Method to reduce noise for measurement of 7Be and 8B solar neutrinos on gallium-71

No Thumbnail Available
Authors
Folkerts, Jonathan
Solomey, Nickolas
Hartsock, Brooks
Nolan, Tyler
Pacheco, Octavio
Pawloski, Gregory
Advisors
Issue Date
2025-03
Type
Article
Keywords
Background reduction , Double-pulse , Gallium , Neutrino , Solar
Research Projects
Organizational Units
Journal Issue
Citation
Abstract

Gallium solar neutrino experiments have historically used radiochemical counting to determine the event rate. A detector which directly measures the ejected electron and a nuclear de-excitation gamma could reduce background counting rates by way of a double-pulse technique. We find this reduction could be as large as 6 orders of magnitude in a 1.5 ton detector when compared with experiments that allow ground-state transitions. In our process, the detector measures the excited nuclear final state of the germanium after an electron neutrino interacts with gallium nucleus through the charged-current interaction. This results in a loss of approximately 90% of the total neutrino signal, but higher energy processes are less suppressed. The neutrinos resulting from this higher energy selection are predominantly from the 8B and 7Be solar neutrino fluxes. © 2024

Table of Contents
Description
Click on the DOI link to access this article at the publishers website (may not be free).
Publisher
Elsevier B.V.
Journal
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Book Title
Series
PubMed ID
ISSN
01689002
EISSN