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SUMMARY:Calculation of the neutrino-nuclear reaction cross-sections for 
 𝑮𝒆𝟕𝟔 nuclei and estimation of the solar neutrino background in
  the GERDA/LEGEND experiments.
DTSTART;VALUE=DATE-TIME:20200228T074000Z
DTEND;VALUE=DATE-TIME:20200228T080000Z
DTSTAMP;VALUE=DATE-TIME:20260411T020011Z
UID:indico-contribution-1555@indico.tlabs.ac.za
DESCRIPTION:Speakers: Andrei Vyborov (Moscow Institute of Physics and Tech
 nology)\nThe work presents calculations of the neutrino-nuclear reaction c
 ross-sections using the\nexample of the nucleus 𝐺𝑒'( (𝐺𝑒'( 
 𝜈*\, 𝑒 𝐴𝑠'( ). In the structure of the nucleus\, not only\ndis
 crete\, but also continuous states formed due to the collective interactio
 n of nucleons were\ndistinguished. In particular\, the contribution of the
  Giant Gamow-Teller resonance and so-called\npygmy resonances in the captu
 re rate of solar neutrinos was estimated (an increase of 25% to\n50%\, dep
 ending on the quenching parameter used).\nBased on the obtained capture ra
 te\, a Monte Carlo simulation of the subsequent beta\ndecay of the nucleus
  𝐴𝑠'( (𝐴𝑠'( → 𝑆𝑒'( + 𝑒2 + 𝜈* + 𝑛𝛾) was car
 ried out for germanium\ndetectors in the GERDA experiment. Thus\, the cont
 ribution of the background component due\nto solar neutrinos was estimated
 \, which\, due to the small cross-sections of neutrino-nuclear\nreactions\
 , is practically unremovable\, imposing confines on the sensitivity limit 
 of the setup.\nA similar assessment can be made for the upcoming LEGEND ex
 periment taking into\naccount its geometry. Preliminary results suggest th
 at BI of solar neutrinos are 1-2 orders of\nmagnitude lower than the predi
 cted accuracy of the LEGEND experiment.\n\nhttps://indico.tlabs.ac.za/even
 t/85/contributions/1555/
LOCATION:Main Venue
URL:https://indico.tlabs.ac.za/event/85/contributions/1555/
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