The present status of searches for the neutrino magnetic moment (NMM) down to 3×10−11 μB is brief... more The present status of searches for the neutrino magnetic moment (NMM) down to 3×10−11 μB is briefly discussed. The low background Ge-NaI spectrometer GEMMA constructed in ITEP for NMM measurement is described and the results of the test background measurements at a small depth of 5 m.w.e in ITEP are reported. The analysis of these results shows that the limit on NMM at the level (2 ÷ 3)·10−11 μB can be achieved during 2 year duration of measurements with spectrometer GEMMA at Kalininskaya Nuclear Power Plant (KNPP). The prospects of breakthrough to the limit on NMM about 10−12 μB are outlined.
The time-differential perturbed angular correlations technique (TDPAC) has been employed for meas... more The time-differential perturbed angular correlations technique (TDPAC) has been employed for measuring the parameters of hyperfine interactions in earlier known RAl 3 compounds, synthesized at high pressure (8 GPa) and high temperature, where R = La, Ce, Sm, Gd, Tb, Dy, Ho, Er, Yb and Lu. The 111 Cd( 111 In) radioactive atom was used as a probe nucleus. The X-ray method has revealed that with the increase in the atomic number of a rare-earth element R, the obtained RAl 3 high-pressure phases crystallize, respectively, into orthorhombic, hexagonal and cubic structures. It has been found that in the compounds containing R = La, Ce, Sm and Gd, a deviation from earlier known structural types and the formation of new ones is observed, which is associated with the change of the stoichiometric composition of the said compounds. The results of the PAC measurements have confirmed the deviation from the predetermined stoichiometric composition 1R:3Al for the compounds LaAl 3 , CeAl 3 , SmAl 3 and GdAl 3 and have verified the RAl 3 stoichiometric structure for the other high-pressure phases obtained in this work.
The present status of searches for the neutrino magnetic moment (NMM) down to 3×10−11 μB is brief... more The present status of searches for the neutrino magnetic moment (NMM) down to 3×10−11 μB is briefly discussed. The low background Ge-NaI spectrometer GEMMA constructed in ITEP for NMM measurement is described and the results of the test background measurements at a small depth of 5 m.w.e in ITEP are reported. The analysis of these results shows that the limit on NMM at the level (2 ÷ 3)·10−11 μB can be achieved during 2 year duration of measurements with spectrometer GEMMA at Kalininskaya Nuclear Power Plant (KNPP). The prospects of breakthrough to the limit on NMM about 10−12 μB are outlined.
The time-differential perturbed angular correlations technique (TDPAC) has been employed for meas... more The time-differential perturbed angular correlations technique (TDPAC) has been employed for measuring the parameters of hyperfine interactions in earlier known RAl 3 compounds, synthesized at high pressure (8 GPa) and high temperature, where R = La, Ce, Sm, Gd, Tb, Dy, Ho, Er, Yb and Lu. The 111 Cd( 111 In) radioactive atom was used as a probe nucleus. The X-ray method has revealed that with the increase in the atomic number of a rare-earth element R, the obtained RAl 3 high-pressure phases crystallize, respectively, into orthorhombic, hexagonal and cubic structures. It has been found that in the compounds containing R = La, Ce, Sm and Gd, a deviation from earlier known structural types and the formation of new ones is observed, which is associated with the change of the stoichiometric composition of the said compounds. The results of the PAC measurements have confirmed the deviation from the predetermined stoichiometric composition 1R:3Al for the compounds LaAl 3 , CeAl 3 , SmAl 3 and GdAl 3 and have verified the RAl 3 stoichiometric structure for the other high-pressure phases obtained in this work.
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Papers by V. Brudanin