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Przejdź do strony domowej biblioteki Pedagogiczna Biblioteka Wojewódzka im. Komisji Edukacji Narodowej w Lublinie Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaPedagogiczna Biblioteka Wojewódzka im. Komisji Edukacji Narodowej w Lublinie
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Wyświetlanie 1-10 z 128
Tytuł:
Cosmogenic radionuclides in the Sołtmany (L6) meteorite
Autorzy:
Laubenstein, M.
Giampaoli, A.
Janowski, P.
Mietelski, J. W.
Tematy:
meteorite
ordinary chondrite
short-lived radionuclides
cosmogenic radionuclides
gamma-ray spectrometry
52Mn
Pokaż więcej
Wydawca:
Polskie Towarzystwo Meteorytowe
Powiązania:
https://bibliotekanauki.pl/articles/411508.pdf  Link otwiera się w nowym oknie
Opis:
Cosmogenic radionuclides were measured in two specimens of the Sołtmany chondrite (L6) that fell on April 30, 2011. The first fragment (154.9 g) was measured 12 days after the fall and the second piece (120 g), 53 days after the fall. Both fragments were measured by means of non-destructive gamma ray spectroscopy. The first specimen was examined with an ultra-low background high purity germanium (HPGe) detector in a deep underground laboratory. A standard low-background HPGe detector was used to examine the second fragment in a ground level laboratory. Twelve cosmogenic nuclides were detected in the activity range of 0.030 m・Bq g–1 until 1.5 m・Bq g–1 Their activities place constraints on the exposure history of the meteorite and reflect the effect of solar modulation of galactic cosmic rays during the solar maximum. On the activities of expected radionuclides 60 Co (< 0.0075 m・Bq g–1) and 44 Ti (< 0.023 m・Bq g–1) only upper limits could be given. Sołtmany is part of a group of only 14 meteorites where 52 Mn (5.591 d half life) could be determined.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The meteorite fall near Boumdeid, Mauritania, from September 14, 2011
Autorzy:
Buhl, S.
Toueirjenne, C.
Hofmann, B.
Laubenstein, M.
Wimmer, K.
Tematy:
Boumdeid (2011)
meteorite fall
Mauritania
trajectory scenario
L6 chondrite
cosmogenic radionuclides
Pokaż więcej
Wydawca:
Polskie Towarzystwo Meteorytowe
Powiązania:
https://bibliotekanauki.pl/articles/411504.pdf  Link otwiera się w nowym oknie
Opis:
On the evening of September 14, 2011 at 21:00 GMT a bright bolide was observed by hundreds of eyewitnesses in the area north and west of the town of Kiffa, in the department of Assaba, in south Mauritania. A terminal fragmentation and sound phenomena were observed near the end point of the trajectory. At least one mass of 3.5 kg was observed to impact and recovered the morning after the fall near Boumdeid (or Bou Mdeid), around 60 km north of Kiffa. Subsequently a large number of eyewitness accounts were recorded and mapped by GPS. The present paper provides a scenario for the trajectory of the Boumdeid (2011) meteorite based on the available parameters and wind data at the relevant altitudes. In addition the paper presents the results of the mineralogical and chemical analysis of the recovered meteorite which is consistent with a classification as ordinary chondrite of type L6, shock stage S2, and a weathering grade of W0. Following its analysis and classification, the meteorite was published under the official name Boumdeid (2011) in Meteoritical Bulletin, no. 100, MAPS 49(8), (2014). Gamma ray spectroscopy was conducted 84 days after the fall and the detection of short-lived radionuclides such as 56Co and 46Sc confirmed the recency of the event. Derived from the data of 60Co, 54Mn and 22Na the approximate preatmospheric radius of the meteorite body was 10–20cm. The report is also intended to serve as a case example for post-event data recovery and trajectory reconstruction in areas not covered by sky-camera networks and with limited scientific infrastructure.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Production and validation of scintillating structural components from low-background Poly(ethylene naphthalate)
Autorzy:
Radford, D.
Rumyantseva, N.
French, A. D.
Hackett, B.
Krause, P.
Hodák, R.
Efremenko, Y.
Guitart Corominas, M.
Rukhadze, E.
Schwarz, M.
Hobbs, K. P.
Hayward, C.
Laubenstein, M.
Hoppe, E. W.
Febbraro, M.
Manzanillas, L.
Stommel, M.
Schilling, I.
Pohl, M.
Gusev, K.
Weingarten, J.
Schoenert, S.
diVacri, M. L.
Fischer, F.
Schulz, O.
Muenstermann, D.
Štekl, I.
Majorovits, B.
Arnquist, I. J.
Zuzel, Grzegorz
Rouhana, R.
Opis:
Poly Ethylene Naphthalate (PEN) is an industrial polymer plastic which is investigated as a low background, transparent, scintillating and wavelength shifting structural material. PEN scintillates in the blue region and has excellent mechanical properties both at room and cryogenic temperatures. Thus, it is an ideal candidate for active structural components in experiments for the search of rare events like neutrinoless double-beta decay or dark matter recoils. Such optically active structures improve the identification and rejection efficiency of backgrounds events, like this improving the sensitivity of experiments. This paper reports on the production of radiopure and transparent PEN plates These structures can be used to mount germanium detectors operating in cryogenic liquids (LAr, LN). Thus, as first application PEN holders will be used to mount the Ge detectors in the Legend-200 experiment. The whole process from cleaning the raw material to testing the PEN active components under final operational conditions is reported.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
The study of neutrinos and antineutrinos from astrophysical sources by Borexino
Autorzy:
Ghiano, C.
Gromov, M.
Ianni, Aldo
Laubenstein, M.
Semenov, D.
von Feilitzsch, F.
Muratova, V.
Pallavicini, M.
Di Giacinto, A.
Penek, O.
Tartaglia, R.
Di Noto, L.
Guffanti, D.
Goretti, A.
Machulin, I.
Wójcik, Marcin
Chepurnov, A.
Sotnikov, A.
Pocar, A.
Raikov, G.
Biondi, R.
Kumaran, S.
Nugmanov, R.
Ding, X. F.
Pelicci, L.
Caminata, A.
Oberauer, L.
Skorokhvatov, M.
Drachnev, I.
Meroni, E.
D'Angelo, D.
Unzhakov, E.
Wurm, M.
Villante, F. L.
Bellini, G.
Di Ludovico, A.
Derbin, A.
Pilipenko, N.
Galbiati, C.
Vishneva, A.
Rossi, N.
Calaprice, F.
Di Marcello, V.
Ranalli, M. T.
Franco, D.
Martyn, J.
Smirnov, O.
Zuzel, Grzegorz
Jany, Anna
Razeto, A.
Miramonti, L.
Settanta, G.
Singhal, A.
Pietrofaccia, L.
Re, A.
Ortica, F.
Schönert, S.
Testera, G.
Zavatarelli, Sandra
Giammarchi, M.
Ludhova, L.
Ianni Andrea
Misiaszek, Marcin
Orekhov, V.
Ranucci, G.
Caccianiga, B.
Benziger, J.
Lomskaya, I.
Vogelaar, R. B.
Litvinovich, E.
Basilico, D.
Kobychev, V.
Korga, G.
Zuber, K.
Lombardi, P.
Opis:
The recent observation of CNO solar neutrinos by Borexino (BX) has proven the high potential offered by large underground ultrapure liquid scintillators to disclose weak neutrino and antineutrino fluxes. Supernovae explosions, gamma-ray bursts, solar flares and Gravitational Waves (GW) are among the possible extra-terrestrial sources of neutrinos and antineutrinos. The extreme radiopurity of the BX detector has already allowed to get the best upper limits on all flavor fluences in the few MeV energy range from gamma ray bursts, to set limits on the diffuse supernova antineutrino background in the unexplored energy region below 8 MeV and to get the strongest upper limits on fast radio bursts associated neutrino fluences up to 50 MeV. Recently, BX has searched for neutrino events in correlation with GW events from 2015 to 2020 using the BX data-set of the same periods. The strongest upper limits on GW-associated neutrino and antineutrino fluences have been obtained in the (0.5 - 5.0) MeV neutrino energy range.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Inne
Tytuł:
Final results of Borexino on CNO solar neutrinos
Autorzy:
Gromov, M.
Pallavicini, M.
Zavatarelli, S.
Vogelaar, R. B.
Ranucci, G.
Jany, Anna
Miramonti, L.
Lomskaya, I.
Franco, D.
Re, A.
Wurm, M.
Drachnev, I.
Pilipenko, N.
Ianni, Andrea
Bellini, G.
Pelicci, L.
Meroni, E.
Penek, Ö.
Unzhakov, E.
Tartaglia, R.
Goretti, A.
Kobychev, V.
Ludhova, L.
Basilico, D.
Caminata, A.
Nugmanov, R.
Orekhov, V.
Laubenstein, M.
Smirnov, O.
Caccianiga, B.
Oberauer, L.
Lombardi, P.
Testera, G.
Raikov, G.
Calaprice, F.
Sotnikov, A.
Martyn, J.
Ranalli, M. T.
Pietrofaccia, L.
Di Noto, L.
Machulin, I.
Korga, G.
Di Ludovico, A.
Guffanti, D.
Villante, F. L.
Biondi, R.
Semenov, D.
Settanta, G.
Chepurnov, A.
Ding, X. F.
Ianni, Aldo
Giammarchi, M.
Benziger, J.
Vishneva, A.
Ortica, F.
Ghiano, C.
Rossi, N.
Di Giacinto, A.
Schönert, S.
Singhal, A.
Pocar, A.
D’Angelo, D.
Derbin, A.
Misiaszek, Marcin
Muratova, V.
Razeto, A.
Di Marcello, V.
Galbiati, C.
Skorokhvatov, M.
Kumaran, S.
von Feilitzsch, F.
Zuber, K.
Zuzel, Grzegorz
Wójcik, Marcin
Litvinovich, E.
Opis:
In this paper, we report the first measurement of CNO solar neutrinos by Borexino that uses the correlated integrated directionality (CID) method, exploiting the subdominant Cherenkov light in the liquid scintillator detector. The directional information of the solar origin of the neutrinos is preserved by the early Cherenkov photons from the neutrino scattered electrons and is used to discriminate between signal and background. The directional information is independent from the spectral information on which the previous CNO solar neutrino measurements by Borexino were based, except for the selection of the energy region of interest. While the CNO spectral analysis could only be applied on the Phase-III dataset, the directional analysis can use the complete Borexino data taking period from 2007 to 2021. The absence of CNO neutrinos has been rejected with $> 5\sigma$ posterior probability using the Bayesian statistics. The directional CNO measurement is obtained without an external constraint on the $^{210}$Bi contamination of the liquid scintillator, which was applied in the spectral analysis approach. The final and the most precise CNO measurement of Borexino is then obtained by combining the new CID-based CNO result with an improved spectral fit of the Phase-III dataset. Including the statistical and the systematic errors, the extracted CNO interaction rate is $R(CNO) = 6.7^{+1.2}_{-0.8}$ cpd/100 tonnes. Taking into account the neutrino flavor conversion, the resulting CNO neutrino flux at Earth is $\Phi_{CNO} = 6.7^{+1.2}_{-0.8} \times 10^{8} cm^{-2}s^{-1}$, which is found to be in agreement with the high metallicity standard solar models. This outcome, combined with the $^{7}$Be and $^{8}$B fluxes measurements previously obtained by Borexino, can be used to disfavor the low metallicity SSM B16-AGSS09met model at 3.2$\sigma$ CL, assuming the SSM B16-GS98 high metallicity model to be true. Also, the sum of C and N abundances in the solar core with respect to the H abundance is evaluated with improved precision, resulting in $N_{CN} = 5.81^{+1.22}_{-0.94} \times 10^{-4}$, which is compatible with the high metallicity scenario and exhibits a 2$\sigma$ tension with the low metallicity case. The results described in this work reinforce the role of directional Cherenkov light in large-scale liquid scintillator detectors and open up new avenues for the next-generation liquid scintillator or hybrid neutrino experiments. A particular relevance is expected for the latter detectors, which aim to combine the advantages from both Cherenkov-based and scintillation-based detection techniques.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Optimized $\alpha / \beta$ pulse shape discrimination in Borexino
Autorzy:
Gromov, M.
Pallavicini, M.
Zavatarelli, S.
Vogelaar, R. B.
Ranucci, G.
Jany, Anna
Miramonti, L.
Lomskaya, I.
Franco, D.
Re, A.
Wurm, M.
Drachnev, I.
Pilipenko, N.
Ianni, Andrea
Bellini, G.
Pelicci, L.
Meroni, E.
Penek, Ö.
Unzhakov, E.
Tartaglia, R.
Goretti, A.
Kobychev, V.
Ludhova, L.
Basilico, D.
Caminata, A.
Nugmanov, R.
Orekhov, V.
Laubenstein, M.
Smirnov, O.
Caccianiga, B.
Oberauer, L.
Lombardi, P.
Testera, G.
Raikov, G.
Calaprice, F.
Sotnikov, A.
Martyn, J.
Ranalli, M. T.
Pietrofaccia, L.
Di Noto, L.
Machulin, I.
Korga, G.
Di Ludovico, A.
Guffanti, D.
Biondi, R.
Semenov, D.
Settanta, G.
Chepurnov, A.
Ding, X. F.
Ianni, Aldo
Giammarchi, M.
Benziger, J.
Vishneva, A.
Ortica, F.
Ghiano, C.
Rossi, N.
Di Giacinto, A.
Schönert, S.
Singhal, A.
Pocar, A.
D’Angelo, D.
Derbin, A.
Misiaszek, Marcin
Muratova, V.
Razeto, A.
Di Marcello, V.
Galbiati, C.
Skorokhvatov, M.
Kumaran, S.
von Feilitzsch, F.
Zuber, K.
Zuzel, Grzegorz
Wójcik, Marcin
Litvinovich, E.
Opis:
Borexino could efficiently distinguish between α and β radiation in its liquid scintillator by the characteristic time profile of its scintillation pulse. This α/β discrimination, first demonstrated on the ton scale in the counting test facility prototype, was used throughout the lifetime of the experiment between 2007 and 2021. With this method, the α events are identified and subtracted from the solar neutrino events similar to β. This is particularly important in liquid scintillators, as the α scintillation is strongly quenched. In Borexino, the prominent $^{210}$Po decay peak was a background in the energy range of electrons scattered from $^{7}$Be solar neutrinos. Optimal α/β discrimination was achieved with a multilayer perceptron neural network, with a higher ability to leverage the timing information of the scintillation photons detected by the photomultiplier tubes. An event-by-event, high efficiency, stable, and uniform pulse shape discrimination was essential in characterizing the spatial distribution of background in the detector. This benefited most Borexino measurements, including solar neutrinos in the pp chain and the first direct observation of the CNO cycle in the Sun. This paper presents key milestones in α/β discrimination in Borexino as a term of comparison for current and future large liquid scintillator detectors.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Search for high energy 5.5 MeV solar axions with the complete Borexino dataset
Autorzy:
Settanta, G.
Testera, G.
D’Angelo, D.
Zavatarelli, S.
Jany, Anna
Pocar, A.
Di Noto, L.
Ranalli, M. T.
Martyn, J.
Caminata, A.
Caccianiga, B.
Kumaran, S.
Orekhov, V.
Pilipenko, N.
Pallavicini, M.
Singhal, A.
Di Marcello, V.
Pelicci, L.
Ranucci, G.
Ortica, F.
Machulin, I.
Chepurnov, A.
Ding, X. F.
Misiaszek, Marcin
Pietrofaccia, L.
Skorokhvatov, M.
Rossi, N.
Kobychev, V.
Bellini, G.
Re, A.
Vishneva, A.
Zuzel, Grzegorz
Biondi, R.
Miramonti, L.
Sotnikov, A.
Calaprice, F.
Giammarchi, M.
von Feilitzsch, F.
Ghiano, C.
Di Ludovico, A.
Guffanti, D.
Ludhova, L.
Oberauer, L.
Schönert, S.
Benziger, J.
Derbin, A.
Drachnev, I.
Basilico, D.
Razeto, A.
Vogelaar, R. B.
Zuber, K.
Di Giacinto, A.
Galbiati, C.
Meroni, E.
Litvinovich, E.
Penek, Ö.
Lombardi, P.
Wurm, M.
Unzhakov, E.
Goretti, A.
Ianni, Andrea
Muratova, V.
Semenov, D.
Ianni, Aldo
Wójcik, Marcin
Tartaglia, R.
Lomskaya, I.
Smirnov, O.
Raikov, G.
Franco, D.
Nugmanov, R.
Gromov, M.
Korga, G.
Laubenstein, M.
Opis:
A search for solar axions and axion-like particles produced in the $p + d \to ^{3}He + A$ (5.5 MeV) reaction was performed using the complete dataset of the Borexino detector (3995 days of measurement live-time). The following interaction processes have been considered: axion decay into two photons ($A \to 2\gamma$), inverse Primakoff conversion on nuclei ($A + Z \to \gamma + Z$), the Compton conversion of axions to photons ($A + e \to e + \gamma$) and the axio-electric effect ($A + e + Z \to e + Z$). Model-independent limits on product of axion–photon ($g_{A\gamma}$), axion–electron ($g_{Ae}$), and isovector axion–nucleon ($g_{3AN}$) couplings are obtained: $\left | g_{A\gamma} \times g_{3AN} \right | \leq 2.3 \times 10^{-11} GeV^{-1}$ and $\left | g_{Ae} \times g_{3AN} \right | \leq 1.9 \times 10^{-13}$ at $m_{A} < 1 MeV$ (90% c.l.). The Borexino results exclude new large regions of $g_{A\gamma}$, and $g_{Ae}$ coupling constants and axion masses $m_{A}$, and leads to constraints on the products $\left | g_{A\gamma} \times m_{A} \right |$ and $\left | g_{Ae} \times m_{A} \right |$ for the KSVZ- and the DFSZ-axion models.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
SOX : short distance neutrino Oscillations with BoreXino
Autorzy:
Miramonti, L.
Franco, D.
Cavalcante, P.
Ianni, Andrea
Unzhakov, E.
Bick, D.
Mosteiro, P.
Goretti, A.
Lombardi, P.
Otis, K.
Sotnikov, A.
Link, J. M.
Korga, G.
Salvo, C.
Suvorov, Y.
Perasso, S.
Chavarria, A.
Hungerford, E.
Fernandes, G.
Misiaszek, Marcin
Razeto, A.
Sukhotin, S.
Manecki, S.
Pallavicini, M.
Wurm, M.
Bellini, G.
Romani, A.
Korablev, D.
Kobychev, V.
Kryn, D.
Meyer, M.
Wang, H.
Semenov, D.
Ortica, F.
Hagner, C.
Skorokhvatov, M.
Zuzel, Grzegorz
Bravo, D.
Simgen, H.
Ranucci, G.
Re, A.
Davini, S.
Tartaglia, R.
Caminata, A.
Caccianiga, B.
Oberauer, L.
Vogelaar, R. B.
Etenko, A.
Chepurnov, A.
Ghiano, C.
Schönert, S.
Pocar, A.
Papp, L.
Saldanha, R.
Testera, G.
Zavatarelli, S.
Lombardi, F.
Lukyanchenko, G.
Meroni, E.
Ludhova, L.
Bonfini, G.
Laubenstein, M.
Göger-Neff, M.
Smirnov, O.
Obolensky, M.
Calaprice, F.
Pantic, E.
Krasnicky, D.
Machulin, I.
Zaimidoroga, O.
Ianni, Aldo
Fomenko, K.
Rossi, N.
D’Angelo, D.
Derbin, A.
Muratova, V.
Galbiati, C.
Maneschg, W.
Wójcik, Marcin
Litvinovich, E.
Opis:
The very low radioactive background of the Borexino detector, its large size, and the well proved capability to detect both low energy electron neutrinos and antineutrinos make an ideal case for the study of short distance neutrino oscillations with artificial sources at Gran Sasso. This paper describes the possible layouts of $^{51}Cr(v_{e})$ and $^{144}Ce-^{144}Pr(\bar{v}_{e})$ source experiments in Borexino and shows the expected sensitivity to eV mass sterile neutrinos for three possible different phases of the experiment. Expected results on neutrino magnetic moment, electroweak mixing angle, and couplings to axial and vector currents are shown too.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Wyświetlanie 1-10 z 128

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