Mainz 2017 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 9: Precision Spectroscopy II
A 9.6: Vortrag
Montag, 6. März 2017, 18:15–18:30, N 3
Nuclear transitions induced by atomic processes — Andrey V. Volotka1, Andrey Surzhykov2,3, Stephan Fritzsche1,4, and •Robert A. Müller2,3 — 1Helmholtz-Institute Jena, Jena, Germany — 2Physikalisch-Technische Bundesanstalt, Braunschweig, Germany — 3Technische Universität Braunschweig, Braunschweig, Germany — 4Friedrich-Schiller-Universität Jena, Jena, Germany
The investigation of nuclei in isomeric (metastable) states gives important insight into their inner dynamics. Moreover the low lying nuclear excitation at a few eV in 229Th has received strong interest because of its applicability for a nuclear clock [1]. For the majority of these studies the nuclear isomers are produced by neutron collisions or as products of the radioactive decay series of heavier elements. A direct photoexcitation seems possible as well but turns out to be a very difficult task due to the extremely narrow linewidths of the nuclear states. In contrast to photons, atomic electrons have a large overlap with the nucleus and, hence, are not only sensitive to nuclear properties but can also be used instead of photons to induce nuclear excitations [2]. In this contribution we will discuss different possible scenarios for the excitation of nuclei via electronic processes. We will especially concentrate on two-photon processes in highly charged ions and multi-step schemes in almost neutral systems, e.g. Th2+, that can be realized using optical lasers.
[1] E. Peik and M. Okhapkin, C. R. Physique 16, 516-523 (2015)
[2] R. A. Müller et al., NIMB (2016) submitted