[en] Dielectrophoresis of non-spherical particles is attracting attention, particularly for the aligned deposition of nanowires and nanotubes. The orientation and translation of ellipsoids are studied theoretically, and it is found that the orientation plays a significant role in determining the particle trajectory. A new equation for dielectrophoresis is presented which allows for orientation to be taken into account. Numerical simulation of particle motion is performed to demonstrate these effects.
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[en] We have measured the half-life of 14O, a superallowed (0+→0+) β decay isotope. The 14O was produced by the 12C(3He,n)14O reaction using a carbon aerogel target. A low-energy ion beam of 14O was mass separated and implanted in a thin beryllium foil. The beta particles were counted with plastic scintillator detectors. We find t1/2=70.696±0.052 s. This result is 1.5σ higher than an average value from six earlier experiments, but agrees more closely with the most recent previous measurement
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