[en] Compounds of the type Ni(S₂CNRR')₂, where RR'=Et₂ (1), MeEt (2), MeⁿBu (3) and MeⁿHex (4), have been synthesized and used as single-source precursors for the fabrication of binary nickel sulfide thin films via low-pressure metal-organic chemical vapour deposition. The phase of films deposited on glass substrates was found to be NiS_1.03 or a mixture of NiS_1.03 and NiS. The films have been characterised by X-ray powder diffraction, scanning electron microscopy, transition electron microscopy and energy dispersive analysis of X-rays

[en] The reaction pd → p)pπ^-p is studied at 19 and 28 GeV/c with data from the Brookhaven National Laboratory 80-in. deuterium-filled bubble chamber. In addition, a separate study is made of the low-momentum pion spectra in selected low-multiplicity events presumed to be associated with either of two isospin-conjugate modes of deuteron fragmentation by a 28-GeV/c beam proton. Our results from these complementary studies are that low-multiplicity channels are dominantly of a diffractive nature; however, significant differences seen in the mass spectra and angular correlations in the slow pπ^- between the 19- and 28-GeV/c data indicate that asymptotic behavior has not been reached, as least at 19 GeV/c. Neither s- nor t-channel helicity conservation is seen in the excitation of the target neutron into a low-mass pπ^- system. The N* (1.4) of missing-mass experiments is shown to be a superposition of nucleon-pion and nucleon--two-pion states

[en] We report on new measurements of the Σ⁺ and Σ^- lifetimes, the Σ⁺ nonleptonic-decay branching ratio, and the ratio of the Σ⁺ decay asymmetry parameters α/sub +//α₀. The final results obtained are tau⁺0.798=(ts +- 0.005) x 10^-10 sec, tau^-1.480=(ts +- 0.014) x 10^-10 sec, R=GAMMA(Σ⁺ → pπ⁰)/GAMMA(Σ⁺ → all)=0.5172 +- 0.0036, and α/sub +//α₀=-0.073 +- 0.021. These results together with the world average for α₀ areused to perform a test of the vertical-bar ΔI vertical-bar=1/2 rule

[en] This paper develops a methodology for extracting the Curie temperature distribution from magnetisation versus temperature measurements which are realizable by standard laboratory magnetometry. The method is integral in nature, robust against various sources of measurement noise, and can be adopted to a wide range of granular magnetic materials and magnetic particle systems. The validity and practicality of the method is demonstrated using large-scale Monte–Carlo simulations of an Ising-like model as a proof of concept, and general conclusions are drawn about its applicability to different classes of systems and experimental conditions. (letter)

No abstract available

No abstract available

[en] Photolysis of vibrationally excited oxygen produced by ultraviolet photolysis of ozone in the upper stratosphere is incorporated into the Lawrence Livermore National Laboratory 2-D zonally averaged chemical-radiative-transport model of the troposphere and stratosphere. The importance of this potential contributor of odd oxygen to the concentration of ozone is evaluated based upon recent information on vibrational distributions of excited oxygen and upon preliminary studies of energy transfer from the excited oxygen. When the energy transfer rate constants of previous work are assumed, increases in model ozone concentrations of up to 40 percent in the upper stratosphere are found, and the ozone concentrations of the model agree with measurements, including data from the Upper Atmosphere Research Satellite. However, the increase is about 0.4 percent when the larger energy transfer rate constants suggested by more recent experimental work are applied in the model. This indicates the importance of obtaining detailed information on vibrationally excited oxygen properties, particularly the state-specific energy transfer rate constants, to evaluation of tills precess for stratospheric modeling

[en] In an experiment performed at the CERN PS using the HYperon BUbble Chamber (HYBUC), we have measured the asymmetry parameter αsub(γ) for the decay Σ ⁺ → pγ. The result is αsub(γ) = -0.53 ⁺⁰sup(.)³⁸sub(-)₀sub(.)₃₆. For the branching ratio we find GAMMA(Σ⁺ → pγ)/GAMMA(Σ^- → pπ⁰) = (2.11 +- 0.38) x 10^-3. (orig.)

[en] We report on the final result of a precision measurement of the Σ⁺ magnetic moment using the hyperon bubble chamber HYBUC. HUYBUC is a hydrogen bubble chamber with an 11.5 T superconducting magnet and was built by the Max-Planck-Institut fuer Physik und Astrophysik and Vanderbilt University for this experiment. A detailed description of the experiment, apparatus, and analysis is given. The final result is μΣ+ = (2.30 +- 0.14) μsub(N). (orig.)

[en] We report on the final result of a precision measurement of the Σ⁺ magnetic moment using the hyperon bubble chamber (HYBUC). HYBUC is a hydrogen bubble chamber with an 11.5-T superconducting magnet and was built by the Max-Planck-Institut fuer Physik und Astrophysik and Vanderbilt University for this experiment. A detailed description of the experiment, apparatus, and analysis is given. The final result is μ/sub Σ/+= (2.30 +- 0.14) μ/sub N/