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SUMMARY:Detector calibration studies for the e-Shape experiment
DTSTART;VALUE=DATE-TIME:20260505T135000Z
DTEND;VALUE=DATE-TIME:20260505T143000Z
DTSTAMP;VALUE=DATE-TIME:20260514T132000Z
UID:indico-contribution-30535@indico.ific.uv.es
DESCRIPTION:Speakers: S.  Durand (Subatech)\nForbidden β decays are of pa
 rticular interest for both nuclear physics and astrophysics.\nIn the conte
 xt of the astrophysical r-process\, they govern the matter flow along neut
 ron-rich\nnuclei and strongly impact the final abundance distribution of h
 eavy elements. In nuclear\nreactors\, an incomplete description of forbidd
 en transitions has been identified as one of the\nleading hypotheses behin
 d the reactor antineutrino shape anomaly\, which complements the\nglobal r
 eactor antineutrino anomaly. Despite their importance\, forbidden β decay
 s remain\npoorly understood due to the complexity of their spectra and the
  challenges in modeling\ntheir shape factors.\nThis contribution focuses o
 n the detector calibration work carried out after the 2023\ne-Shape experi
 mental campaign at the IGISOL facility of Jyväskylä\, Finland. A detaile
 d\ndetector geometry has been implemented in Geant4 in order to reproduce 
 the experimental\nsetup as accurately as possible. Energy calibration has 
 been performed using several radioactive\nsources and nuclei\, together wi
 th a dedicated study of the detector energy resolution.\nThe resulting cal
 ibrated simulations are compared with experimental data in order to\nasses
 s the level of agreement between measurement and Monte Carlo spectra. A go
 od agreement\nhas already been obtained for the 114Ag beta decay energy sp
 ectrum\, providing a first\nvalidation of both the detector calibration an
 d the resolution convolution procedure. These\ndevelopments constitute an 
 essential step toward future precision analyses of forbidden β\nspectra a
 nd the extraction of reliable shape factors. Future efforts will focus on 
 the analysis\nof β spectra of selected nuclei in order to extract shape f
 actors\, and on the benchmarking of\nthese results against theoretical pre
 dictions. Ultimately\, this work will contribute to more reliable\nmodelin
 g of forbidden transitions\, with applications to both r-process nucleosyn
 thesis\nsimulations and reactor antineutrino spectrum predictions.\n\nhttp
 s://indico.ific.uv.es/event/8411/contributions/30535/
LOCATION:Universe Salón de Actos del Edificio de Cabecera (PCUV) 
URL:https://indico.ific.uv.es/event/8411/contributions/30535/
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