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Поздравляем с Первой премией ОИЯИ за 2018 г. в разделе “Научно-исследовательские экспериментальные работы” группу эксперимента «BOREXINO» за цикл из трех работ: “Исследование свойств нейтрино из реакций pp-цикла на Солнце с помощью детектора Борексино”! Премию получили: Олег Смирнов, Алина Вишнева и Альберт Сотников.
Желаем новых ярких научных открытий и радости от полученных результатов!

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The international collaboration Вorexino published yesterday, on 24 October, in Nature the compendium of its results on neutrinos, accompanying the thermonuclear processes in the Sun. 

The Borexino detector is ultrasensitive instrument constructed for the Solar neutrino studies. Detector registers neutrino from the Sun by scintillation light from the scattered off electrons in the liquid organic scintillator of the total mass of 300 tonnes. The concentration of radioactive elements in the central part of the detector is lower by a factor of 1010 compared to the typical ones in ordinary materials. The ultra-low level of radioactivity achieved in the detector is one of the milestones of the Borexino project success.

 

The DarkSide-50 experiment is aimed at searching for dark-matter weakly interacting particles (WIMPs) with a large mass (>50 GeV), where a critical fact is the possibility of separating the signal from the possible background. The recently accomplished analysis of the data collected for 532 operation days of the facility days demonstrated unique capabilities of suppressing the background in the detector. An additional analysis of the low-energy region of the spectrum of the ionization events demonstrated that the DarkSide-50 detector was sensitive to low masses (<10 GeV) of dark-matter particles.  These results add more confidence in that the observation of a positive signal in the second-generation facility, such as the projected DarkSide-20k experiment, will really mean observation of particles of a new nature.

For more detail, see here.

 

 

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The DarkSide-50 experiment in operation at the Gran Sasso National Laboratories in Italy reported important new results on its search for dark matter, at the UCLA Dark Matter 2018 conference and at the Lake Louise Winter Institute 2018.

DarkSide-50 was designed as a search for high mass (>50 GeV/c2) Weakly Interacting Massive Particles (WIMPs) where the critical feature is background rejection. Analysis of a 530 day exposure has just been completed and the result is a convincing demonstration of the rejection capabilities of the technology. The discrimination achieved between natural radioactivity and nuclear recoils is a strong confirmation of the capabilities of the liquid argon technology. In addition to this achievement, a novel analysis of the ionization signal from low-energy events has been developed which demonstrates that the DarkSide-50 detector has outstanding capabilities in the search for lower mass (<10 GeV/c2) dark matter. These results encourage confidence that if a signal is eventually detected in a larger argon-based detector, like the upcoming DarkSide-20k, the signal will indeed be from something new in nature.

 

On October 15-21, 2017, Catania hosted the Conference on Physics of Neutrino and Nuclear Physics (CNNP 2017), organized together by the National Institute of Nuclear Physics, the National Laboratory of the South and the Faculty of Physics and Astronomy of the University of Catania (Clementina Agui and Francesco Cappucello chairs). The main goal of the conference was to promote collaboration among scientists working in the field of nuclear physics, neutrino physics, astrophysics and dark matter physics, for discussion of experiments and theoretical concepts in which aspects of nuclear physics are particularly of interest. Forty-four reports from world leading experts in these fields were made during the conference. Russia was represented by Oleg Smirnov, an employee of our laboratory,  with a report "Geoneutrinos: experimental status and prospects."