6533b7d9fe1ef96bd126c5cd
RESEARCH PRODUCT
Large Impact of the Decay of Niobium Isomers on the Reactor ¯νe Summation Calculations
V. GuadillaA. AlgoraJ. L. TainM. EstienneM. FallotA. A. SonzogniJ. AgramuntJuha ÄYstöJ. A. BrizA. CucoanesTommi EronenL. M. FraileE. GanioğluW. GelletlyDmitry GorelovJani HakalaAri JokinenD. JordanAnu KankainenVeli KolhinenJukka KoponenM. LeboisL. Le MeurT. MartinezM. MonserrateA. Montaner-pizáIain MooreE. NácherS. E. A. OrrigoHeikki PenttiläIlkka PohjalainenA. PortaJuuso ReinikainenMikael ReponenSami Rinta-antilaB. RubioKari RytkönenT. ShibaVolker SonnenscheinE. ValenciaV. VediaAnnika VossJ. N. WilsonA.-a. Zakari-issoufousubject
neutriinotbeta decayNuclear Experimentydinfysiikkadescription
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 β-intensity distributions of 100gs;100mNb and 102gs;102mNb β decays have been determined using the total absorption γ-ray spectroscopy technique. The measurements were performed at the upgraded Ion Guide Isotope Separator On-Line facility at the University of Jyväskylä. Here, the double Penning trap system JYFLTRAP was employed to disentangle the β 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. peerReviewed
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-01-01 |