Dresden 2017 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 36: Postersession I
DS 36.43: Poster
Mittwoch, 22. März 2017, 17:00–19:00, P2-EG
Production of fully Au-embedded 163Ho for Neutrino Mass Measurements — •Tom Kieck1,2, Christoph Düllmann1, Lisa Gamer3, Leonard Winkelmann2, and Klaus Wendt2 — 1Institut für Kernchemie, Johannes Gutenberg-Universität Mainz, Germany — 2Institut für Physik, Johannes Gutenberg-Universität Mainz, Germany — 3Kirchhoff-Institut für Physik, Universität Heidelberg, Germany
The ECHo collaboration aims at measuring the electron neutrino mass by recording the spectrum following electron capture of 163Ho using metallic magnetic calorimeters (MMC). The radioisotope 163Ho has been produced from enriched 162Er in a high flux nuclear reactor and has to be fully embedded into the 250 x 250 µm2 MMC-absorbers with minimum losses [1].
The application of resonant laser ionization at the RISIKO mass separator guarantees optimum elemental and isotopic selectivity for ultra-pure 163Ho ion implantation with a sub millimeter beam spot [2]. An in-situ deposition of gold using the technique of pulsed laser deposition (PLD) ensures a homogeneous 163Ho/Au layer production as absorber of the MMC. In this way a saturation of the implantation-dose by sputtering effects is prevented and the targeted activity of 10 Bq per detector is achieved.
[1] Hassel et al., J. Low Temp. Phys. 184, 910-921 (2016)
[2] Schneider et al., NIM B 376, 388-392 (2016)