Long term stability of the energy of conversion electrons emitted from solid 83Rb/83mKr source

TL;DR

This paper investigates the long-term energy stability of mono-energetic conversion electrons from solid 83Rb/83mKr sources, crucial for precise calibration in neutrino mass experiments like KATRIN.

Contribution

It provides an experimental assessment of the energy stability of conversion electrons from solid 83Rb/83mKr sources over time.

Findings

Demonstrated the stability of 7.5 keV and 17.8 keV electrons over extended periods

Validated the use of solid 83Rb/83mKr sources for calibration in neutrino experiments

Provided data supporting the reliability of these sources for systematic studies

Abstract

The mono-energetic conversion electrons from the decay of 83mKr represent a unique tool for the energy calibration, energy scale monitoring and systematic studies of the tritium beta spectrum measurement in the neutrino mass experiment KATRIN. For this reason, the long term stability of energy of the 7.5 keV and 17.8 keV conversion electrons populated in the decay of solid 83Rb/83mKr vacuum evaporated sources was examined by means of two electron spectrometers.