Probing the absolute neutrino mass scale with 163Ho: The HOLMES project
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2018
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Abstract
The HOLMES project aims to directly measure the ν mass down to the eV scale using the electron capture decay (EC) of 163Ho. It will perform a precise calorimetric measurement of the end-point of the Ho energy spectrum looking for the deformation caused by a finite ν mass. The choice of 163Ho as source is driven by the very low Q-value of the EC reaction, which allows for high sensitivity with low activities (O(102)Bq/detector), thus reducing the pile-up probability. A large array made by thousands of transition edge sensors based micro-calorimeters will be used. The calorimetric approach eliminates systematic uncertainties arising from the use of an external β source, and minimizes the effect of the atomic de-excitation process. The commissioning of the first implanted sub-array is scheduled for the end of 2018. It will provide useful data about the EC decay of 163Ho together with a first limit on ν mass.
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vale2018nuclearprobing
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| Authors | M. De Gerone,B. Alpert,D. Becker,D. Bennett,M. Biasotti,V. Ceriale,R. Dressler,M. Faverzani,E. Ferri,J. Fowler,G. Gallucci,J. Gard,F. Gatti,A. Giachero,J. Hays-Wehle,S. Heinitz,G. Hilton,U. Koester,M. Lusignoli,J. Mates,A. Nucciotti,S. Nisi,A. Orlando,G. Pessina,A. Puiu,S. Ragazzi,C. Reintsema,M. Ribeiro Gomes,D. Schmidt,D. Schumann,D. Swetz,J. Ullom,L. Vale;M. De Gerone;B. Alpert;D. Becker;D. Bennett;M. Biasotti;V. Ceriale;R. Dressler;M. Faverzani;E. Ferri;J. Fowler;G. Gallucci;J. Gard;F. Gatti;A. Giachero;J. Hays-Wehle;S. Heinitz;G. Hilton;U. Koester;M. Lusignoli;J. Mates;A. Nucciotti;S. Nisi;A. Orlando;G. Pessina;A. Puiu;S. Ragazzi;C. Reintsema;M. Ribeiro Gomes;D. Schmidt;D. Schumann;D. Swetz;J. Ullom;L. Vale; |
| Journal | nuclear instruments and methods in physics research section a: accelerators, spectrometers, detectors and associated equipment |
| Year | 2018 |
| DOI |
10.1016/j.nima.2018.10.108
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