PT Journal
AU IGISOL Collaboration (Zakari-Issoufou, AAea
   Algora, A
   Tain, JL
   Valencia, E
   Agramunt, J
   Estevez, E
   Gelletly, W
   Jordan, MD
   Molina, F
   Perez-Cerdan, AB
   Rubio, B
TI Total Absorption Spectroscopy Study of Rb-92 Decay: A Major Contributor to Reactor Antineutrino Spectrum Shape
SO Physical Review Letters
JI Phys. Rev. Lett.
PY 2015
BP 102503
EP 6pp
VL 115
IS 10
DI 10.1103/PhysRevLett.115.102503
LA English
AB The antineutrino spectra measured in recent experiments at reactors are inconsistent with calculations based on the conversion of integral beta spectra recorded at the ILL reactor. Rb-92 makes the dominant contribution to the reactor antineutrino spectrum in the 5-8 MeV range but its decay properties are in question. We have studied Rb-92 decay with total absorption spectroscopy. Previously unobserved beta feeding was seen in the 4.5-5.5 region and the GS to GS feeding was found to be 87.5(25)%. The impact on the reactor antineutrino spectra calculated with the summation method is shown and discussed.
ER