Seminario di Dipartimento: First detection of solar neutrinos from the CNO fusion cycle with the Borexino detector (video disponibile)
Physics Department seminar
DIPARTIMENTO DI FISICA, VIA CELORIA 16, MILANO
Aula Consiglio VIRTUALE, link dedicato
8 Marzo 2021 ore 14:30
ALESSANDRA CARLOTTA RE
Università di Milano and INFN Milano
First detection of solar neutrinos from the CNO fusion cycle with the Borexino detector
Students are cordially invited – Contact firstname.lastname@example.org
Borexino is a liquid-scintillator experiment designed and constructed for real-time detection of low energy solar neutrinos.
It is installed at the underground Laboratori Nazionali del Gran Sasso (L’Aquila, Italy) and started taking data in May 2007.
Today, after a challenging campaign of hardware improvement aimed at controlling its temperature and reducing the intrinsic radioactive background, the Borexino
detector is characterized by the most extreme and unique radiopurity.
The Borexino collaboration has recently published in Nature* the first experimental evidence of the CNO (Carbon-Nitrogen-Oxygen) neutrinos produced in the Sun.
While being a secondary mechanism of energy production in our star, the CNO cycle is the main nuclear engine in more massive stars: this result is therefore
crucial for the precision modeling of solar physics and for astrophysics in general
since it confirms the existence of this nuclear fusion process in our Universe.
The details of the detector stabilization as well as the event selection criteria and the strategy adopted by the Borexino collaboration for successfully isolating the spectral component of the CNO signal from the residual backgrounds will be
*Nature 587, 577–582(2020)