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arXiv · 1912.05334

Calculated solar-neutrino capture rate for a radiochemical 205 Tl-based solar-neutrino detector

Joel Kostensalo·Jouni Suhonen·Kai Zuber
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Abstract

Radiochemical experiments for low-energy solar-neutrino detection have been making headlines by exploiting the isotopes \iso{Cl}{37} and \iso{Ga}{71}. Such a very low-threshold measurement of this type can also be performed using \iso{Tl}{205}, which has been considered for decades for this purpose. A unique feature of this detector nucleus is the integration is the solar-neutrino flux over millions of years owing to its long-living daughter \iso{Pb}{205}. In this study we have calculated for the first time the cross section for the charged-current solar-neutrino scattering off \iso{Tl}{205}. Taking into account the solar-model-predicted neutrino fluxes and the electron-neutrino survival probabilities, a solar-neutrino capture rate of 62.2 $\pm 8.6$ SNU is determined, a value significantly smaller than in previous estimates.

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Joel Kostensalo, Jouni Suhonen, Kai Zuber. 2019-12-11. Calculated solar-neutrino capture rate for a radiochemical 205 Tl-based solar-neutrino detector. https://doi.org/10.1103/physrevc.101.031302

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