Colloquium Dr. Aldo Ianni (Laboratori Nazionali del Gran Sasso)
20 - 01 - 2017 om 11:00 tot 20 - 01 - 2017 om 12:00
Friday 20 January, 11.00h, at Nikhef in H331.
Speaker: Dr. Aldo Ianni (Laboratori Nazionali del Gran Sasso)
Title: “The Borexino experiment at the Gran Sasso Underground Laboratory”.
Borexino at the Gran Sasso Laboratory is an unsegmented 300 tons liquid scintillator detector designed and built to search mainly for low energy (<1MeV)
solar neutrinos. Borexino has already operated for ten years and achieved a number of remarkable results in MeV and sub-MeV (anti)neutrino searches, such as a 5%
measurement of the 7Be solar neutrinos and observation of geo-neutrinos. In 2014, Borexino has detected the so-called proton-proton (pp) solar neutrinos.
The production of these neutrinos is very slow and drives the evolution of the Sun in a timescale of billions of years. Being the average energy of pp neutrino equal to 267 keV,
detection of these neutrinos in realtime is extremely difficult. The high level of radio-purity reached in Borexino has allowed to measure pp neutrinos at 10% level.
In 2015, Borexino has measured geo-neutrinos with a 5sigma significance. In the talk the Borexino detector and its history since the early proposal in 1988 will be reported. A review of the main achievements in Borexino, including solar neutrinos, geo-neutrinos and rare events searches, will be presented. Next future perspectives with Borexino will be reviewed.
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