In-beam γ-ray studies of complex band structures and of isomeric states in 152, 153Dy nuclei |
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Authors: | JFW Jansen MJA de Voigt Z Sujkowski D Chmielewska |
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Institution: | Kernfysisch Versneller Instituut, Groningen, The Netherlands;Institute for Nuclear Research (IBJ), 05-400 Swierk, Poland |
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Abstract: | The high-spin level structures of 152Dy and 153Dy were studied experimentally with 154, 155Gd(α xnγ) in-beam reactions, and for 152Dy also with reactions. The experiments included measurements of singles γ-ray and conversion-electron spectra, γ-ray angular distributions and Eγ-t and Eγ-Eγ-t coincidences. A multiplicity filter set-up was used to study the feeding and decay of isomeric states in 152Dy. In 152Dy about twenty so far unknown levels were found, including two high-spin isomeric states with at excitation energies Ex ≈ 5.04 and 6.08 MeV, respectively. These states are compared with recent calculations on yrast traps. The level scheme of 153Dy contains 28 levels up to Ex = 4.1 MeV and . Band structures in both nuclei are discussed in comparison with other N = 86 and N = 87 isotones. |
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Keywords: | Nuclear reactions |
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