Hyperfine Interactions

, Volume 223, Issue 1, pp 201–206

Decay studies for neutrino physics

Electron capture decays of 100Tc and 116In


    • CENPAUniversity of Washington
  • S. Sjue
    • CENPAUniversity of Washington
  • E. Swanson
    • CENPAUniversity of Washington
  • C. Wrede
    • CENPAUniversity of Washington
    • Department of Physics and Astronomy and National Superconducting Cyclotron LaboratoryMichigan State University
  • D. Melconian
    • Texas A&M University
  • A. Algora
    • Instituto de Fisica CorpuscularUniversity of Valencia
  • I. Ahmad
    • Argonne National Laboratory

DOI: 10.1007/s10751-012-0619-2

Cite this article as:
García, A., Sjue, S., Swanson, E. et al. Hyperfine Interact (2014) 223: 201. doi:10.1007/s10751-012-0619-2


Both 100Mo and 116Cd are zero-neutrino double-β-decay candidates with Jπ = 0 +  and the ground states of the respective intermediate nuclei, 100Tc and 116In, have Jπ = 1 + . This makes it possible to measure these matrix elements, which turn out to provide a valuable benchmark for testing models. The electron-capture (EC) decay of 100Tc can also be used to directly determine the efficiency of a potential neutrino detector. However, the experimental determinations of the EC decay branches of interest are challenging because they are only small fractions of the main decays and co-produced radioactivities contribute significant background counts in the regions of interest. This article summarizes our work at Jyväskylä, where we have taken advantage of the high-purity beams produced at IGISOL in combination with JYFLTRAP to achieve significant improvements in the determinations of the EC branches of 100Tc and 116In.


NeutrinosDouble-beta decayElectron-capture decayNuclear structure

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© Springer Science+Business Media B.V. 2012