# Long-term monitoring of the ANTARES optical module efficiencies using$^{40}\mathrm{{K}}$ decays in sea water

Abstract : Cherenkov light induced by radioactive decay products is one of the major sources of background light for deep-sea neutrino telescopes such as ANTARES. These decays are at the same time a powerful calibration source. Using data collected by the ANTARES neutrino telescope from mid 2008 to 2017, the time evolution of the photon detection efficiency of optical modules is studied. A modest loss of only 20% in 9 years is observed. The relative time calibration between adjacent modules is derived as well.
Document type :
Journal articles

https://hal.archives-ouvertes.fr/hal-01815117
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Submitted on : Wednesday, June 13, 2018 - 6:30:19 PM
Last modification on : Wednesday, December 11, 2019 - 8:26:02 AM

### Citation

A. Albert, M. André, M. Anghinolfi, G. Anton, M. Ardid, et al.. Long-term monitoring of the ANTARES optical module efficiencies using$^{40}\mathrm{{K}}$ decays in sea water. Eur.Phys.J.C, 2018, 78 (8), pp.669. ⟨10.1140/epjc/s10052-018-6132-2⟩. ⟨hal-01815117⟩

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