TY  - JOUR
AU  - Guadilla, V. et al
AU  - Tain, J. L.
AU  - Algora, A.
AU  - Agramunt, J.
AU  - Jordan, D.
AU  - Monserrate, M.
AU  - Montaner-Piza, A.
AU  - Orrigo, S. E. A.
AU  - Rubio, B.
AU  - Valencia, E.
PY  - 2020
DA  - 2020//
TI  - Determination of beta-decay ground state feeding of nuclei of importance for reactor applications
T2  - Phys. Rev. C
JO  - Physical Review C
SP  - 064304
EP  - 12pp
VL  - 102
IS  - 6
PB  - Amer Physical Soc
AB  - In beta-decay studies the determination of the decay probability to the ground state (g.s.) of the daughter nucleus often suffers from large systematic errors. The difficulty of the measurement is related to the absence of associated delayed gamma-ray emission. In this work we revisit the 4 pi gamma – beta method proposed by Greenwood and collaborators in the 1990s, which has the potential to overcome some of the experimental difficulties. Our interest is driven by the need to determine accurately the beta-intensity distributions of fission products that contribute significantly to the reactor decay heat and to the antineutrinos emitted by reactors. A number of such decays have large g.s. branches. The method is relevant for nuclear structure studies as well. Pertinent formulas are revised and extended to the special case of beta-delayed neutron emitters, and the robustness of the method is demonstrated with synthetic data. We apply it to a number of measured decays that serve as test cases and discuss the features of the method. Finally, we obtain g.s. feeding intensities with reduced uncertainty for four relevant decays that will allow future improvements in antineutrino spectrum and decay heat calculations using the summation method.
SN  - 2469-9985
UR  - https://arxiv.org/abs/2005.08780
UR  - https://doi.org/10.1103/PhysRevC.102.064304
DO  - 10.1103/PhysRevC.102.064304
LA  - English
N1  - WOS:000595153500001
ID  - Guadilla_etal2020
ER  -