Development of 100 Mo -containing scintillating bolometers for a high-sensitivity neutrinoless double-beta decay search.

This paper reports on the development of a technology involving 100 Mo -enriched scintillating bolometers, compatible with the goals of CUPID, a proposed next-generation bolometric experiment to search for neutrinoless double-beta decay. Large mass ( ∼ 1 kg ), high optical quality, radiopure 100 Mo -containing zinc and lithium molybdate crystals have been produced and used to develop high performance single detector modules based on 0.2-0.4 kg scintillating bolometers. In particular, the energy resolution of the lithium molybdate detectors near the Q-value of the double-beta transition of 100 Mo (3034 keV) is 4-6 keV FWHM. The rejection of the α -induced dominant background above 2.6 MeV is better than 8 σ . Less than 10 µ Bq/kg activity of 232 Th ( 228 Th ) and 226 Ra in the crystals is ensured by boule recrystallization. The potential of 100 Mo -enriched scintillating bolometers to perform high sensitivity double-beta decay searches has been demonstrated with only 10 kg × d exposure: the two neutrino double-beta decay half-life of 100 Mo has been measured with the up-to-date highest accuracy as T 1 / 2 = [6.90 ± 0.15(stat.) ± 0.37(syst.)] × 10 18 years . Both crystallization and detector technologies favor lithium molybdate, which has been selected for the ongoing construction of the CUPID-0/Mo demonstrator, containing several kg of 100 Mo .

[Influence of the environmental hygienic state on the intellectual development of Voronezh schoolchildren].

Voronezh belongs to the areas that have a poor hygienic situation in the environmental pollution with heavy metal compounds. The subject of the studies was pupils from 2 Voronezh schools situated in the areas hygienically contrast in the ambient air and soil pollution with heavy compounds. Their intellectual development was studied. A total of 245 pupils from the 2nd, 7th, and 10th forms were examined. The best intellectual development indices were recorded among all age groups of children living in the hygienically favorable areas. The findings are in agreement with the data published by Russian and foreign investigators.

[Effective forms of the work of a pediatric polyclinic]. / Effektivnye formy raboty detskoi polikliniki.

The experience gained in the organization of a day hospital for 100 beds on the basis of a health centre of a city children's polyclinic is presented. A new organizational form has become possible due to adequate fittings with diagnostic equipment and medicaments. 1258 children were treated in the day hospital for 3 years. Thus it became possible to improve servicing of the children registered for medical supervision and to decrease the number of acute conditions by 2.5. Both parents and children approved of the feasibility of treatment in day hospitals.