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Journal Article

Direct decay-energy measurement as a route to the neutrino mass

MPS-Authors
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Karthein,  Jonas
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;
CERN, Route de Meyrin, 1211 Genève, Switzerland;

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Blaum,  Klaus
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Eliseev,  Sergey
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Filianin,  Pavel
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

Mougeot,  Maxime
CSNSM-IN2P3-CNRS, Université Paris-Sud, 91400 Orsay, France;
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

External Resource

https://link.springer.com/content/pdf/10.1007%2Fs10751-019-1601-z.pdf
(Publisher version)

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Fulltext (public)

1905.05510.pdf
(Preprint), 630KB

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Citation

Karthein, J., Atanasov, D., Blaum, K., Eliseev, S., Filianin, P., Lunney, D., et al. (2019). Direct decay-energy measurement as a route to the neutrino mass. Hpyerfine Interactions, 240: 61. doi:10.1007/s10751-019-1601-z.


Cite as: https://hdl.handle.net/21.11116/0000-0004-4C1C-9
Abstract
A high-precision measurement of the 131Cs → 131Xe ground-to-ground-state electron-capture QEC-value was performed using the ISOLTRAP mass spectrometer at ISOLDE/CERN. The novel PI-ICR technique allowed to reach a relative mass precision δm/m of 1.4 ⋅ 10− 9. A mass resolving power m/Δm exceeding 1 ⋅ 107 was obtained in only 1s trapping time. Allowed electron-capture transitions with sub-keV or lower decay energies are of high interest for the direct determination of the νe mass. The new measurement improves the uncertainty on the ground-to-ground-state QEC-value by a factor 25 precluding the 131Cs → 131Xe pair as a feasible candidate for the direct determination of the νe mass.