Photo response of Dy164
| العنوان: | Photo response of Dy164 |
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| المؤلفون: | Erin E. Peters, Krishichayan, Werner Tornow, J. R. Vanhoy, T. Beck, J. Kleemann, B. P. Crider, Francisco M. Prados-Estévez, F. Naqvi, B. Löher, Deniz Savran, Megha Bhike, O. Papst, R. S. Ilieva, C. Bernards, V. Werner, T.J. Ross, Johann Isaak, Norbert Pietralla, N. Cooper, U. Friman-Gayer |
| المصدر: | Physical Review C. 102 |
| بيانات النشر: | American Physical Society (APS), 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Physics, education.field_of_study, Dipole, Linear polarization, Excited state, Population, Absorption cross section, Nuclear resonance fluorescence, Atomic physics, Nuclear Experiment, Ground state, education, Excitation |
| الوصف: | Background: Little data is available for the pygmy dipole resonance (PDR) in axially deformed nuclei. Photon-scattering experiments are complicated by high level densities in the PDR region and the small energy difference of transitions to the ground state and to excited states.Purpose: We report on an experimental study of the low-energy dipole strength distribution of the well-deformed nucleus $^{164}\mathrm{Dy}$ between 4.0--7.7 MeV.Methods: The low-lying photoresponse of $^{164}\mathrm{Dy}$ has been investigated using the method of nuclear resonance fluorescence using a quasimonochromatic linearly polarized $\ensuremath{\gamma}$-ray beam in the energy range of 4.0--7.7 MeV in steps of 0.2 MeV.Results: For excitation energies between 4 MeV and 5 MeV, sufficiently low level densities allow for the identification of individual states, including level energies, reduced transition widths and branching ratios. Energy-averaged mean decay branching ratios, mean population ratios and partial absorption cross sections were determined above 5 MeV up to the neutron-separation threshold at 7.7 MeV. A Lorentzian-shaped enhancement of the partial photo absorption cross section followed by decays back to the ground-state band is found at 6.10(5) MeV with a width of 0.77(23) MeV. A comparison with results from complementary measurements is performed using the framework of the statistical model.Conclusions: The experimental results for the mean population ratios deviate systematically from the statistical model simulation by 30(6)%. However, they are in agreement within one standard deviation of the simulation. |
| تدمد: | 2469-9993 2469-9985 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::8fa2787e32e36483ccfc47523670b223 https://doi.org/10.1103/physrevc.102.034323 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi...........8fa2787e32e36483ccfc47523670b223 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 24699993 24699985 |
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