Nuclear Data Sheets for A = 106

Intruder deformed bands in 110Sn and 112Sn

Gamma-ray spectroscopy of 110Cd

Even-A Pd nuclei were studied using the reactions /sup 92/,/sup 94/,/sup 96/Zr(/sup 13/C,3ngamma)/sup 102/,/sup 104/,/sup 106/Pd The experiments included gamma-ray yield as a function of energy, gamma-ray angular distributions, gamma-ray linear polarizations, and gamma-gamma coincidence measurements A new treatment of gamma-gamma directional correlation from oriented nuclei, which combines data from all appropriate coincidence pairs to reduce uncertainties, has aided in determining multipolarities for 49 contaminated transitions Extensive decay schemes are presented which include many high-angular-momentum, positive- and negative-parity states In addition to the ground-state band, there appear to be three collective bands built on excited two-quasiparticle states The measurements favor a slightly deformed rotor description of these nuclei over an interpretation in terms of a vibrational (interacting boson) model (AIP)

Collective and two-quasiparticle excitations in /sup 102/,/sup 104/,/sup 106/Pd following (/sup 13/C,3n. gamma. ) reactions

Levels in $^{105,107}\mathrm{Ag}$ have been studied using heavy-ion reactions. The experiments included $\ensuremath{\gamma}$-ray yields as a function of bombarding energy, $\ensuremath{\gamma}$-ray angular distributions, and three-detector $\ensuremath{\gamma}\ensuremath{-}\ensuremath{\gamma}$ coincidence measurements. The positive-parity band based on the unique-parity ${g}_{\frac{9}{2}}$ orbital in both nuclei exhibits a $\ensuremath{\Delta}I=1$ character, unlike its counterpart ${h}_{\frac{11}{2}}$ band in Pd nuclei. The energy levels, $\ensuremath{\gamma}$-ray mixing ratios, branching ratios, and lifetimes in this band as well as in the ground-state negative-parity band are shown to be in good agreement with calculations using a particle-plus-rotor model at a small, symmetric deformation ($\ensuremath{\delta}=0.12$). The Coriolis and recoil effects are explicitly included and a variable moment of inertia is used. The low-lying "anomalous" $\frac{7}{{2}^{+}}$ state is also readily reproduced by this model. The calculation also shows that the $\ensuremath{\Delta}I=1$ nature of the positive-parity band results primarily from the fact that the Fermi surface is far from the $K=\frac{1}{2}$ state, whereas the transition properties are governed by the Coriolis mixing of the strong-coupled bands. Two bands built on the $\frac{17}{{2}^{\ensuremath{-}}}$ and $\frac{21}{{2}^{+}}$ states with high bandhead energies are thought to have three-quasiparticle configurations.NUCLEAR STRUCTURE $^{92}\mathrm{Zr}$($^{16}\mathrm{O}$,$p2n$)$^{105}\mathrm{Ag}$ at 60 MeV, $^{96}\mathrm{Zr}$($^{14}\mathrm{N}$, $3n$)$^{107}\mathrm{Ag}$ at 49 MeV: measured ${I}_{\ensuremath{\gamma}}(E(^{16}\mathrm{O}))$, ${I}_{\ensuremath{\gamma}}(E(^{14}\mathrm{N}))$, ${I}_{\ensuremath{\gamma}}(\ensuremath{\theta})$, $\ensuremath{\gamma}\ensuremath{-}\ensuremath{\gamma}$ coin $\ensuremath{\gamma}\ensuremath{-}\ensuremath{\gamma}$ DCOQ. $^{105,107}\mathrm{Ag}$ deduced levels, $J$, $\ensuremath{\pi}$, $\ensuremath{\gamma}$ mixing ratios. Rotational model calculations, Coriolis, calculated levels, mixing ratios, branching ratios, lifetimes. Ge(Li) detectors.

States in Ag-105, Ag-107 populated by heavy-ion reactions and interpreted by a quasiparticle-plus-rotor model

Levels in /sup 106/Ag have been studied using heavy-ion reactions. The experiments included ..gamma..-ray yields as a function of bombarding energy, ..gamma..-ray angular distributions, ..gamma..-ray linear polarizations, and three-detector ..gamma..-..gamma.. coincidence measurements. The decay scheme includes four collective bands with low-lying bandheads. The energies, ..gamma..-ray mixing ratios, and branching ratios of states in these bands are shown to be in good agreement with the corresponding quantities calculated using a two-particles-plus-rotor model at a small, symmetric deformation (delta=0.12). The Coriolis and recoil effects are explicitly included and a variable moment of inertia is used. The calculation also shows that the four bands have predominant configurations ..nu..(d/sub 5/2/)x..pi..(g/sub 9/2/), ..nu..(g/sub 7/2/)x..pi..(g/sub 9/2/), ..nu..(h/sub 11/2/)x..pi..(p/sub 1/2/), and ..nu..(h/sub 11/2/)x..pi..(g/sub 9/2/), respectively. The ..delta..I=1 and ..delta..I=2 level sequences in the bands can be understood on the basis of the positions of the neutron and proton Fermi surfaces in the respective Nilsson bases. Another band observed experimentally on a 10/sup -/ bandhead at 2.4416 MeV is thought to have a four-quasiparticle structure.

High-angular-momentum states in Ag-106 and their rotational interpretation

Levels of 108Cd populated in the 96Zr(16O, 4nγ)108Cd reaction

The linear polarization of ..gamma.. rays from the deexcitation of Cd isotopes A = 105 through 109 following (/sup 16/O,xn) reactions were measured using a Ge(Li) Compton polarimeter. The linear polarizations are used with ..gamma..-ray angular distributions to make unique-parity assignments and to remove ambiguity in angular-momentum values. With these measurements it is possible to identify many states in /sup 105hyphen109/Cd which are similar to states in Pd nuclei that have been interpreted as having one, two, or three quasiparticles coupled to a slightly deformed rotating core.

Parity determinations in /sup 105hyphen109/Cd from linearly polarized gamma rays following (/sup 16/O,xn) reactions

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