Inelastically scattered IX-particles from the reaction 32S(IX, 1X')32S have been studied with solid state counters at extreme backward angles in order to determine spin-parity combinations for levels in 32S at excitation energies Ex up to 7 ·15 MeV. The results confirm the well-established spin and parity values, show that the 5· 798 MeV spin 1 state has negative parity, and provide narrow limits for the possible spin and parity values of the 6'410,6' 666,6' 762, and 6· 854 MeV levels. A previously unreported natural parity level was found at Ex = 6·58 MeV. Magnetic analysis of the reaction 32S(p, p')32S confirmed the existence of this level and established its excitation energy as 6·581±0·003 MeV. Particle-y-ray coincidence studies showed that this level decays predominantly by y-ray transitions to the 2·23 MeV 2 + state.

Studies are presented of the static quadrupole interaction of the 482 keV level of 181Ta in a polycrystalline HfO2 source, made using a differential perturbed angular correlation (PAC) method. The experimental procedure and method of analysis are described and the results obtained for the following interaction parameters are: the transition frequencies ω0 = 819 ± 10, ω1 ± 1483 ± 25, ω2 = 2350 ± 50 Mrad/s, the quadrupole interaction frequency ωQ = 125.8 ± 1.9 Mrad/s, the asymmetry parameter η = 0.283 ± 0.027, and the electric field gradient at active lattice sites Vzz = 13.1 ± 0.6 × 1017 V/cm2. These results are compared with those recently obtained by other workers in this field.

The reaction 32S(p,p'y)32S has been studied with a 12'7 cm by 10·2 cm NaI(TI) y-ray detector in conjunction with a 61 cm double-focusing magnetic spectrometer to determine the y-ray decay schemes of all known levels in 32S between the excitation energies of 5·40 and 7· 15 MeV.

The value of the hyperfine field on Ta nuclei implanted in a nickel lattice was determined at room temperature by time-differential perturbed angular correlation measurements both with and without an external polarizing magnetic field. The value is −89.9 ± 1.0 kG.

A perturbed angular correlation study of 111Cd ions in frozen aqueous solutions of InCl3 and In(NO3)3 has demonstrated the variation in behavior of these systems with temperature from − 140 to − 20°C. At the lowest temperature a strong static quadrupole interaction (ωQ = 1.6 × 107rad/sec) was observed. Above − 80°C, a time-dependent perturbation was found, and the temperature dependence of the correlation time was measured.