Institute for Nuclear and Particle Astrophysics (INPA) at LBNL

The INPA Seminar weekly talks are on Fridays, starting at 12:00 pm, unless informed otherwise. The seminar talk starts with a brief presentation of the weekly scientific news. Typically, the talks conclude by 1:00 pm. The seminars are held in the Sessler Conference Room,  located in Bldg. 50A- 5132.

The committee members are:

The seminar schedule for the Institute for Nuclear and Particle Astrophysics (INPA) is tentative and becomes final a few days before the Friday talk.

Please send all suggestions for future INPA talks and speakers to the INPA Committee.

To be added to the INPA News Mailing List, please contact Erica Hall.

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Speaker: Johann Martyn (Mainz University) Title: “Using Cherenkov light to measure solar neutrinos in liquid scintillator detectors “

April 26 @ 12:00 pm - 1:00 pm


Date: Friday, April 26, 2024

Time: 12:00 PM – 1:00 PM

Location: Sessler Conference Room–50A-5132 [Hybrid and In-Person]

Speaker: Johann Martyn (Mainz University) [Remote talk]

Title: Using Cherenkov light to measure solar neutrinos in liquid scintillator detectors

Abstract: At present, solar neutrinos are observed either with liquid scintillator detectors or with water Cherenkov detectors. Liquid scintillator detection in particular is the only technique that allows precision spectroscopy of sub-MeV solar neutrinos, which is made possible by the high light-yield of the scintillation, allowing for a low energy threshold of ∼0.2 MeV. In contrast, water Cherenkov detectors are only able to measure solar neutrinos above a few MeV with high precision. They reconstruct the event direction via the corresponding Cherenkov photon hits, to differentiate between the solar neutrino signal and the background events. A hybrid event detection approach, combining both the directional Cherenkov information and the high light-yield and low energy threshold of the scintillation spectroscopy enables an unprecedented precision for the measurement of solar neutrinos and potentially other physics goals. This talk describes the first measurement of solar neutrinos in a liquid scintillator detector through their directional Cherenkov photons, using Borexino, a 280 ton, high light-yield liquid scintillator detector at the Gran Sasso National Laboratory in Italy.

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Meeting ID: 950 1669 6011


April 26
12:00 pm - 1:00 pm

INPA guests from campus can now come to the lab early on Fridays. The INPA Common Room (50-5026) is reserved for our guests from 10:00 a.m. to 12:00 noon and from 1 p.m. to 5 p.m. Note that the seminars are now held in 50A-5132 to accommodate a more significant number of attendees.

CPTea Series (also known as INPA Tea Series)

The Physics Division CPTea Series invites you to an In-Person Tea Series 1st Friday of every month at 3:30 pm INPA Conference Room 50-5026.

Everyone is welcome to attend the open forum. Tea and light refreshments will be served.


INPA Common Room (50-5026)
3:30 pm

Access to the Lab

For a shuttle pass, please email Erica Hall. The pass is only valid for the day of the seminar.

Erica Hall