Large Impact of the Decay of Niobium Isomers on the Reactor ${\overline{{u}}}_{e}$ Summation Calculations

V. Guadilla; A. Algora; J.L. Tain; Magali Estienne; Muriel Fallot; A.A. Sonzogni; J. Agramunt; J. Äystö; J.A. Briz; A. Cucoanes; T. Eronen; L.M. Fraile; E. Ganioğlu; W. Gelletly; D. Gorelov; J. Hakala; A. Jokinen; D. Jordan; A. Kankainen; V. Kolhinen; J. Koponen; M. Lebois; L. Le Meur; T. Martinez; M. Monserrate; A. Montaner-Pizá; I. Moore; E. Nácher; S.E.A. Orrigo; H. Penttilä; I. Pohjalainen; Amanda Porta; J. Reinikainen; M. Reponen; S. Rinta-Antila; B. Rubio; K. Rytkönen; T. Shiba; V. Sonnenschein; E. Valencia; V. Vedia; A. Voss; J.N. Wilson; A.A. Zakari-Issoufou

doi:10.1103/PhysRevLett.122.042502

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$Large Impact of the Decay of Niobium Isomers on the Reactor ${\overline{{u}}}_{e}$ Summation Calculations$

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Large Impact of the Decay of Niobium Isomers on the Reactor ${\overline{{u}}}_{e}$ Summation Calculations

V. Guadilla, A. Algora, J.L. Tain, Magali Estienne, Muriel Fallot, A.A. Sonzogni, J. Agramunt, J. Äystö, J.A. Briz, A. Cucoanes, …

Physical review letters, Vol.122(4)

2019

DOI: https://doi.org/10.1103/PhysRevLett.122.042502

Abstract

Nuclear Experiment

Physics

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 Nb100gs,100m and Nb102gs,102m 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.

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Title: Large Impact of the Decay of Niobium Isomers on the Reactor ${\overline{{u}}}_{e}$ Summation Calculations
Creators: V. Guadilla - Universitat de València
A. Algora - Universitat de València
J.L. Tain
Magali Estienne - Laboratoire de Physique Subatomique et des Technologies Associées
Muriel Fallot - Laboratoire de Physique Subatomique et des Technologies Associées
A.A. Sonzogni - Brookhaven National Laboratory
J. Agramunt - Instituto de Física Corpuscular
J. Äystö - University of Jyväskylä
J.A. Briz - Laboratoire de Physique Subatomique et des Technologies Associées
A. Cucoanes - Laboratoire de Physique Subatomique et des Technologies Associées
T. Eronen - University of Jyväskylä
L.M. Fraile - Universidad Complutense de Madrid
E. Ganioğlu - Istanbul University
W. Gelletly - University of Surrey
D. Gorelov - University of Jyväskylä
J. Hakala - University of Jyväskylä
A. Jokinen - University of Jyväskylä
D. Jordan - Universitat de València
A. Kankainen - University of Jyväskylä
V. Kolhinen - University of Jyväskylä
J. Koponen - University of Jyväskylä
M. Lebois - Institut de Physique
L. Le Meur - Laboratoire de Physique Subatomique et des Technologies Associées
T. Martinez - Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas
M. Monserrate - Universitat de València
A. Montaner-Pizá - Universitat de València
I. Moore - University of Jyväskylä
E. Nácher - Universitat de València
S.E.A. Orrigo - Universitat de València
H. Penttilä - University of Jyväskylä
I. Pohjalainen - University of Jyväskylä
Amanda Porta - Laboratoire de Physique Subatomique et des Technologies Associées
J. Reinikainen - University of Jyväskylä
M. Reponen - University of Jyväskylä
S. Rinta-Antila
B. Rubio - Universitat de València
K. Rytkönen - University of Jyväskylä
T. Shiba - Laboratoire de Physique Subatomique et des Technologies Associées
V. Sonnenschein - University of Jyväskylä
E. Valencia - Universitat de València
V. Vedia - Universidad Complutense de Madrid
A. Voss - University of Jyväskylä
J.N. Wilson - Institut de Physique
A.A. Zakari-Issoufou - Laboratoire de Physique Subatomique et des Technologies Associées
Publication Details: Physical review letters, Vol.122(4)
Publisher: American Physical Society
Date published: 2019
Identifiers: 99929059102346
Academic Unit: School of Maths and Physics
Language: English
Resource Type: Journal article

Large Impact of the Decay of Niobium Isomers on the Reactor ${\overline{{u}}}_{e}$ Summation Calculations

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