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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February 25, 2022 @ 12:00 pm - 1:00 pm

Location: via Zoom

Speaker: Ralph Massarczyk (LANL)

Title: Results from the BEST Sterile Neutrino Oscillation Experiment 


The Baksan Experiment on Sterile Transitions (BEST) searches for the oscillations between active and sterile neutrinos by exploring the gallium anomaly. Based on the Gallium-Germanium Neutrino Telescope (GGNT) of the SAGE experiment, the BEST setup is comprised of two zones of liquid Ga target to explore neutrino oscillations on the meter scale. Any deficits in the 71Ge production rates in the two zones, as well as the differences between them, would be an indication of nonstandard neutrino properties at this short scale. From July 5th to October 23rd 2019, the two-zone target was exposed to the mainly monoenergetic Cr neutrino source ten times with 20 independent 71Ge extractions from the two Ga targets. The 71Ge decay rates were measured from July 2019 to March 2020 to determine the total production rate from the neutrino source. At the end of the experiment, the counting systems were calibrated using 71Ge isotope data taken in November 2020. In this talk, I will give an overview of the experiment and the analysis, and discuss the results from the BEST sterile neutrino oscillation experiment.
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Meeting ID: 979 8302 5115


February 25, 2022
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