Mainz 2017 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 9: Precision Spectroscopy II
A 9.3: Vortrag
Montag, 6. März 2017, 17:30–17:45, N 3
High-resolution In-source Laser Spectroscopy of Hyperfine Structures and Isotope Shifts on 163,165,166mHo Isotopes for the ECHo Project — •Reinhard Heinke1, Tom Kieck1, Tobias Kron1, Sebastian Raeder2, Marcel Trümper1, Carsten Weichhold1, and Klaus Wendt1 — 1Johannes Gutenberg-Universität, Mainz — 2Helmholtz-Institut Mainz
The ECHo project aims for a measurement of the electron neutrino mass by precise analysis of the electron capture decay spectrum of 163Ho. As part of this project, 163Ho ions are implanted into metallic microcalorimeters, applying the highly selective laser resonance ionization technique at the RISIKO mass separator at Mainz University. In order to fully exploit the opportunities of isotope selective ionization, suppressing the interfering contamination of radioactive 166mHo even further, detailed knowledge of the hyperfine structure of the atomic transitions is mandatory. Therefore, high resolution laser spectroscopic investigations were performed on 163,165,166mHo isotopes, using a pulsed frequency doubled injection-locked high repetition rate titanium:sapphire laser system in combination with a newly developed dedicated ion source with perpendicular atom - laser beam interaction geometry in a radiofrequency quadrupole structure. First results on atomic and nuclear structure parameters are presented, including first-time optical measurements on 166mHo.