# Münster 2017 – wissenschaftliches Programm

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# HK: Fachverband Physik der Hadronen und Kerne

## HK 41: Structure and Dynamics of Nuclei VI

### HK 41.5: Vortrag

### Donnerstag, 30. März 2017, 15:15–15:30, F 2

**Nuclear charge radii and quadrupole moments of neutron-rich tin isotopes** — •Christian Gorges for the COLLAPS-IS573 collaboration — Institut für Kernphysik, TU Darmstadt, D-64289 Darmstadt, Germany

The tin isotopes have a magic proton number (Z=50) and the most stable isotopes of all elements.
Therefore tin has always been a key element in the understanding of nuclear theory.
Laser spectroscopy measurements have been performed previously with low resolution up to the doubly magic nucleus ^{132}Sn [1]. To extract magnetic dipole and electric quadrupole moments, these measurements have now been repeated using high-resolution laser spectroscopy at the COLLAPS beam line at ISOLDE, CERN. Furthermore, isomers along the chain from ^{113m−131m}Sn have been investigated and the data is extended up to ^{134}Sn allowing the investigation of the strength of the characteristic kink at *N*=82.
In the elements above tin a clear change in the slope is observed in the mean square charge radius when crossing the magic neutron number *N* = 82. It is, however, weaker for tellurium (*Z*=52) than in xenon (*Z*=54).
Hartree-Fock-Bogoliubov calculations have recently been performed confirming this behaviour and predicting such a kink in the nuclear charge radii also for the tin isotopes [1,2]. The nuclear charge radii as well as the isomer shifts will be presented.

[1] F. Le Blanc et al., Phys Rev C **72**, 034305 (2005)

[2] N. Schunck et al., Comput. Phys. Commun. **183**, 166 (2012)

[3] M. Kortelainen et al., Phys. Rev. C **85**, 024304 (2012)