[Triumf-seminars] TRIUMF Special Seminar today at 10:00

[TRIUMF Seminars]

Date/Time: Thu 2020-06-11 at 10:00

Location:  Virtual             

Speaker:   Ruben de Groote (University of Jyvaskyla)

Title:     New frontiers in optical spectroscopy of radioactive nuclei

Abstract: Laser spectroscopy provides model-independent access to important probes of nuclear structure. Through measurements of the atomic hyperfine structure, magnetic dipole and electric quadrupole moments, as well as nuclear spins and nuclear charge radii can be obtained. In this talk, I will show state-of-the-art experimental results, and how they can be used to test equally cutting-edge nuclear theory.
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The instrumentation that has been developed over the past years for studies of rare isotopes can also be used to investigate open questions in other fields. As an example, I will discuss recent measurements of the molecular structure of several radioactive RaF isotopologues. RaF is predicted to have an electronic structure conducive to laser cooling, and a strongly enhanced sensitivity to symmetry-violating nuclear moments. Prior to our recent experiment, no information on the spectra of these molecules existed. Our work will thus not only inform future beyond-standard-model searches with RaF, it also illustrates yet again how the capabilities of modern radioactive ion beam facilities can offer new opportunities for fundamental physics.
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Exploiting the new opportunities offered by radioactive probes for beyond standard model physics will rely crucially on the implementation of more precise spectroscopy tools. These in turn will impact nuclear structure studies. I will discuss these implications for one of several unexplored observables we can try to determine for radioactive isotopes in the future: the magnetic octupole moment. This higher-order nuclear moment has only been measured for a handful stable isotopes so far. I will discuss measurements on stable 173-ytterbium, which was recently suggested to be exceptionally sensitive to the presence of a magnetic octupole moment, and also on 45-scandium, for which I developed a high-precision radio-frequency spectroscopy technique.
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Seminar at
https://bluejeans.com/780255733  ***** Students and postdocs share research at https://bluejeans.com/304423781/6167 at 11:45 Friday

Scientist candidate for fundamental physics with ISAC

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General TRIUMF seminar information available at http://www.triumf.ca/home/upcoming-events/about-seminars-lectures