6533b854fe1ef96bd12afbe2
RESEARCH PRODUCT
Total Absorption Spectroscopy Study ofRb92Decay: A Major Contributor to Reactor Antineutrino Spectrum Shape
Tommi EronenPasi KarvonenMuriel FallotT. MartinezV. GorlychevT. ShibaV.-v. ElomaaE. MendozaP. H. ReganP. H. ReganS. CormonM. ReponenR. Caballero-folchJuha ÄYstöJuho RissanenA. A. SonzogniA. B. Perez-cerdanE. ValenciaM. D. JordanChristoph WeberChristoph WeberM. B. Gómez-hornillosA. CucoanesIain MooreF. G. KondevAnu KankainenA.-a. Zakari-issoufouAlejandro AlgoraAlejandro AlgoraVeli KolhinenM. EstienneM. BowryD. Cano-ottF. MolinaJ. AgramuntHeikki PenttiläV. M. BuiJ. L. TainE. EstevezB. RubioStephen RiceA. R. GarcíaJani HakalaG. F. FarrellyZs. PodolyákJ. A. BrizW. GelletlyW. GelletlyAri JokinenAmanda Portasubject
Semileptonic decayPhysicsTotal absorption spectroscopyFissionGeneral Physics and Astronomychemistry.chemical_elementBeta decaySpectral lineRubidiumNuclear physicschemistryDouble beta decayAtomic physicsAbsorption (electromagnetic radiation)description
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. (92)Rb 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 (92)Rb 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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-09-04 | Physical Review Letters |