The full data set of the NEMO-3 experiment has been used to measure the half-life of the two-neutrino double beta decay of 100 Mo to the ground state of 100 Ru,

The DANSS project is aimed at creating a relatively compact neutrino spectrometer which does not contain any flammable or other dangerous liquids and may therefore be located very close to the core of an industrial power reactor. As a result, it is expected that high neutrino flux would provide about 15,000 IBD interactions per day in the detector with a sensitive volume of 1 m 3 . High segmentation of the plastic scintillator will allow to suppress a background down to a ∼1% level. Numerous tests performed with a simplified pilot prototype DANSSino under a 3 GW th reactor of the Kalinin NPP have demonstrated operability of the chosen design.The DANSS detector surrounded with a composite shield is movable by means of a special lifting gear, varying the distance to the reactor core in a range from 10 m to 12 m. Due to this feature, it could be used not only for the reactor monitoring, but also for fundamental research including short-range neutrino oscillations to the sterile state. Supposing one-year measurement, the sensitivity to the oscillation parameters is expected to reach a level of sin 2 (2θnew) ∼ 5 × 10 −3 with ∆m 2 ⊂ (0.02 − 5.0) eV 2 .

Using time-differential perturbed angular correlation spectroscopy we have measured the electric field gradient ͑EFG͒ at 111 Cd probe nuclei in solid Ce in a pressure range up to 8 GPa. Covering various allotropic phases of Ce, we find that the value of the EFG in the cubic ␣ phase is almost four times larger than in the cubic ␥ phase and close to values in the noncubic phases ␣Ј and ␣Љ. These results together with the differences in time modulation of the spectra are interpreted as evidence for quadrupolar electronic charge-density ordering and symmetry lowering at the ␥ → ␣ transition while the lattice remains face-centered cubic.

No abstract

We report the high-pressure synthesis of novel superconductor MgB 2 and some related compounds. The superconducting transition temperature of our samples of MgB 2 is found to be 36.6 K. The MgB 2 lattice parameters determined via X-ray diffraction are in excellent agreement with results of our ab initio calculations. The TDPAC measurements of 111 Cd quadrupole frequency ν Q demonstrate a small increase in ν Q with decreasing temperature from T room to T He .The electric field gradient V zz at the B site calculated from first principles is in fair agreement with V zz obtained from 11 B NMR spectra of MgB 2 reported in the literature. It is also very close to V zz found in our 111 Cd TDPAC experiments, which suggests that the 111 Cd probe substitutes for boron in the MgB 2 lattice.

No abstract

DANSSino is a reduced pilot version of a solid-state detector of reactor antineutrinos (to be created within the DANSS project and installed under the industrial 3 GW(th) reactor of the Kalinin Nuclear Power Plant -- KNPP). Numerous tests performed at a distance of 11 m from the reactor core demonstrate operability of the chosen design and reveal the main sources of the background. In spite of its small size (20x20x100 ccm), the pilot detector turned out to be quite sensitive to reactor antineutrinos, detecting about 70 IBD events per day with the signal-to-background ratio about unity.Comment: 16 pages, 11 figures, 3 tables. arXiv admin note: substantial text overlap with arXiv:1304.369

No abstract