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[en] We overview the progress made recently in pursuit of antihydrogen formation by the interaction of cold antiprotons, held in a Penning trap, with injected positronium atoms. We describe the relevant details of the antiproton catching scheme, based upon the PS200 trap, and our goals before antihydrogen can be observed. A method of accumulating low-energy positrons to provide the required large bursts of positronium atoms is described. The antihydrogen-formation rate for the simplest reaction is estimated, and its implications for the production and detection scenario are examined. An experiment to observe the charge-conjugate reaction, namely hydrogen formation in proton-positronium collisions, is summarized
[en] The minimal metagravity theory, explicitly violating the general covariance but preserving the unimodular one, is applied to study the evolution of the isotropic homogeneous Universe. The massive scalar graviton, contained in the theory in addition to the massless tensor one, is treated as a source of the dark matter and/or dark energy. The modified Friedmann equation for the scale factor of the Universe is derived. The question wether the minimal metagravity can emulate the LCDM concordance model, valid in General Relativity, is discussed.
[en] The γ spectrum, the angular distributions, and the linear polarization of γ rays are measured along with the lifetimes of levels in the 140Ce(n,n'γ) reaction using fast reactor neutrons. The multiple mixtures in a large number of γ transitions are determined, and the completeness of the level scheme of 140Ce up to Eexc = 3.3 MeV with J = 1-5 is established. 7 refs., 2 figs., 4 tabs
[en] Under the explicit violation of the general covariance to the unimodular one, the effect of the emerging scalar graviton on the static spherically symmetric metrics is studied. The main results are threefold. First, there appears the two-parametric family of such metrics, instead of the one-parametric black-hole family in General Relativity (GR). Second, there may exist the one-parametric subfamily describing a peculiar object, the 'graviball', missing in GR. Third, in a simplifying assumption, all the metrics possess the correct Newtonian limit as in GR.