Total Absorption Spectroscopy Study of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>Rb</mml:mi></mml:mrow><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>92</mml:mn></mml:mrow></mml:mmultiscripts></mml:mrow></mml:math>Decay: A Major Contributor to Reactor Antineutrino Spectrum Shape

Zakari-Issoufou, A.-A.; Fallot, M.; Porta, A.; Algora, A.; Taín, J. L.; Valencia, E.; Rice, S.; Bui, V. M.; Cormon, S.; Estienne, M.; Agramunt, J.; Äystö, J.; Bowry, M.; Briz, J. A.; Caballero-Folch, R.; Cano‐Ott, D.; Cucoanes, A.; Elomaa, V.‐V.; Eronen, T.; Estévez, Emma; Farrelly, G. F.; García, A. R.; Gelletly, W.; Gómez-Hornillos, M.B.; Gorlychev, V.; Hakala, J.; Jokinen, A.; Jordan, M. D.; Kankainen, A.; Karvonen, P.; Kolhinen, V. S.; Kondev, F. G.; Martínez, T.; Mendoza, E.; Molina, F.; Moore, I. D.; Pérez-Cerdán, A. B.; Podolyák, Zs.; Penttilä, H.; Regan, P. H.; Reponen, M.; Rissanen, J.; Rubio, B.; Shiba, T.; Sonzogni, A. A.; Weber, C.

doi:10.1103/physrevlett.115.102503

Cited by 76 publications

(62 citation statements)

References 40 publications

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“…However in this case the shape of the observed spectrum [11][12][13][14] is in disagreement with the theoretical predictions. It is more difficult for sterile neutrinos to explain this spectral deformation, and so many authors have instead argued that it results from a fault in the calculations of the theoretical spectra [15,16]. Consistent with this interpretation of the deficit is recent evidence from Daya Bay that the contributions of the primary fission isotopes to the deficit are not proportional to their abundances [17].…”

Section: Motivationmentioning

confidence: 54%

Getting the most neutrinos out of IsoDAR

et al. 2017

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Several experimental collaborations worldwide intend to test sterile neutrino models by measuring the disappearance of antineutrinos produced via isotope decay at rest (IsoDAR). The most advanced of these proposals have very similar setups, in which a proton beam strikes a target yielding neutrons which are absorbed by a high isotopic purity 7 Li converter, yielding 8 Li whose resulting decay yields the antineutrinos. In this note, we use FLUKA and GEANT4 simulations to investigate three proposed modifications of this standard proposal. In the first, the 7 Li is replaced with 7 Li compounds including a deuterium moderator. In the second, a gap is placed between the target and the converter to reduce the neutron bounce-back. Finally, we consider cooling the converter with liquid nitrogen. We find that these modifications can increase the antineutrino yield by as much as 50%. The first also substantially reduces the quantity of high purity 7 Li which is needed.

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Section: Motivationmentioning

confidence: 54%

Getting the most neutrinos out of IsoDAR

et al. 2017

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“…The shaded bands represent the 1σ uncertainties in their contributions according to their tabulated uncertainties in fission yields and relative decay probabilities. Recent total absorption gamma spectroscopy measurements [28] suggest the 92 Rb contribution is at the high end of the rather large uncertainty shown here, further enhancing the prediction of a shoulder.…”

Section: Pos(neutel2015)023mentioning

confidence: 76%

“…On this topic, a body of nuclear structure measurements exist which have not yet been incorporated into the publicly-available nuclear databases [28,29,30,31]. Recent work to incorporate these measurements suggest corrections which both enhance and diminish the ν e spectrum above 6.5 MeV.…”

Section: Discussionmentioning

confidence: 99%

The Energy Spectrum of Reactor Antineutrinos

Dwyer¹

2016

Proceedings of XVI International Workshop on Neutrino Telescopes — PoS(NEUTEL2015)

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Measurements of electron antineutrinos emitted by nuclear reactors have been central to our understanding the nature of these particles. These successes have been clouded by disagreements between existing models and measurements of the rate and energy spectra of ν e from reactors. Direct calculation of energy spectra based on nuclear fission and decay databases, despite significant uncertainties, suggests a possible explanation for the observed spectral shape. Here I discuss the details of these comparisons of models with measurements, their implications, and possible future measurements with potential to clarify these outstanding issues.

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“…Advantage has been taken of this to study a number of β-delayed neutron emitters [25]. Rocinante has been used successfully in a number of experiments [23,24].…”

Section: The Historymentioning

confidence: 99%

Beta decay studies with total absorption spectroscopy and theLucreciaspectrometer at ISOLDE

Rubio

Gelletly

Algora

et al. 2017

J. Phys. G: Nucl. Part. Phys.

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Beta decay studies with the total absorption technique B Rubio, W Gelletly, E Nácher et al.Towards detailed knowledge of atomic nuclei -the past, present and future of nuclear structure investigations at GSI J Gerl, M Grska and H J Wollersheim Beta decay studies with total absorption spectroscopy and the Lucrecia spectrometer at ISOLDE Here we present the experimental activities carried out at ISOLDE with the total absorption spectrometer Lucrecia, a large 4π scintillator detector designed to absorb a full gamma cascade following beta decay. This spectrometer is designed to measure β-feeding to excited states without the systematic error called Pandemonium. The set up allows the measurement of decays of very short half life. Experimental results from several campaigns, that focus on the determination of the shapes of β-decaying nuclei by measuring their β decay strength distributions as a function of excitation energy in the daughter nucleus, are presented.

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Total Absorption Spectroscopy Study ofRb92Decay: A Major Contributor to Reactor Antineutrino Spectrum Shape

Cited by 76 publications

References 40 publications

Getting the most neutrinos out of IsoDAR

Getting the most neutrinos out of IsoDAR

The Energy Spectrum of Reactor Antineutrinos

Beta decay studies with total absorption spectroscopy and theLucreciaspectrometer at ISOLDE

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