. Kosev, M. Marta, L. Szentmiklósi, A. Wagner, J. L. Weil

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Abstract

The dipole strength in the nucleus 196Pt was investigated using two different experimental methods. The photon spectrum from the deexcitation of a state after cold neutron capture in 195Pt is influenced by the dipole strength and nuclear level density in 196Pt as is the γ-ray spectrum from photon scattering on 196Pt. In a combined analysis of data from the research reactor in Budapest and the bremsstrahlung facility at the ELBE accelerator in Dresden, the geant4 code was used to calculate detector response and efficiency. Also the influence of non-nuclear scattered photons was determined and allows us to take into account the continuum of unresolved states. The statistical code γdex was used to estimate branching ratios and compare simulated and experimental spectra. Using information from both experiments it was possible to obtain a temperature parameter of 600 keV for the constant temperature level density model. For the dipole strength a small extra strength over the tail of the giant dipole resonance in the region below the neutron separation energy was found.

Original languageEnglish
Article number044306
JournalPhysical Review C - Nuclear Physics
Volume87
Issue number4
DOIs
Publication statusPublished - Apr 5 2013

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ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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Massarczyk, R., Schramm, G., Junghans, A. R., Schwengner, R., Anders, M., Belgya, T., Beyer, R., Birgersson, E., Ferrari, A., Grosse, E., Hannaske, R., Kis, Z., Kögler, T., Kosev, K., Marta, M., Szentmiklósi, L., Wagner, A., & Weil, J. L. (2013). Electromagnetic dipole strength up to the neutron separation energy from 196Pt(γ,γ) and 195Pt(n,γ) reactions. Physical Review C - Nuclear Physics, 87(4), [044306]. https://doi.org/10.1103/PhysRevC.87.044306