Mainz 2012 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 59: Struktur und Dynamik von Kernen

HK 59.2: Vortrag

Freitag, 23. März 2012, 11:30–11:45, P 4

Towards In-Trap-Spectroscopy at MATS/FAIR — •Christine Weber, Jasmin Moazzami-Fallah, Peter Müller, Jurek Szerypo, and Peter Thirolf — Fakultät für Physik, LMU - München, 85748 Garching

A novel in-trap spectroscopy setup is developed at MLLTRAP/Garching to be implemented in the future MATS facility at FAIR/GSI. It combines the high-resolution purification capabilities of a Penning trap with a customized detector trap setup, providing both, storage and detection. In this way, decay-spectroscopy experiments of purified nuclides, free from any background or scattering effects, will become feasible. Here, the main trapping electrodes are replaced by position-sensitive Si-strip detectors and emitted electrons are efficiently guided by the strong field of the trap magnet towards distant electron detectors. Possible experiments are conversion-electron spectroscopy and intrap α-decay experiments of heavy actinides. Moreover, a coincident detection of an α decay with an electron detection allows to reconstruct the original positions of electron clouds initiated by shake-off as well as from subsequent conversion decay. Via this decay length, the half-lives of excited (2⁺) states populated by α decay can be derived in a unique type of recoil-distance method. In this presentation, possible physics experiments and the design of the setup are presented.

[*] Supported by the BMBF (06ML9148), DFG (HA 1101/14-1), and MLL.