Nuclear Levels inDy163

Abstract

Nuclear levels of ${\mathrm{Dy}}^{163}$ have been investigated, combining the following experimental techniques: the measurement of low-energy ($n, \gamma$) radiation between 30 keV and ≈1.2 MeV using a curved-crystal spectrometer, the measurement of ($n, e^{-}$) conversion electrons in the energy range between 113 and 950 keV with a double-focusing $\beta$ spectrometer, the investigation of high-energy ($n, \gamma$) transitions between 4 and 6.4 MeV using a Ge(Li) spectrometer, and the study of ($d, p$) and ($d, t$) reactions utilizing 12-MeV deutrons and a broad range magnetic spectrograph. The observed levels are: the [523↓] ground-state rotational band, including the rotational states ${\frac{7}{2}}^{-}$, ${\frac{9}{2}}^{-}$, and $\frac{11}{2^{-}}$; the first 4 members of the [642↑] band, with the ${\frac{5}{2}}^{+}$ band head at 250.9 keV; the [521↓] band, including the members ${\mathrm{½}}^{-}$ (at 351.1 keV), ${\frac{3}{2}}^{-}$, ${\frac{5}{2}}^{-}$, and ${\frac{7}{2}}^{-}$; the lowest 4 members of the [521↑] band, with the ${\frac{3}{2}}^{-}$ state at 421.8 keV; the ${\mathrm{½}}^{+}$, ${\frac{3}{2}}^{+}$, and ${\frac{5}{2}}^{+}$ levels of a $K^{\pi }={\frac{1}{2}}^{+}$ band based at 737.6 keV, believed to be mainly a mixture of the vibrational configuration {[642↑], $K-2\mathrm{}$} and [660]; another $K^{\pi }={\frac{1}{2}}^{+}$ band based at 884.3 keV, including the ${\mathrm{½}}^{+}$, ${\frac{3}{2}}^{+}$, and ${\frac{5}{2}}^{+}$ states, assigned as mainly a three-quasiparticle configuration; a state at 820.8 keV, assigned as the head of a $K^{\pi }={\frac{3}{2}}^{-}$ band, probably of vibrational character; a state at 859.3 keV, assigned as the head of a

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This publication has 29 references indexed in Scilit:

• Der Zerfall von 162Tb und 163Tb
  Nuclear Physics, 1966
• Energieniveaus und Gammaübergänge in Dy 164
  The European Physical Journal A, 1964
• Gammaübergänge und Energieniveaus in Dy 165
  The European Physical Journal A, 1964
• Radioactive capture cross section of dysprosium isotopes in the 0.023?1 eV energy interval
  Atomic Energy, 1964
• A magnetic spectrometer for neutron capture experiments
  Nuclear Instruments and Methods, 1962
• Spin-Orbit Splitting in Deformed Nuclei
  Journal of the Physics Society Japan, 1962
• Internal Conversion Electrons Following Coulomb Excitation of Highly Deformed Odd-ANuclei
  Physical Review B, 1960
• Precision Determination of Nuclear Energy Levels in Heavy Elements
  Physical Review B, 1958
• Inelastic Scattering of 4-Mev Protons and Deuterons from Separated Isotopes ofDy161,Dy163,Yb171, andYb173
  Physical Review B, 1957
• Coulomb Excitation of Rotational Levels in Dysprosium
  Physical Review B, 1957

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