RT Journal Article
T1 Large Impact of the Decay of Niobium Isomers on the Reactor (v)over-bar(e) Summation Calculations
A1 Fraile Prieto, Luis Mario
A1 Vedia Fernández, María Victoria
AB Even mass neutron-rich niobium isotopes are among the principal contributors to the reactor antineutrino energy spectrum. They are also among the most challenging to measure due to the refractory nature of niobium, and because they exhibit isomeric states lying very close in energy. The beta-intensity distributions of Nb-100gs,Nb-100m and Nb-102gs,Nb-02m beta decays have been determined using the total absorption.-ray spectroscopy technique. The measurements were performed at the upgraded Ion Guide Isotope Separator On-Line facility at the University of Jyvaskyla. Here, the double Penning trap system JYFLTRAP was employed to disentangle the beta decay of the isomeric states. The new data obtained in this challenging measurement have a large impact in antineutrino summation calculations. For the first time the discrepancy between the summation model and the reactor antineutrino measurements in the region of the shape distortion has been reduced.
PB American Physical Society
SN 0031-9007
YR 2019
FD 2019-01-30
LK https://hdl.handle.net/20.500.14352/13262
UL https://hdl.handle.net/20.500.14352/13262
LA eng
NO © 2019 American Physical Society. Artículo firmado por 44 autores. This work has been supported by the Spanish Ministerio de Economía y Competitividad under Grants No. FPA2011-24553, No. AIC-A-2011-0696, No. FPA2014-52823-C2-1P, No. FPA2015-65035-P, No. FPI/BES-2014-068222, and the program Severo Ochoa (SEV-2014-0398), by the Spanish Ministerio de Educación under the FPU12/01527 Grant, by the European Commission under the FP7/EURATOM Contract No. 605203 and the FP7/ENSAR Contract No. 262010, and by the Junta para la Ampliación de Estudios Programme (CSIC JAE-Doc contract) co-financed by ESF. V. G. thanks the support of K. Zygmunt. This work was supported by the Academy of Finland under the Finnish Centre of Excellence Programme (Project No. 213503, Nuclear and Accelerator-Based Physics Research at JYFL). It was also supported by the UK Science and Technology Facilities Council (STFC) Grant No. ST/F012012/1.
NO Unión Europea. FP7
NO Ministerio de Economía y Competitividad (MINECO)
NO Centro de Excelencia Severo Ochoa
NO Ministerio de Educación Cultura y Deporte
NO Junta para la Ampliación de Estudios Programme (CSIC JAE-Doc contract) - ESF
NO Academy of Finland under the Finnish Centre of Excellence Programme
NO UK Science and Technology Facilities Council (STFC)
DS Docta Complutense
RD 23 ene 2026