Changes in general health of population exposed to chernobyl catastrophy : pathogenetic features in Mogilev Region

In paper the outcomes of perennial overseeing of state of health of the population of the Mogilev region, the victim owing to Chernobyl catastrophe are analysed. Presence of a fixed pathomorphism of development of the diseases stipulated unfavorable long-level low radiation injury. It is shown, that negative effects of influence of ionizing radiation at a cell-like level are realized by means of two key mechanisms: damage of a genetical means cells (mutagenesis) which shows stochastic augmentation of frequency of developmental anomalies and oncologic diseases; and cytotoxity, connected with epigenetic effects on the trancription, the translational, posttranslational levels, carrying not stochastic character, and adducting at a long activation to cell destruction by necrosis, and apoptosis (development of the last in this case has stochastic character). Use of a principle of the interdisciplinary approach with research of a cellular - cell-like and cellular - humoral regulation of a homeostasis is efficient enough in study of a possible pathogenesis of unfavorable consequences long-level low radiation action.Проанализированы результаты анализа состояния здоровья населения Могилевской области, пострадавшего в результате Чернобыльской катастрофы. Определено наличие типичного патоморфизма развития заболеваний вследствие длительного воздействия низкого уровня радиации. Показано, что негативные воздействия ионизирующей радиации на клеточном уровне осуществляются двумя возможными путями: повреждение на генетическом уровне (мутагенез), приводящее к стохастическому увеличению частоты аномалий развития и онкологических заболеваний; и цитотоксичность, связанная с эпигенетическими влияниями на транскрипционном, трансляционном и посттрансляционном уровнях, имеющими нестохастический характер и приводящими к разрушению клеток путем некроза и апоптоза (развитие последнего имеет в данном случае стохастический характер). Применение принципа междисциплинарного подхода, изучение клеточной и гуморальной регуляции гомеостаза позволяет исследовать возможные механизмы возникновения неблагоприятных последствий длительного воздействия низкоуровневой радиации

Latest results of dark matter detection with the DarkSide experiment

In this contribution the latest results of dark matter direct detection obtained by the DarkSide Collaboration are discussed. New limits on the scattering cross-section between dark matter particles and baryonic matter have been set. The results have been reached using the DarkSide-50 detector, a double-phase Time Projection Chamber (TPC) filled with 40Ar and installed at Laboratori Nazionali del Gran Sasso (LNGS). In 2018, the DarkSide Collaboration has performed three different types of analysis. The so-called high-mass analysis into the range between ∼ 10 GeV and ∼ 1000 GeV is discussed under the hypothesis of scattering between dark matter and Ar nuclei. The low-mass analysis, performed using the same hypothesis, extends the limit down to ∼1.8 GeV. Through a different hypothesis, that predicts dark matter scattering off the electrons inside of the Ar atom, it has been possible to set limits for sub-GeV dark matter masses

Measurement of the ion fraction and mobility of 218Po produced in 222Rn decays in liquid argon

reserved166siWe report measurements of the charged daughter fraction of 218Po as a result of the 222Rn alpha decay, and the mobility of 218Po+ ions, using radon-polonium coincidences from the 238U chain identified in 532 live-days of DarkSide-50 WIMP-search data. The fraction of 218Po that is charged is found to be 0.37 ± 0.03 and the mobility of 218Po+ is (8.6 ± 0.1) × 10−4 cm Vs2.mixedAgnes, P.; Albuquerque, I.F.M.; Alexander, T.; Alton, A.K.; Ave, M.; Back, H.O.; Batignani, G.; Biery, K.; Bocci, V.; Bonfini, G.; Bonivento, W.M.; Bottino, B.; Bussino, S.; Cadeddu, M.; Cadoni, M.; Calaprice, F.; Caminata, A.; Canci, N.; Candela, A.; Caravati, M.; Cariello, M.; Carlini, M.; Carpinelli, M.; Catalanotti, S.; Cataudella, V.; Cavalcante, P.; Cavuoti, S.; Chepurnov, A.; Cicalò, C.; Cocco, A.G.; Covone, G.; D'Angelo, D.; Davini, S.; Candia, A. De; Cecco, S. De; Deo, M. De; Filippis, G. De; Rosa, G. De; Derbin, A.V.; Devoto, A.; Eusanio, F. Di; D'Incecco, M.; Pietro, G. Di; Dionisi, C.; Downing, M.; D'Urso, D.; Edkins, E.; Empl, A.; Fiorillo, G.; Fomenko, K.; Franco, D.; Gabriele, F.; Galbiati, C.; Ghiano, C.; Giagu, S.; Giganti, C.; Giovanetti, G.K.; Gorchakov, O.; Goretti, A.M.; Granato, F.; Grobov, A.; Gromov, M.; Guan, M.; Guardincerri, Y.; Gulino, M.; Hackett, B.R.; Herner, K.; Hosseini, B.; Hughes, D.; Humble, P.; Hungerford, E.V.; Ianni, Al.; Ianni, An.; Ippolito, V.; Johnson, T.N.; Keeter, K.; Kendziora, C.L.; Kochanek, I.; Koh, G.; Korablev, D.; Korga, G.; Kubankin, A.; Kuss, M.; Commara, M. La; Lai, M.; Li, X.; Lissia, M.; Longo, G.; Machado, A.A.; Machulin, I.N.; Mandarano, A.; Mapelli, L.; Mari, S.M.; Maricic, J.; Martoff, C.J.; Messina, A.; Meyers, P.D.; Milincic, R.; Monte, A.; Morrocchi, M.; Muratova, V.N.; Musico, P.; Agasson, A. Navrer; Nozdrina, A.O.; Oleinik, A.; Orsini, M.; Ortica, F.; Pagani, L.; Pallavicini, M.; Pandola, L.; Pantic, E.; Paoloni, E.; Pelczar, K.; Pelliccia, N.; Picciau, E.; Pocar, A.; Pordes, S.; Poudel, S.S.; Qian, H.; Ragusa, F.; Razeti, M.; Razeto, A.; Renshaw, A.L.; Rescigno, M.; Riffard, Q.; Romani, A.; Rossi, B.; Rossi, N.; Sablone, D.; Samoylov, O.; Sands, W.; Sanfilippo, S.; Savarese, C.; Schlitzer, B.; Segreto, E.; Semenov, D.A.; Shchagin, A.; Sheshukov, A.; Singh, P.N.; Skorokhvatov, M.D.; Smirnov, O.; Sotnikov, A.; Stanford, C.; Stracka, S.; Suvorov, Y.; Tartaglia, R.; Testera, G.; Tonazzo, A.; Trinchese, P.; Unzhakov, E.V.; Verducci, M.; Vishneva, A.; Vogelaar, R.B.; Wada, M.; Waldrop, T.J.; Wang, H.; Wang, Y.; Watson, A.W.; Westerdale, S.; Wojcik, M.M.; Xiang, X.; Xiao, X.; Yang, C.; Ye, Z.; Zhu, C.; Zuzel, G.Agnes, P.; Albuquerque, I. F. M.; Alexander, T.; Alton, A. K.; Ave, M.; Back, H. O.; Batignani, G.; Biery, K.; Bocci, V.; Bonfini, G.; Bonivento, W. M.; Bottino, B.; Bussino, S.; Cadeddu, M.; Cadoni, M.; Calaprice, F.; Caminata, A.; Canci, N.; Candela, A.; Caravati, M.; Cariello, M.; Carlini, M.; Carpinelli, M.; Catalanotti, S.; Cataudella, V.; Cavalcante, P.; Cavuoti, S.; Chepurnov, A.; Cicalò, C.; Cocco, A. G.; Covone, G.; D'Angelo, D.; Davini, S.; Candia, A. De; Cecco, S. De; Deo, M. De; Filippis, G. De; Rosa, G. De; Derbin, A. V.; Devoto, A.; Eusanio, F. Di; D'Incecco, M.; Pietro, G. Di; Dionisi, C.; Downing, M.; D'Urso, D.; Edkins, E.; Empl, A.; Fiorillo, G.; Fomenko, K.; Franco, D.; Gabriele, F.; Galbiati, C.; Ghiano, C.; Giagu, S.; Giganti, C.; Giovanetti, G. K.; Gorchakov, O.; Goretti, A. M.; Granato, F.; Grobov, A.; Gromov, M.; Guan, M.; Guardincerri, Y.; Gulino, M.; Hackett, B. R.; Herner, K.; Hosseini, B.; Hughes, D.; Humble, P.; Hungerford, E. V.; Ianni, Al.; Ianni, An.; Ippolito, V.; Johnson, T. N.; Keeter, K.; Kendziora, C. L.; Kochanek, I.; Koh, G.; Korablev, D.; Korga, G.; Kubankin, A.; Kuss, M.; Commara, M. La; Lai, M.; Li, X.; Lissia, M.; Longo, G.; Machado, A. A.; Machulin, I. N.; Mandarano, A.; Mapelli, L.; Mari, S. M.; Maricic, J.; Martoff, C. J.; Messina, A.; Meyers, P. D.; Milincic, R.; Monte, A.; Morrocchi, M.; Muratova, V. N.; Musico, P.; Agasson, A. Navrer; Nozdrina, A. O.; Oleinik, A.; Orsini, M.; Ortica, F.; Pagani, L.; Pallavicini, M.; Pandola, L.; Pantic, E.; Paoloni, E.; Pelczar, K.; Pelliccia, N.; Picciau, E.; Pocar, A.; Pordes, S.; Poudel, S. S.; Qian, H.; Ragusa, F.; Razeti, M.; Razeto, A.; Renshaw, A. L.; Rescigno, M.; Riffard, Q.; Romani, A.; Rossi, B.; Rossi, N.; Sablone, D.; Samoylov, O.; Sands, W.; Sanfilippo, S.; Savarese, C.; Schlitzer, B.; Segreto, E.; Semenov, D. A.; Shchagin, A.; Sheshukov, A.; Singh, P. N.; Skorokhvatov, M. D.; Smirnov, O.; Sotnikov, A.; Stanford, C.; Stracka, S.; Suvorov, Y.; Tartaglia, R.; Testera, G.; Tonazzo, A.; Trinchese, P.; Unzhakov, E. V.; Verducci, M.; Vishneva, A.; Vogelaar, R. B.; Wada, M.; Waldrop, T. J.; Wang, H.; Wang, Y.; Watson, A. W.; Westerdale, S.; Wojcik, M. M.; Xiang, X.; Xiao, X.; Yang, C.; Ye, Z.; Zhu, C.; Zuzel, G

DarkSide: Latest results and future perspectives

International audienceDarkSide is direct-detection dark-matter experimental project based on radiopure argon. The main goal of the DarkSide program is the detection of rare nuclear elastic collisions with hypothetical dark-matter particles. The present detector, DarkSide-50, placed at Laboratori Nazionali del Gran Sasso (LNGS), is a dualphase time projection chamber (TPC) filled with ultra-pure liquid argon, extracted from underground sources. Surrounding the TPC to suppress the background there are neutron and muon active vetoes. One of argon key features is the capability to distinguish between electron and nuclear recoils, exploiting the different shapes of the signals. DarkSide-50 new results, obtained using a live-days exposure of 532.4 days, are presented. This analysis sets a 90% C.L. upper limit on the dark matternucleon spin-independent cross-section of 1.1 × 10−44 cm2 for a WIMP mass of 100 GeV/c2. The next phase of the project, DarkSide-20k, will be a new detector with a fiducial mass of ∼ 20 tons, equipped with cryogenic silicon photomultipliers (SiPM)

DarkSide status and prospects

International audienceDarkSide uses a dual-phase Liquid Argon Time Projection Chamber to search for WIMP dark matter. The current detector, DarkSide-50, is running since mid 2015 with a target of 50 kg of Argon from an underground source. Here it is presented the latest results of searches of WIMP-nucleus interactions, with WIMP masses in the GeV-TeV range, and of WIMP-electron interactions, in the sub-GeV mass range. The future of DarkSide with a new generation experiment, involving a global collaboration from all the current Argon based experiments, is presented

New Physics Results from DarkSide-50

International audienceDarkSide-50 is dual-phase liquid argon time projection chamber designed for WIMP search and installed at Gran Sasso underground laboratory. We present new constraints on dark matter particles scattering off nuclei and electrons from a 532.4 live-days exposure