Related Experiment Video
Updated: Aug 29, 2026

High-Resolution Neutron Spectroscopy to Study Picosecond-Nanosecond Dynamics of Proteins and Hydration Water
Published on: April 28, 2022
Determination of the 8B neutrino spectrum
W T Winter1, S J Freedman, K E Rehm
1Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
Abstract:
We have measured the total energy of the alpha particles following the beta decay of 8B by implanting 8B into a planar silicon surface barrier detector. Calibration was performed using alpha particles following the beta decay of 20Na, similarly implanted. The alpha spectrum is used to infer the 8B neutrino spectrum which is an important input in the interpretation of experiments that detect energetic neutrinos from the Sun. The alpha spectrum reported here is in disagreement with the previous best measurement which used two detectors in coincidence.
Related Concept Videos
Emission Spectra
Atomic Emission Spectroscopy: Instrumentation
Atomic Emission Spectroscopy: Lab
Atomic Emission Spectroscopy: Overview
Atomic Emission Spectroscopy: Interference
Atomic Nuclei: Nuclear Spin State Population Distribution

