U and Th content in the Central Apennines continental crust: A contribution to the determination of the geo-neutrinos flux at LNGS

Coltorti, Massimo; Boraso, R.; Mantovani, Fabio; Morsilli, Michele; Fiorentini, G.; Riva, A.; Rusciadelli, Giovanni; Tassinari, Renzo; Tomei, C.; Carlo, G. Di; Chubakov, Viacheslav

doi:10.1016/j.gca.2011.01.024

Cited by 49 publications

(56 citation statements)

References 83 publications

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“…Since a significant contribution to the expected geoneutrino signal comes from U and Th in the continental crust surrounding the site, we follow past approaches to study the local contribution (Coltorti et al 2011;Fiorentini et al 2012;Huang et al 2013;Huang et al 2014), with a particular interest in focusing on the closest 6°× 4°grid surrounding the detector. We define this latter region as the local crust (LOC) (Figure 1).…”

Section: Introductionmentioning

confidence: 99%

Expected geoneutrino signal at JUNO

Strati

Baldoncini

Callegari

et al. 2015

Prog. in Earth and Planet. Sci.

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Constraints on the Earth's composition and on its radiogenic energy budget come from the detection of geoneutrinos. The Kamioka Liquid scintillator Antineutrino Detector (KamLAND) and Borexino experiments recently reported the geoneutrino flux, which reflects the amount and distribution of U and Th inside the Earth. The Jiangmen Underground Neutrino Observatory (JUNO) neutrino experiment, designed as a 20 kton liquid scintillator detector, will be built in an underground laboratory in South China about 53 km from the Yangjiang and Taishan nuclear power plants, each one having a planned thermal power of approximately 18 GW. Given the large detector mass and the intense reactor antineutrino flux, JUNO aims not only to collect high statistics antineutrino signals from reactors but also to address the challenge of discriminating the geoneutrino signal from the reactor background. The predicted geoneutrino signal at JUNO is 39:7 þ6:5 −5:2 terrestrial neutrino unit (TNU), based on the existing reference Earth model, with the dominant source of uncertainty coming from the modeling of the compositional variability in the local upper crust that surrounds (out to approximately 500 km) the detector. A special focus is dedicated to the 6°× 4°local crust surrounding the detector which is estimated to contribute for the 44% of the signal. On the basis of a worldwide reference model for reactor antineutrinos, the ratio between reactor antineutrino and geoneutrino signals in the geoneutrino energy window is estimated to be 0.7 considering reactors operating in year 2013 and reaches a value of 8.9 by adding the contribution of the future nuclear power plants. In order to extract useful information about the mantle's composition, a refinement of the abundance and distribution of U and Th in the local crust is required, with particular attention to the geochemical characterization of the accessible upper crust where 47% of the expected geoneutrino signal originates and this region contributes the major source of uncertainty.

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Section: Introductionmentioning

confidence: 99%

Expected geoneutrino signal at JUNO

Strati

Baldoncini

Callegari

et al. 2015

Prog. in Earth and Planet. Sci.

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“…The careful evaluation of the contribution of the local crust (LOC) to the total geo-neutrino signal, based on the local 3D geology around the LNGS laboratory, has been reported in Coltorti et al [2011] as S geo (LOC) = (9.7 ± 1.3) TNU. On the other hand, the contribution from the rest of the crust (ROC), based on the recent calculation by Huang et al [2013], results in the estimate of the geo-neutrino signal from the crust (LOC+ROC) equal to S geo (Crust) = (23.4 ± 2.8) TNU.…”

Section: Geological Implicationsmentioning

confidence: 99%

Borexino: geo-neutrino measurement at Gran Sasso, Italy

Agostini¹,

Altenmueller²,

Appel³

et al. 2017

Annals of Geophysics

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“…In particular, the crustal contribution to the geoneutrino signal can be inferred from direct geochemical and geophysical surveys, see e.g. [14,29], while the mantle contribution is totally model-dependent. Hence from the experimental determination of geoneutrinos signal, by subtracting the crustal contribution, one can derive the the mantle contribution in an independent way.…”

Section: Pos(neutel2015)014mentioning

confidence: 99%

“…Hence from the experimental determination of geoneutrinos signal, by subtracting the crustal contribution, one can derive the the mantle contribution in an independent way. In Bellini et al 2013 [27], from Borexino data a mantle geoneutrino signal of S(Mantle)=15.4 ±12.3 TN has been extracted, by considering the geoneutrino signal from the crust S(Crust) = (23.4 ± 2.8) TNU, this last obtained by combining the study of the Local Crust in the region around the Gran Sasso laboratory of [29] together with the calculation of the contribution from the Rest Of the Crust of [14]. Furthermore, the Borexino and KamLAND results have been combined, by assuming a homogeneous mantle and thus the same signal from the mantle geoneutrinos on the Earth surface, resulting into S(Mantle)=14.1 ± 8.1 TNU.…”

Section: Pos(neutel2015)014mentioning

confidence: 99%

Neutrinos from the Earth: Status and Perspectives

Ricci¹

2016

Proceedings of XVI International Workshop on Neutrino Telescopes — PoS(NEUTEL2015)

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Constraints on the Earth's composition and on its radiogenic energy budget come from the detection of geoneutrinos, i.e. electron antineutrinos produced in beta decays along the the decay chains of 238 U and 232 Th existing in the interior of our planet. The KamLAND and Borexino experiments recently reported the geoneutrino flux and other experiments are starting or planning in different countries of the world. We report here the main available results and the future perspectives about these special probes of the Earth's interior. Since reactor antineutrinos represent the main source of background in geoneutrinos detection, we also report updated evaluation of reactor antineutrino signals for the different experimental sites in the world, taking into account the most recent reactors operational data.

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U and Th content in the Central Apennines continental crust: A contribution to the determination of the geo-neutrinos flux at LNGS

Cited by 49 publications

References 83 publications

Expected geoneutrino signal at JUNO

Expected geoneutrino signal at JUNO

Borexino: geo-neutrino measurement at Gran Sasso, Italy

Neutrinos from the Earth: Status and Perspectives

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