Levels of120,122Sb have been observed using the121,123Sb(p, d) reactions atE p = 26.2 MeV. Thirty-two levels of120Sb and thirty-four levels of122Sb are observed below 2.0 MeV excitation with an energy resolution better than 25 keV FWHM. Experimental angular distributions were compared to DWBA calculations in order to extractl-transfers and spectroscopic factors. Strong mixing between the 3s1/2, 2d3/2, 2d5/2, and 1g7/2 neutron orbitals is observed in both nuclei. Nuclear Reactions:121,123Sb(p, d),E=26.2 MeV; measuredσ(E d ,θ).120,122Sb deduced levels,l,J,π, spectroscopic factors. Enriched targets, magnetic spectrometer.

Levels of120Sb have been observed using the120Sn(p, nγ) reaction at proton energies between 3.90 and 6.25 MeV. Sixteen previously unobserved levels below 1.03 MeV were populated. The resulting level scheme is compared with that obtained using the121Sb(p, d) reaction.

The high-spin states in 90Nb have been studied by in-beam γ-ray spectroscopy using the 35 MeV 89Y(α, 3nγ)90Nb and 33 MeV 90Zr(3He, p2nγ)90Nb reactions. A new isomeric state with half-life 0.44±0.02 σs and Jπ = 11− has been located in this nucleus. The level scheme derived from these measurements is compared with shell-model calculations.

Exclusive neutron spectra and angular distributions have been measured by n-γ coincidence techniques for (α, xnγ) and (3He, xnγ) reactions on 150Nd in the 25–44 MeV range. The results show that pre-equilibrium processes dominate low-energy light-ion induced reactions at certain beam energies. Analysis of the yrast γ-ray cascades in the residual nuclei shows that a well-defined minimum entry-state spin exists in final nuclei populated by pre-equilibrium processes. This in turn implies the existence of a minimum classical impact parameter for these reactions. These results are discussed in terms of phenomenological models of the reaction mechanisms.

The level scheme of106Ag has been studied using the103Rh(α,nγ)106Ag and104Pd(α,pnγ)106Ag Reactions. The experimental information is taken fromγ-ray coincidence data using Ge(Li)-Ge(Li) and HPGe-planar Ge(Li) configurations andγ-ray angular distributions. With these measurements 126 γ rays have been assigned to106Ag with 116 deexciting 78 states below 2.26 MeV in excitation. The location of the 8.4-day 6+ isomer is established at 89.63±0.09 keV. Many of the low-lying states are interpreted in terms of a slightly deformed rotor model.

The level structure of87Y has been studied using in-beam γ-ray spectroscopic methods. Many previously unknown states have been observed. Members of theπ(g9/2)ν(g9/2)−2 multiplet are identified. The results are discussed in terms of the weak-coupling model.

The linear polarization of $\ensuremath{\gamma}$ rays from the deexcitation of Cd isotopes $A=105$ through 109 following ($^{16}\mathrm{O},xn$) reactions were measured using a Ge(Li) Compton polarimeter. The linear polarizations are used with $\ensuremath{\gamma}$-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 $^{105\ensuremath{-}109}\mathrm{Cd}$ 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.[NUCLEAR REACTIONS $^{92}\mathrm{Zr}(^{16}\mathrm{O}$, $3n\ensuremath{\gamma})$, $E=58$ MeV; $^{94}\mathrm{Zr}(^{16}\mathrm{O},4n\ensuremath{\gamma})$, $E=63$ MeV; $^{94}\mathrm{Zr}(^{16}\mathrm{O},3n\ensuremath{\gamma})$, $E=59$ MeV; $^{96}\mathrm{Zr}(^{16}\mathrm{O},4n\ensuremath{\gamma})$, $E=56$ MeV; $^{96}\mathrm{Zr}(^{16}\mathrm{O},3n\ensuremath{\gamma})$, $E=56$ MeV. Linear polarization of $^{105\ensuremath{-}106}\mathrm{Cd}$ $\ensuremath{\gamma}$ rays measured.]