Münster 2017 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 51: Instrumentation XII
HK 51.8: Vortrag
Donnerstag, 30. März 2017, 18:30–18:45, F 072
An Improved Charge Exchange Cell for Collinear Laser Spectroscopy — •Felix Sommer1, Peter Müller2, Jason Clark2, Jörg Krämer1, Bernhard Maass1, Rodolfo Sanchez3, Guy Savard2, and Wilfried Nörtershäuser1 — 1IKP, TU Darmstadt, DE — 2ANL, Chicago, USA — 3GSI, Darmstadt, DE
Collinear laser spectroscopy (CLS) provides the opportunity to extract nuclear charge radii and magnetic dipole as well as electric quadrupole moments in a nuclear-model independent way. CLS utilizes the reduction of velocity spread via acceleration with a DC high-voltage potential of typically a few 10 kV. The isotopes of interest have to exhibit electronic transitions which are accessible with laser systems and sensitive to changes of nuclear charge radii. If these are not available from the ionic ground state, charge exchange can provide access to suitable atomic transitions.
We present an updated design of a charge exchange cell for CLS, that can hold acceleration potentials up to 30 kV and operate at temperatures above 430 ∘C to allow for charge exchange with magnesium vapor. The cell is developed in Darmstadt and will be used at Argonne National Laboratory (ANL), where the CAlifornium Rare Isotope Breeder Upgrade (CARIBU) opens up new possibilities for in-flight laser spectroscopy of short lived isotopes, especially in the region beyond the sudden deformation at N=60 and Z>38.
This work is supported by the U.S. DOE, Office of Science, Office of Nuclear Physics, under contract DE-AC02-06CH1135, and by the Deutsche Forschungsgemeinschaft through Grant SFB 1245.