Gamma-ray energies and intensities observed in decay chain $^{83}Rb$/$^{83m}Kr$/$^{83}Kr$

TL;DR

This study re-measured gamma-ray spectra in the $^{83}Rb$/$^{83m}Kr$ decay chain to improve data accuracy, identify new transitions, and refine energies, aiding neutrino and dark matter research.

Contribution

The paper provides more precise gamma-ray data for the $^{83}Rb$/$^{83m}Kr$ decay chain, including a new transition and improved uncertainties, updating measurements from 1976.

Findings

Gamma-ray intensities agree with previous data.

Identified a new gamma transition.

Improved energy uncertainties by a factor of 4.3.

Abstract

Radioactive sources of the monoenergetic low-energy conversion electrons from the decay of isomeric $^{83m}Kr$ are frequently used in the systematic measurements, particularly in the neutrino mass and dark matter experiments. For this purpose, the isomer is obtained by the decay of its parent radionuclide $^{83}Rb$. In order to get more precise data on the gamma-rays occuring in the $^{83}Rb$/$^{83m}Kr$ chain, we re-measured the relevant gamma-ray spectra, because the previous measurement took place in 1976. The obtained intensities are in fair agreement with this previous measurement. We have, however, improved the uncertainties by a factor of 4.3, identified a new gamma transition and determined more precisely energies of weaker gamma transitions.