No abstract

The 7-ray spectrum from the decay of "'I was measured with smalland large-volume, high-resolution Ge(Li) detectors, and 116transitions were assigned in its decay. Selected regions of the conversion-electron spectrum were measured with an iron double-focusing spectrometer. The IC-conversion coefficient of the 772-keV transition that was measured relative to the X-conversion coefficient of the 662-keV transition in '"Ba was used to normalize the electron and y spectra to obtain the K-conversion coefficients of the 262., and. 1398. 6-keV transitions. Conversion coeKcients of additional transitions were obtained from electron intensities of other work. From these conversion coeKcients, each of the above transitions was assigned an bI1 and/or Z2 multipolarity.

The Y-ray yield from the S 34 (/vy)Cl 35 reaction shows strong resonances at proton energies of 1214 and 1512 keV. These resonance states occur at the correct energies to be isobaric analogs of the 1.99-and 2.35-MeV states in S 35 , respectively. Angular-distribution, triple-correlation, and polarization measurements have been performed at each of these resonances. The 1214-keV resonance, which corresponds to an excitation energy of 7.54 MeV in CI 35 , has spin and parity of J~, and decays almost entirely to the 3.16-MeV level, which was also found to have spin and parity of |~. The transition is pure Ml and has a measured strength of 1.6rfc0.3 Weisskopf units (W.u.). The 1512-keV resonance, which corresponds to an excitation energy of 7.84 MeV, has a spin and parity of f~~, and decays strongly to the 4.17-MeV level, which was found to be a f~ state. This transition is also pure Ml with a strength of 1.0±0.3 W.u. The value of d p 2 is about 0.2 for both the 1214-keV and the 1512-keV resonance, which compares favorably with the value of 0 P 2 = J calculated for the pure single-nucleon/7/2, T=| and pw, T=| configurations respectively. This agrees with the large (d,p) stripping width of the analog states at 1.99 and 2.35 MeV in S 35 . The levels at 3.16 and 4.17 MeV appear to be of the same configuration as the corresponding resonance states, and to differ only in isobaric spin, having T~\. Values for the reduced widths, energies, and isobaric-spin splitting of the T > and T< states, and for the Ml transition speeds assuming pure single-nucleon states, have been calculated and are in good agreement with observed values.

Results of Hall-effect and resistivity measurements on semi-insulating undoped AgGaS2 are reported. Both shallow (∼0.11 eV) and deep (∼0.72 eV) acceptor levels were observed from p-type crystals. Crystal resistance is not readily changed by heat treatment.

Heat transfer in glass-forming operations depends on many factors,,e.g. the properties of the glass, heat-transfer coefficients at the glass/mold and mold/air interfaces, the characteristics of the mold material, and the glass/mold contact time. Using a computer model developed for one-dimensional heat flow, the influences of these factors were calculated. The heat-transfer parameters, which were analyzed individually, include e.g. the glass surface temperature, the peak inner mold surface temperature, the quantity of heat transferred from glass to mold during a steady-state cycle, and the amplitude of mold surface temperature oscillation at steady state. Comments are given on the significance of the results.